Making ZnS:Cu, a green phosphorescent material
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- Опубликовано: 1 фев 2019
- Phosphors are used in Cathode Ray Tubes (CRT), Vacuum Fluorescent Displays (VFD), glow in the dark paint and other applications.
This video shows the synthesis of ZnS:Cu, a green phosphor based on Zinc Sulfide.
References:
W. Yen, M. Weber, "Inorganic Phosphors", CRC press 
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Got featured in a NileRed video! ruclips.net/video/OfI-XpYAqM0/видео.html
Good tutorial. Looking forward for your next video mate.
Thank you for the interesting video. I always wondered how copper doping could be achieved at home to make green phosphor. I'm definitely going to watch the next video in the series.
The series is currently on hold as I failed to make a red phosphorescent material, and then moved to doing other stuff. Would like to get back to it someday, though.
Helpful video
Awesome
5:21 what !!!! Interesting
Is this process similar to making/growing a scintillation crystal?
If you mixed the doped zinc sulfide with an optically clear hardening resin would that work as a scintillation crystal?
I had to look up on Wikipedia about scintillation crystals, and the page lists ZnS:Ag as an option, which is very similar to the ZnS:Cu I synthesized. Maybe it could work, but I don't know for sure.
@@hydrogentime2872 Thanks for the reply. I've been interested in figuring out how to grow plastic scintillation crystals in a home lab environment but I'm just a hobbyist and no chemist. I appreciate you posting this video. I plan to try your synthesis method, currently just waiting on a copper sulfate.
Since watching your video I experimented with mixing of ZnS:Ag:Cu with a clear casting resin. My plan is too attach this to a photomultiplier to see if will work as a scintilator for alpha/gamma decay.
@@greengrowlocks566 Keep in mind that this kind of phosphor material is opaque to light, so what you're making will probably be more like a fluoroscopic screen than a scintillation crystal.
Also you'll likely need to recrystallize your copper sulfate and ammonium chloride at least once to get them pure enough to work.
@@greengrowlocks566 a few issues you may incounter if you have not aready attempted and or encountered. Not only is ZnS rather opaque but it has a rather low efficiency to gamma radiation, it maybe sensitive to Xray but only to a degree.
I would imagine you may encounter issues keeping the ZnS suspended, although in a thin sheet it may have uses if this works out.
Also copper dopped ZnS has a long decay time compared to silver dopped.
Now the question if you dope it with Eu will it be more efficient to Xrays. Also using Lithium 6 will cause it to be sensitive to thermal neutrons.
Thanks for the detailed video, we are making this today in my physics university class. Please could you let us know if there is a way to make the ZnS:Cu into a paste/liquid to make it stick to the bottom of a glass conical flask to form a phosphorescent screen (without dripping down the sides if it is moved around). We are making a DIY cathode ray tube :)
Chapter 5 of the book Inorganic Phosphors lists some methods. You can find the book in this thread www.sciencemadness.org/whisper/viewthread.php?tid=142184&page=2
@@hydrogentime2872 Thank you !
@@hydrogentime2872 sir thank you so much for making this love you so much plz one question
Sir i made zinc sulphide with
NA2S+ZNSO4= NASO4+ZNS
CAN I USE IT TO MAKE GLOWING POWDER PLZ TELL SIR
@@urprogamerz6994 assuming you made zinc sulfide, yes, you can make glow powder if you follow the process described in the video. You will need to add a tiny amount of copper sulfate and ammonium chloride, and heat the powder in a furnace.
If you put the zinc sulfide in plant soil will the plant absorb the nutrients and glow?
Zinc sulfide is not soluble in water, so I don't think a plant will be able to absorb it
Dose this also work for cadmium sulfide doping? I'm working on recreating no longer available phosphors used in in hold electron microscope screens.
The book I reference, "Inorganic phosphors", details many CdS phosphors preparations, with similar conditions. So it will work, but I do not recommend it as cadmium is toxic and you'll be working with fine CdS dust, which I believe poses an inhalation hazard.
@@hydrogentime2872 in comparison to other chemicals i work with on a usual basis, that seems downright safe.
i work with mercury, mercury salts, uranium salts and osmium tetroxide, among other things.
Thanks for the info, and the book suggestions, i shall read it as well.
Hi, I've read tens of documents, it's quit hard to find any concentration of Cu needed for electroluminescent ZnS. Do you have any idea ? (In wt% or mol%)
Unfortunately I haven't yet been able to make my phosphor electroluminesce, for now I only had success using UV light as excitation method. I don't think it's the wrong copper concentration that's preventing electroluminescence, though.
Anyway, for the phosphor in this video I had a look at my lab notebook, here's what I used
ZnS: 5.13e-3 mol (0.5g)
CuSO4: 1.54e-6 mol
NH4Cl: 257e-6 mol
So, the CuSO4 is 0.03% mol
@@hydrogentime2872 I'm currently building a tube furnace, I'll see if i can get my phosphore electroluminescent
Any updates? I'm glad someone is on the same track
257e-6 looks odd. Usually there's only one digit left of the decimal place. Is that supposed to be 2.57e-6?
Lo he sintetizado también con S+Zn+Cu2Cl en una reacción exotérmica bastante grande....
There are reports online that it will work but the results are more hit or miss, sometimes it does not work at all, sometimes the quality of the product is not that good. Maybe it's just because people tried with not pure enough reagents, though.
Is it also a Electro luminance which is use in EL Wire ? Can i glow it with 100 volt ac electricity supply ?
So i can use It as an electro luminance material if I follow this tutorial?
I'm still trying to make ZnS work as an electroluminescent material, but I haven't succeeded yet.
@@hydrogentime2872 it may help www.semanticscholar.org/paper/Materials-for-Powder-Based-AC-Electroluminescence-Bredol-Dieckhoff/b3e97bd8cd4fc691f399944c33980ecaa54f8d4a
@@hydrogentime2872 www.researchgate.net/publication/260303341_AC_Powder_Electroluminescent_Displays
@@omsingharjit Interesting papers, will have a read!
👏
Why is a quartz tube required to dope the zinc sulfide?
All other types of glass, including borosilicate, will melt way before the desired temperature is reached.
Does zinc sulfide without doping still glow?
No, I have tried shining UV light on the raw zinc sulfide, it does not glow.
@@hydrogentime2872 Sir, How to dope ZnS by Cu, all methods I have searched are chemical bath deposition. Can you please suggest how to dope ZnS powder by Cu? Thank you
@@entertainwithzeshan6189 The method I used can be found in this book: Inorganic phosphors www.sciencemadness.org/whisper/files.php?pid=654604&aid=86683
Alguém aqui pelo QR code das palavras cruzadas ?
Eu nesse exato momento rsrs
Thought you were an Indian guy hearing your accent, dude.
Voice is not good, clear.