What led me to this channel was a question I had, the s.e.m. was invented in 1965, my question was, who invented it, what company funded the work and, what years where the advances in this tech made and what company or other, funded those advancements?
How cool is it that somehow the magnetic lenses can focus those electrons in a beam to a small spot, even though they repel each other even inside the beam! I imagine the electrons must move fast enough (high enough momentum, and kinetic energy along with it) to counteract Coulomb repulsion
Mam your explanation is nice, but could you please reduce the size of face screen little bit less, because some part of the ppt slides covered with ur face screen,, tHANK YOU SO MUCH FOR THE GOOD EXPLANATION... @Tonya
What kinda differences would be there if I go for SEM testing of (1) cement paste i.e., cement plus water (2) mortar i.e., cement + water + sand, and (3) concrete i.e., cement + water + sand + gravels? Also let me know which case would be more appropriate in order to discuss the phase characterization of the products formed therein such as the main hydration products e., CSH (calcium silicate hydrate) and CH (calcium hydroxide). One more thing.....how can I assess the structures of either of these two hydration products in which case, I have to first dehydrate my samples prior to going for SEM testing (during the sample preparation stage)? So if dehydrated, there would be neither CSH nor CH in the prepared samples for SEM.
Great explanation, Wonderful teaching, I've learned SEM basics from here a very good starting point for me. Thank you Dr. Tonya. Great teaching.
Very nice and not dumbed down. You explain stuff well. Thank you!!!
Thank you so much, your explanation is really good and helpful!
What led me to this channel was a question I had, the s.e.m. was invented in 1965, my question was, who invented it, what company funded the work and, what years where the advances in this tech made and what company or other, funded those advancements?
Nicely explained Basic of SEM! Nice Teaching.
THANK YOU MA'AM FOR EXPLAINING THIS TOPIC IN A SIMPLE MANNER
Greatest tutorial intro ever
really good video and amazing explanation!!
Very good explanation. Thank you.
Good introduction. Really helpful.
How cool is it that somehow the magnetic lenses can focus those electrons in a beam to a small spot, even though they repel each other even inside the beam!
I imagine the electrons must move fast enough (high enough momentum, and kinetic energy along with it) to counteract Coulomb repulsion
Clear explanation, thank you.
Very well explained. Useful information, thank you so much !!
thanks a lot kilani
Amazing lecture
thank you.
She's the real deal.
nice explanation, thank you :)
Mam your explanation is nice, but could you please reduce the size of face screen little bit less, because some part of the ppt slides covered with ur face screen,, tHANK YOU SO MUCH FOR THE GOOD EXPLANATION... @Tonya
Amazing lecture, thank you
Thank you very much! Exactly what I need :)
Thank you mam.... It's very helpful....
Great video, thank you so much!!
☺thank you
Thank you so much! that's very helpful.
nicely explained
love u girl, great explanation
Thank you
What kinda differences would be there if I go for SEM testing of (1) cement paste i.e., cement plus water (2) mortar i.e., cement + water + sand, and (3) concrete i.e., cement + water + sand + gravels? Also let me know which case would be more appropriate in order to discuss the phase characterization of the products formed therein such as the main hydration products e., CSH (calcium silicate hydrate) and CH (calcium hydroxide).
One more thing.....how can I assess the structures of either of these two hydration products in which case, I have to first dehydrate my samples prior to going for SEM testing (during the sample preparation stage)? So if dehydrated, there would be neither CSH nor CH in the prepared samples for SEM.
Same intrest ...
Same intrest ...i just had the images of mortar samples but its difficult to inerpret ..i am a student and not familiar with SEM
Which book is it that you mentioned? For SEM read.
Wow...
Thanx a lot ma'am. Really really helpful and lucid. Can we get the copy of ppt as well ma'am? Since some images were nt much clear in labelling.
nice lecture please i want the linc of slides of this seminar or video
really helpful
please tell how to do sem and tem on gfrp composite material detailed analysis.thanks in advance.
thank you so much Madam
Is there a link to the slides?
Could you provide us the slides?
thank you so much, please can u send us the ppt file
#Tonya Coffey
Vacuum might not be so good for the pen if you put it in there :p
Get a really amazing image of ink splattered all over your beautiful instrument
If no airbubbles in the ink nothing will happen....
What is the book that is referred to?
scanning electron microscopy and x-ray analysis by Goldstein et al
Tonya Coffey thank you! Excellent tutorial by the way!👍
Fantastic explanation, but you go a bit fast to follow
The nice thing about RUclips. Pause me whenever you like! Can't do that in a classroom.
i think her pace is perfect to follow .....lol