Five years in 49 minutes
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- Опубликовано: 28 сен 2024
- I've had piles and piles of questions about the research that I did in gradschool, so here it is! Be careful what you wish for... About a year ago I defended my dissertation from UCSB in Materials, exploring, among other things, growth of a semiconductor called lead selenide, a narrow-gap material with a bright (ba-dum-tss) future in the realm of infrared optoelectronics. I hope you enjoy!
For more information than you could ever reasonably desire:
escholarship.o...
Viewers of the channel are probably going to be most interested in all the fun machines featured in chapter 2, "Experimental Methods"
- Molecular beam epitaxy (making crystals in ultra high vacuum)
- X-ray diffraction (explained with almost no math)
- Electron microscopy (many variants)
Music in this video:
I Dunno by grapes is licensed under a Creative Commons Attribution license (creativecommon...) ccmixter.org/fi...
So apparently my pinned comment vanished for no reason - here goes take 2: WELCOME TO THE COMMENTS of what will certainly NOT be my most popular video! For more information than you could ever reasonably desire, my dissertation is here: escholarship.org/content/qt9mj491xk/qt9mj491xk.pdf
Viewers of the channel will probably be most interested in all the fun machines in Chapter 2: Experimental Methods, which talks about growing crystals with (and maintaining) an MBE system, X-ray diffractometry (explained with *almost* no math), and many many variants of electron microscopy. Enjoy!
Halfway through your dissertation and wanted to jump back here to say how much I enjoyed your defense, appreciate you sharing it, and how well your voice comes through in you writing. Back to the paper!
To you we don't look like that camera, we look like you believe you look when you're talking into it
Mind blown, right? 😉
P.S. I enjoy your content a lot. You literally bridge the gap between what I've been able to learn and what an expert would learn extra-heemly well =p
What was your first question that you say you "flubbed"? and how did you answer it?
I could not fathom putting my master's defense out there like this. Well done, and congratulations.
I think the most surprising thing about this was that I, whose best chemistry qualification is "did ok in high school," could understand the whole thing. I assume that speaks to your skills as a science communicator more than anything! Thank you for publishing this, it's great to know the motivation behind the work we've seen so many snippets of. It's a shame we didn't get to see the q&a section too! but I imagine that's a more vulnerable and therefore personal part of the process. Thank you for sharing, I really enjoyed it!
I left out the public Q+A just for privacy of everybody else, but the committee grilling is always behind closed doors - even on zoom (my studio audience went outside for a little while😁)
I also flubbed the first committee question HARD… but they liked it anyways 😬
I’m glad you liked the talk!
@@AlphaPhoenixChannel I actually really week at chemistry still did understand it, I was actually just going to watch 10 min and stop, but you made me watch till the end...
Congratulations for PhD ☺
What was the first question?
i agree - it was perfectly presented - and i think it was all understandable even for people not in the field. the Q&A probably went into details that are beyond me, but the presentation was perfect.
I strongly agree!!!
Seeing those dislocations annihilate was genuinely really cool. I agree that that was one of the more amazing pieces of microscopy that you showed.
Came here to say that. Really amazing
I was so unreasonably excited when I found that event in a timelapse I’d just taken 😁
@@MusicBent Ditto! They reminded me of a common analogy for particle-antiparticle annihilations. Wondering if they could be used as an analog for that experimentally in any way?
This and the picture of the dislocation pattern differences between the two crystals on different planes
@@AlphaPhoenixChannel Nothing unreasonable about it!
Hello everybody! Welcome to the few braving the comments section on what is most certainly NOT going to be my most popular video! For more information than you could ever reasonably desire, my dissertation is here: escholarship.org/content/qt9mj491xk/qt9mj491xk.pdf
Viewers of the channel are probably going to be most interested in all the fun machines featured in Chapter 2, "Experimental Methods", which tackles crystal growth via Molecular Beam Epitaxy, X-ray diffraction (explained with almost no math), and many many variants of electron microscopy. The eagle eyed viewer may notice that graphics made for the lab and graphics made for youtube videos have slowly blended over time...
I know a masters is uncommon in physics, do you have one? Also do your advisors know about your channel? Also also would this be considered condensed matter physics?
I think this might be more popular than you might think. This for me who know close to nothing love this as i do sort of understand some basics while you do explain it so i understand parts of what goes into this.
I wouldnt be able to do it, but i can understand the jist of things and that helps understand the world if you "get the jist of things" on many topics. and i just love that :D.
So far is one of my favorite videos on your channel. Wish we had more 'at the extremes of human knowledge' public communicators. Great stuff!
(Late) congrats to you Brian! I'm in the 3rd year of my physics PhD, it's been a lot of fun so far. Great defense :)
Having recently defended my undergrad thesis and considering to start a Master's, I gotta say your passion to the topic really seeps through you when you are defending your work.
Congrats again! All good to you!
The dislocation annihilation imaging was seriously cool. As an electrical engineer I really disliked my semiconductor physics class. I really do appreciate the Many decades of work in the field. I remember when GaN power transistors were prohibitively expensive, and now it’s in lots of our fast chargers.
Congrats on your accomplishment!! I think you did a great job presenting your work to multiple audiences. You got me excited at least
I find it incredible how much effort is required to bring a semiconducting device to market. For any individual component you can go buy on digikey, there's probably 30-50 years of R&D by thousands of different people
I find it incredible that the computer I bout this year can beat any super computer form before the 1980s
@@AlphaPhoenixChannel from an electronics perspective, is the goal of moving to these lower valence band gaps to increase the switching speed that we can get out of semiconductor materials?
It's quite interesting to see what these defense lectures look like. Keep up the great content :)
@@AlphaPhoenixChannel is radiation released during dislocation annihilation? Maybe just phonon excitations? Something must happen, it's so analogous to electron-hole recombination.
Does anyone have a timestamp for that?
As someone who is thinking about going into academia taking a masters etc. this will be fun to watch to get an idea of how these defences go.
That’s the idea! Good luck with deciding 😁
It's basically just a long presentation on what you did, and your professor says "are you sure there's enough work here for a MSc" *right after* one of the other profs on the committee says "there's WAY TOO much work here for a MSc - are you sure you got the letters right on this one [name of supervisor prof]??". Then the curb your enthusiasm music plays and the credits roll. That's pretty much how all of them go. Oh, and then you get a job where you do the same work as PhDs, but get paid $20k to $30k less because "the letters were wrong". Sad, but true
not to sound dismissive but what is the appeal of pursuing a career in academia opposed to something in the private sector or even an applied field. academia seems so stuffy and up tight from my perspective
nevermind, 10 minutes in and this shit is neat, I get it now
@@zlandauer Lmao, great! also keep in mind that research in different fields of science is vastly different
Can't believe you thought this could be boring. I hated every moment of highschool because it wasn't as concise as it could be. This is perfect
As a applied material sciences engineer myself, this was extremely satisfying to watch. Very nice work.
I have followed your channel long enough that this talk felt like a refresher.
👏🏼👏🏼👏🏼👏🏼 You’re a highly engaging presenter. All your RUclips productions talking to a camera surely improved your ability to garner interest in your work and transfer information to an unseen audience.
To prove I watched the whole dissertation: 46:40 accidentally said 010 planes and a typo “peoperties”. Just pointing that out for fun.
I’m highly jealous of your chosen stream of research. I love thinking in spatial dimensions and the underlying physics allows the stimulation and flourishing of logical reasoning to solve problems. Unfortunately I chose Entomology which is based on an evolving system that’s constantly changing. Congratulations, Brian. Well deserved.
Yeah, I feel like I could happily stare at the kind of images and data he showed for the rest of my life. I'm not upset with my current profession, but it's less discovery for me at this point and more running through the paces..
On that day in particular when I had to talk to a camera for an hour, eye contact with the camera was EXTREMELY aided by RUclips filming experience 😁
@@AlphaPhoenixChannel Dude, 190K(!) views is probably the most watched dissertation on social media. It's testament to your science communication skills. I take my hat off to you, stand for applause and wait eagerly for more.
Your family must be so proud. Your extended family is.
As someone who is specializing in the completely unrelated medical field, and whose only source of chemistry knowledge is undergrade chem, organic chemistry and biochem (as well as channels like yours). It is really impressive on your end that I was able to at least grasp like 90% of your presentation. You're genuinely amazing at this.
Hey, I only have hs and RUclips channels, I could understand approximately 90%. But I also have a deep interest in material sciences.
This should be the wave of the future, beyond just text based academic papers.
I wish all PhD defenses were recorded like this and published. Congrats, Dr. AlphaPhoenix :)
i do too!
thanks!
I haven’t studied science since high school, and I didn’t understand lots of the technical bits but generally this was pretty accessible and made a lot of sense! The question is, when are you renaming your channel to DrAlphaPhoenix? 😊
I did consider briefly changing my screen name in a game to “docPhoenix” because there’s a friend of mine who has “doc” as a screen name but I didn’t bother to figure out where that setting was 😂
@@AlphaPhoenixChannel ah, a fellow cultured man I see, joining the elite ranks of Dr. Gamers, such as the esteemed Dr. Disrespect! "The Doc"😂
That 49 minutes flew by. I work in the computer networking field so completely unrelated to material sciences, with the exception of telecom lasers that is! You are astounding with your ability to break down extremely complex and specialized topics into a digestible format. I truly appreciate you making videos for all to watch, and for your contagious excitement towards the thing that grasp your interest.
1350nm photon go vroom
Your RUclips channel will probably have a huge impact in my life. I am currently studying cheme and finished my sophomore year but realized that my matsci class was much more fun/interesting . As a result of your excellent videos I’m planning on switching to matsci. You did a fantastic job with making your dissertation both understandable and technically informative.
muahahaha - converting the masses to the beauty of crystals!
but really - awesome! whatever you end up doing, enjoy it!
I spent 4 years of my life refining a material that works quite well when it's a mess of atoms anyways :) congrats Doctor!
I`m a none native English speaking car mechanic that dropped out of school and yet you kept me captivated for the full 54min., well done!
As a materials scientist who spent many years(70s-90s) using (ordinary) STEM microscopes to study dislocations and nucleation/phase transitions in metal alloys, I really enjoyed your presentation. Being able to "see" Burgers vectors rather than determine them indirectly from extinction analysis of the diffraction contrast, is really amazing. I remember people from Arizona showing us impressive images using Field emission sources in UHV microscopes, but they were often looking at materials like semiconductors or gold atoms sitting on semiconductors and it was hard to imagine their utility for real-world materials like we use in jet engines. It is clear to see how your work can be applied to the manufacture of the devices that are increasingly important to our modern lives. Fascinating - thank you so much for a wonderful presentation
I’m going to go out on a limb and say this might be the most watched material science dissertation ever. It is certainly already the number one watched dissertation on RUclips (an actual dissertation not a how to video).
Oh crap! I learned something. I'll never need to use this... why did I watch? Seriously, great job, Brian! I took electron microscopy classes in the 90s and this makes sense to me. I'm envious of the STEM, we just had TEM and SEM. Congratulations!
I found myself watching the whole presentation in one take. Without needing breaks or needing to backtrack, which shows how well done it was
@53:40 - The applause had to have felt AMAZING. Just the instant reassurance that whatever comes next, they're at least not unimpressed.
Wow, I never thought I would watch a one hour video now. It felt like 10 minutes.
Thank you for sharing this. It's incredibly well explained, I could follow it almost completely and I have absolutely no material science background. It's great that we have so much knowledge so accessible.
I wish more researches would provide their research as accessible as this.
Very interesting. I did watch the entire thing, if you asked me about my interest in material science an hour ago, I'd have said I was fairly indifferent. But I think you have a real gift both for communicating the ideas intuitively, and expressing WHY it is interesting and satisfying , and I was hooked. Hooked like a PbSe surface treatment is at 400C.
You got mad guts plugging your yt channel in this. Respect
This is fascinating! I can see fragments from a few of the videos you’ve done over the past few years! It’s interesting to me how materials science is the easiest science to introduce children to, but is also probably the most technically complicated. Well maybe that applies to biology better, but it’s more work to get past the taxonomy and into the scientific method with biology.
It lays wonderfully midway in between physics and chemistry, and if you include the crystallography, an appetizing dash of math!
You thanked us for watching, but I'm thanking you for uploading this. Some friends and I watched this together and it was great! Thank you again.
I work in a methanol production plant as an operator and there's a saying that goes around which basically goes 'if you understand your shit you can explain it to someone who's dumb enough to lose their own ass' and it's amazing to see that kinda goes the same for something of this caliber. The small laymans terms here and there really make it easy for someone to follow along with the whole process and why you do it. Amazing!
"If you can't explain it in simple terms, you haven't fully grasped it yet." - Albert Einstein
Well, something like that, I'm roughly translating from the German original that was pinned up at my school.
@@hammerth1421 haha wouldn't surprise me if that saying went around the place i work at in the beginning when it was made in the 70's. Naturally over time the saying changed a bit due to work enviroment lingo and all that
I had no idea of any of this. I work in healthcare and manage a team of data analysts so have zero perspective on this. I myself can't believe that I watched this all the way through, and that is a serious testament to your ability to take that info and break it down to where I could grasp it. Thanks for sharing that - it was great!
Congratulations Dr. Haidet ! I also had to defend during covid two years ago but with less restrictions than for you, some weird times... Even if I'm not in the field of material science I feel like you did a great job, clear and precise talk, very nice. This video really has its place on your channel ! What are you doing next ? post-doc somewhere else ? staying in academia ? Soon Pr. Haidet ?
Working for a semiconductor company. Really agonized about leaving academia but I’m happy so far!
Finished this in one sitting, not knowing what I was going to be watching. Fantastic display of understanding. Easy to digest with a minimal amount of handwaving away important dense details. Your editorial room hopes to ramp it up for a general audience were met. I might also add that it was eloquent without feeling rehearsed. I believe that these are key characteristics to any scientific educator, coworker, or salesperson. This is what has made your content so successful on RUclips. This is what will make you successful.
This is such cool insight! I've been considering grad school as I'm nearing the end of undergrad and this type of thing makes me want to pursue it that much more. I didn't realize a dissertation defense was in this format at all, for some reason I always imagined a panel of judges that you're pleading your research case to lol
hahahahaha that comes later - in the private committee-only Q&A
but seriously, nobody would let you book a defense date unless they planned to pass you. by this point it's more of an extra-stressful victory lap than an actual examination. I flubbed the very first question of the closed-doors section with an answer as wrong as it could have been xD
I'm loving the symmetry between how we grow snowflakes is also how we grow crystalline structures in other materials, makes sense but it still blew my mind. I loved your presentation and found myself able to follow along to the very end so I'd say you did I great job at formatting it so it was approachable!
Also your idea for heating the substrate up to take advantage of only being able to form a single layer to create the best possible starting layer for the rest of the structure to form off, big brain move there.
as someone in the first year of materials engineering major considering a master or doctor's degree maybe, this is like fun to watch.
thanks dude and congratulations
Enjoy your studies! This was supposed to be a taste of what could be to come…
Absolutely brilliant presentation! The way you organized the dissertation, clear, concise, dense yet `fun`, is a great inspiration. Congratulations on your doctorate and thanks for sharing
Wow that was a really interesting presentation and surprisingly understandable! You did a great job explaining it. Thank you so much for sharing and I hope you have a fantastic rest of your day
Very nice! I enjoyed watching every second of this, and yes it was easy to follow for me. Thank you for posting this. It's exactly the kind of content I crave here on RUclips. I loved watching the dislocations move around during the plastic deformations.
With one year delay, I had the pleasure to watch your presentation. Congratulations, not only due to the work done, but also on the clear communication. I only managed to get a Master degree in radiation tolerant design for digital ICs, that never went this deep on crystal growth, and I was able to follow the whole presentation with good understanding. This could only be possible with a great communicator. Cheers and keep up with your very good work.
I haven't finished the whole video yet, but I've seen so far that you can explain these things that I could never understand in such simple ways. It really shows just how much you know about the topic. Just crazy.
You have to aim the meteor where the flying echo unit WILL be, not where they are.
@@AlphaPhoenixChannel you have to aim the meteor like 6 inches above where the echo unit will be
That really drew me in, far more than expected. Thankyou. This really got me thinking about the operational temperature range of integrated circuits. Hopefully we see some super low temp electronics for use in space exploration that don't need to expend a ton of power on heaters. Makes me regret choosing to take a practical trade path after school instead of university. I hope you keep making RUclips content, you're a great teacher.
Being an undergrad in materials science and planning to do my masters, getting to see this was so cool cause of not only how little attention materials science is given in media but also just knowing that a youtuber I watch is also into materials science.
Man, you really have a gift for explaining things! Even I, a bio-engineering dropout (20+ years ago) from Argentina, with a self-taught "English", was able to not only follow along, but to comprehend, learn, be amazed, and be thoroughly entertained!
This was just all kinds of awesome! Thanks a lot for sharing it, Brian!!!
As a biologist who never took more than the required amount of physics, I must reiterate what others have said - this was very approachable and understandable! Bravo and congratulations Dr. AlphaPhoenix!
As someone who did alright in General Chemistry in my first semester of college, I can safely say that I am in the demographic of "possibly interested but currently uneducated." I know very little about material science on my own, but the combination of watching your other videos on the topic and watching this meant that this was surprisingly easy to understand. You are a fantastic science communicator and your explanations were complex and detailed but stated in a way that an average science-interested audience member could understand. Thank you Dr. Haidet.
I followed all the way through and understood most of it I think, maybe not the more technical stuff but that never got in the way of the point you were making. It was fun to watch and cool to see a defense of a dissertation.
You are an excellent science communicator!
Congrats! Have watched for a while, this is probably the coolest video. You did a great job making this topic accessible to a general audience.
Loved the whole talk. Really awesome work! I am going into 4th year of a Physics PhD doing ARPES studying electronic structure of quantum materials, so any time I get to absorb knowledge from sample growers I take it! I love the idea of the first part of your thesis trying to be undergraduate level introduction - I might have to copy that!
Ooooh do you have any interest in pbsnse?
And yeah I put a lot of time into the methods section - because of Covid logistics and our professor switching schools there was approximately zero opportunity for knowledge transfer to the new batch of students. I hope my chapter helped at least a bit lol
@@AlphaPhoenixChannel I hadn’t heard about it until this, but the switchable dirac crossing is really interesting!
Loved the presentation. I spent most of my career in semiconductors (retired now) and never got tired of the endless set of material challenges. I wish you an exciting and eventful career.
I got the privilage to watch a friends masters defence/presentation on her work in forensic anthropology and my god, the questions they ask at the end are so hardcore
Kudos Brian. From one thin-film guy to another, you do an amazing job of communicating what it is that you do. Your presentation was fantastic and the channel really brings what is a foreign realm to many, into an understandable and fascinating story for all. It all speaks volumes about your fascination with the world around you. Thanks!
This felt really cool after watching a few of your past videos! It was almost living vicariously, I saw the image of the sample that was in the STEM and felt like I was involved it it even though all I did was watch a video. This was extremely cool and good work!
Haha, I know, like "Hey, I _know_ that sample!"
I had planned to just skip through and watch interesting parts. Tried that...but then found out the whole thing was wildly interesting and gave a great way to understand what you've been doing all this time with various 'stainless steel metal enclosures with varying amounts of vacuum in them'....if i were to typify the types of gear you've been talking us through throughout the years.
Seeing it so elegantly come to a single story, well-executed and greatly informative was a wonderful treat. Especially with your usual enthousiasm and ability to be bewondered by the realities of the physical world.
Thank you greatly for having taken us on this journey, not just by accident or necessity, but by choice and deliberate intent and beautifully executed at that.
I'm here cursing, this was fascinating as hell and now there's another thing I want to research further, despite the list being a lifetime long already lmao. Excellent summary, never lost sight of the talk with only an undergrad's level of understanding. And congratulations on the research and talk, they're both awesome!
As to your final comment, I'm not especially interested in this subject, I stuck around because I'm interested in everything! It's so fascinating to learn about our world and the technology and engineering that moves things forward. Thanks for sharing!
I love your intro - that should be a little extra video because it's such a concise explanation of how doctoral studies in the sciences go.
I also defended recently but forgot to press the record button for my defense -- oof.
Still watching, and just interested in *science*. Also you have a really good way of simplifying complex topics and making them accessible - at least accessible to someone of my level of understanding. I'm really glad you shared this!
Thank-you for sharing this. As an electrical engineer I use LEDs in my daily work, and getting a behind-the-scenes so-to-speak look at these cutting edge developments was captivating. Well done Sir!
the timelapse at 34:30 is so cool, it’s like watching a material zip itself back up after tearing
My interests lie in programming and computer science, not material science, but your presentation and its delivery were so excellent I ended up watching all of it - not that I understood all of - or even much of - what you said... Excellent work!
Fascinating talk, and interestingly some of this tied into my grad school memories of materials science but with a very different application. I'm an aerospace engineer, and this was a *fantastic* explanation for why we use single crystal turbines in jet engines - we really, really don't want them shearing or getting any permanent strain even at extreme loads at high temperatures, and this is nearly a perfect explanation for why the grain boundaries and dislocations create such a dramatic reduction in that capability.
Aside from that, this was a fascinating talk and I'm really glad you posted it here. I'll probably watch it another time or two before I really grasp some of the details of the most technical slides (and even then I'm sure all of this still is just an overview of what you really did), but this is all fascinating and you did a great job presenting it such that it's not omitting too much detail while still being somewhat approachable to at least a scientifically minded layperson (or in my case, someone with a masters but in only a vaguely tangentially related field).
Congrats on the PhD, Doctor!
(Also, wow that's a lot of pumps. I did some work in a plasma physics lab in undergrad, but the chamber I worked on just had a roughing pump and a turbomolecular pump, so far less fancy than your setup there. What kind of vacuum are you working with there? We never really needed lower than a few times 10^-8 torr or so, and the chamber wasn't huge, so that's all we ever really needed)
We could scrape into the -11s when the system was cold! I have a video about leak checking that system but have not yet made the video about pumping that I’ve been planning for years…
@@AlphaPhoenixChannel Nice, and yeah, we never dipped below the low 8s, maybe high 9s on a fully empty chamber if we left it alone for a while. I'd definitely be interested in more detail on your pumping setup, but I suspect I maybe have different video interests than the average youtube viewer?
Very well done sir! I do wish we could have heard the Q&A portion to see after such a great explanation what questions were asked. They are going to ask something to try and throw you off I’m sure, or probe your understanding as much as you probe the interface between the substrate and what your growing. Material science is such a core science for everything, who would not be interested to learn more, still amazes me after all this time on the planet, our understanding of the elements, that we can still come up with new better ways to make an existing process better/cheaper/easier, as well as still finding completely new uses of materials, or even new materials…
Thank you for sharing this!
A very good insight for an electronic engineer like me who is trying to grow large crystals of MoS2. Your presentation is butter smooth I wish if I can make something similar. Congratz!
You make me want to see a discussion about whether or not, and how if so, you applied the Matthews & Blakeslee model in your work -- or if you did.
Regardless, thanks so much for this.
It's a very rare gift you've given. :)
Ah yes you were right - this stuff went right over my head about 10 mins in!
But in all seriousness, the work you did was fascinating, thank you so much for sharing this, and I can't wait to continue watching your videos!!!
I just wish i had something intelligent to say about the actual dissertation xD
I would never have expected as a rising high schooler who specialized in linear algebra, trigonometry and calculus (and not at all chemistry) that I could legitimately understand crystal structures and semiconductors in the span of only an hour, but this video proved me wrong! Great job talking about lead selenide (which now I'm convinced is the key to extremely durable semiconductors) to an extremely diverse audience!!!
Your ability to explain these generally complex processes in a way that can be understood by those with no true education in molecular physics, such as myself, is astonishing. I watched the full defense of your dissertation and was extremely impressed. My interest was held through out without wavering. I hope to see more and more of your work in the future.
I am on the edge of deciding whether or not to pursue a PhD. I am a research based graduate student studying Aerospace engineering with a focus on autonomous systems. I do enjoy my research a lot and I enjoy to learn I would like to hear from those of you that have gotten a PhD or are working towards one for tips and things I should know. Thank you 😊, also very intriguing research man. Congrats Doctor🎉
I’ve been on the fence about applying to a masters in materials engineering for the last few months, but this has settled it for me. This is one of the most impressive pieces of science communication I have ever seen, and the fact that you did it under the pressure of a dissertation defence is mind blowing. It’s almost cathartic to see all of these concepts I’ve been struggling to learn over the last few years be effortlessly explained while also being expanded upon. I love that there are people like you in my niche little subsection of academia that are capable of work like this- it makes it feel a lot less lonely. Thank you for sharing :)
How dare you compare yourself to Doctor Alpha.... Apologize! RIGHT NOW!
As someone who studied semiconductor physics and worked on GaInNAs photonic devices, it was always a problem growing new materials of good quality. It is amazing how far we have come. When I was studying my PhD, GaN and blue leds were the holy-grail. Now any cheap plastic toy from China has one. Excellent talk.
Which side is a trace amount? Were you making wurtzite or zincblende? Isn’t it a REALLY huge bowing hit to the bandgap either way?
I'm not even remotely in the field of material science unless you consider computers to be a material, but that was one hell of a presentation. Not only did you explain everything in a way that I could understand a good chunk of it, you kept it interesting. Congratulations on... well everything. I'm genuinely quite excited to see what this research leads to.
I have next to no education in any of this yet I almost completely understood everything presented, and how it was achieved.
You did one hell of a job making this clear and easy to understand!
53:32 - I mean, it's not anything I plan to do much with in a direct way, but it's fascinating stuff. Nice presentation, Brian! I've kinda wondered what a PhD dissertation defense might look like... now I finally get to see one! So, cool! Thanks for sharing! I'm glad it turned out that you could. :)
This was great. I knew I'd watch the whole thing as soon as I saw it pop up. This is even better than Dr. Becky's dissertation video, as she pruned it down a little for RUclips while you gave us the whole meal deal.
Oh man I didn’t know she posted hers! I need to go take a look!
@@AlphaPhoenixChannel
Who can't love some black hole squelching? Let's go!
EDIT: I love the word squelching even more, as it's important in steel work, and I design something in steel most days. It's a kind of similar usage of the word, too, but in a massively disproportionate scale. Gotta love science...
Fascinating to watch you try to distill such a lot of work into a short presentation. Would it be possible for you to publish the Q&A? I'd be very interested to hear the sorts of questions asked of you by your peers.
I always wondered why InGaAs detectors for LiDAR were so difficult to manufacture, but this really shows the challenges to manufacturing these crystal structures. I appreciate you sharing this and helping me understand how these structures interact with one another.
Your genuine enthusiasm and love for the subject comes through in your presentation and made for a fascinating dive into a field that I knew nothing about.
Hey Brian, mad props to you buddy! I've stumbled upon your channel few weeks ago and I loved every video I watched! Congrats on the dissertation and on achieving your PhD! Seriously MAD PROPS!
Now we need to get you to at least 2^20 subs! I've already shared this one :)
My background is history but I felt very comfortable all the way through. Very interesting work and it was fun looking into the process and machines. It was really a pretty good story and progression.
It was 2 am when I started the video, and 3 am when I finished.
And I'm gonna be honest, after 30 minutes my eyes did start to fall, so it seems I'll have to rewatch a part of it..
Currently finished my first year of uni chem, and this is the kind of stuff that's extremely interesting to me. My GF likes everything science as well so this video will have another view soon :P.
Anyway, I definitely don't regret sacrificing my sleep for the content. If I have any additional comments I'll post an edit later I guess. Thanks for making the cool content and just being here, I know for a fact you are a great inspiration on future and current science peeps :P.
And the sponsor of my today's education is whiskey. I misread the title as "49 years in 5 minutes", then I couldn't stop watching, and I don't regret it as a new subscriber.
High quality sci-com here. I listen to a lot of science podcasts, and this is on par, or better, than most. Your enthusiasm for the subject is really apparent.
I feel privileged to have watched this. Thank you so much for sharing Brian.
Sorry. Doctor.
You did a great job! I've been a software engineer for over 20 years, but always had a passion for physics, and I love your channel.
34:50 Yes, this is in fact amazing O__O I know it's more of a representation than us seeing what actually happens, but it's equally useful given all the context you gave us before!!
EDIT: And wow the next bit about dislocations cancelling each other is indeed even more amazing!
It really gives you a new perspective on how lucrative research is and its impact on the overall study of the matter, thank you for uploading the entire defence Alpha!
This is highly accessible to anyone who even has a high school level of chemistry and physics, I understood all of what you have displayed and that's 100% down to your skill as a proficient scientific communicator, congratulations Dr Alpha Phoenix
You did a beautiful job explain your research. I was able to understand completely what you were trying to convey.
Thank you and congrats.
Awesome work man!! Awesome! Really glad you got to start that setup from the beginning and confirm days from the 90's! That in and of itself is amazing in so many levels and the research has VAST implications. Awesome 👌🤘🏻
I just finished up my freshman year going into this summer. Watching this video and hearing about the process you went through working on your doctorate makes me excited for what lies ahead. Seriously great video, I’ll definitely be reading some of your writing.
Good luck! what are you studying?
I only just realized how great this video's thumbnail is LOL
As an elecron microscopist in the semiconductor field who also finished graduate school in materials science last year, this was delightful!
Ja a a aaaammmmmessss ba a a axter
watched through the whole thing and it was very very interesting - and actually perfectly presented - even for a material science noob like me it was easy to follow and understand - and your enthusiasm is contagious.
i studied a few years of physics and physical engineering, but somehow always steered clear of the material science part of classes :D
while i'm here: i just recently stumbled upon your channel - have been devouring every video since!! you have a wonderful mixture of enthusiasm, knowledge, hands on experiments and presentation - it's amazing.
So i think your channel is way way underrated at this point - was delighted to see Veritasium mention you on that whole electric field discussion
Excellent presentation. You make me glad I'm not pursuing a PhD related to material science. I have my thesis defense for my Masters in Electrical Engineering coming up and it's great to see a quality presentation to base mine off of
This has to be the best video ever made to make someone go for a PhD in any field. Thank you for sharing! Love your channel!
Hi Brian,
yes, I sat thru all of the presentation, and found it very interesting.
Thanks!
This was phenomenal. A+! I'm about to do my defense on growth of TiNx and ZrNx for all sorts of their tunable optical properties and I'm very impressed! Congratulations on your graduation! Also I really like the mosaic crystallite image in your dissertation fig 2.14 and the phi-scan in fig 2.18
Thanks! And good luck!!!
How are you growing your films? I’m not even sure how refractory nitrides crystallize
@@AlphaPhoenixChannel Thanks! And I do reactive RF sputtering, when its high enough power and the conditions are right, the growth seems like its almost layer by layer (of mosaic polycrystals that have a nearly complete (111) texture) which is a cool result for sputtering. They're almost all rocksalt structure too so they play nice with lots of substrates. I'm actually very interested in water soluble substrate materials like BaF2, have you considered trying to dissolve these substrates after your growth and doing film transfer of your layers like a sort of van der waals epitaxy?
I am impressed by you and by myself, and that's because this is very interesting topic and due to the fact that I've watched the whole presentation despite only being a undergraduate student. Very hard to follow but great!
Thanks so much for sharing this! BTW I wouldn't classify 65k views as not popular! You have a great skill and talent for communicating this knowledge and I hope you continue to do that throughout your chosen career path. The world will benefit. I am a (lapsed) electronic engineer not too far from retirement but always enjoy learning about anything and everything. The fact that I (believe) I understood it all is testament to your capability! Thank you again.
I’m frankly flabbergasted this already has many more views than my eclipse video from like a month ago
I wish I had my defense recorded like this. Excellent job!
Thanks for sharing! Your experience as a YTer greatly shows in the overall quality of your presentation! Much appreciated 👍👍