Great lecture. The distance from the tip to the sample surface represents the thickness of the "potential well" described in a quantum mechanical treatment of the system must be of magnitude of the wavelength of the electron incident on that barrier. This technique is so remarkable, and is indeed deserving of a Nobel Prize.
Thank you. I am working on my PhD at the University of South Africa, where I am studying the forensic science literacy of people who work in the American criminal justice system. I have understood this material since the late 1980s, but needed a simpler explanation to work with attorneys and judges, etc.
As was pointed out, the current flow is directly proportional to the applied voltage. However, you said the applied voltage and current change indirectly. I~V * exp(-cd); Where: (C) is the constant, and (d) is the distance between the sample and the prob.
very nice explanation, but for those who want some more details like me, tell us more about the structure of stm and about probe how it is prepares and manipulation in atomic positioning. and also about other spm like atomic force micrscope and other. Thank you though for this video.
It’s a great video thank you , it helped me understand how the technology works But I don’t get how it represents quantum tunneling. It doesn’t measure or calculate the probability of a wave tunneling through a barrier. They actively transfer electron as a particle between two surfaces and measure how current changes based on the difference between the distance between the sample surface and the tip
In short words scanning tunneling microscope is an advanced microscope that allows us to see tiny discrete particles in matter.the STM has a sharp pointed probe which acts likes a sensitive finger.when the probe runs back and forth it detects the Roughness of the surface very accurately and hence allows the position of the particles to be visualised
As was pointed out, the current flow is directly proportional to the applied voltage. Another point at 11:55 which should be opposite: "By convention, a positive V means that electrons in the tip tunnel into empty states in the sample; for a negative bias, electrons tunnel out of occupied states in the sample into the tip" (Introduction to Scanning Tunneling Microscopy. Oxford University Press. ISBN 978-0-19-507150-4 )
Great lecture. The distance from the tip to the sample surface represents the thickness of the "potential well" described in a quantum mechanical treatment of the system must be of magnitude of the wavelength of the electron incident on that barrier. This technique is so remarkable, and is indeed deserving of a Nobel Prize.
they did win a Nobel prize
If u have more knowledge regarding this ... Then plz make video on this topic
Thank you. I am working on my PhD at the University of South Africa, where I am studying the forensic science literacy of people who work in the American criminal justice system. I have understood this material since the late 1980s, but needed a simpler explanation to work with attorneys and judges, etc.
Tommmrow is my sem exam and this video helps me to understand the concept thanks a lot after 6 years also this video is amazing thanks a lot 🙏❤️
Thank you so much for appreciating my efforts
Not after 6 years but after 8 year it is useful though😅
This video has helped me with my Dalton Matter Assignment in Year 9
Indians are the best teachers on TH-cam
Thank you so much for appreciating my efforts
This video is a lifesaver! Thanks a ton.
P.S. You're awesome for keeping up with comments even now
Thank you so much for appreciating my efforts
simply, you are the best teacher.... thankyou.
Good lecture..Explanation was Clear and Proficient..
Thank you
U r d wordy gold of society sir.
Thanks, Shomu. Nice job of explaining with clarity, enthusiam, and colorful graphics.
Glad to hear that you're getting benefit from my lectures
The explanation is amazing! Thank you very much for uploading this. It is very helpful.
You're welcome. Glad to hear that you're getting benefit from my lectures
Thanks for this amazing lecture:)
You're welcome
mind blowing explanation........very good.....keep it up
u hv explaind it in an epic manner
+Sachin Bojraj thank you very much
I like this video and simple to understanding the stm working method ......thank a lot
Brilliant Explanation sir!!!!!Cystal Clear!!!!!❤
Thank you so much for appreciating my efforts
Excellent explanation sir...please gives video for HVEM microscopy
Amazing explanation
Thank you
very nice and clear explanation of STM
Thank you sir your explanation was excellent
You're welcome. Glad to hear that you're getting benefit from my lectures
Thanks. That was very well presented and very well explained.
Thank you
Superb explanation. easy to remember
Thank you
bhai kal paper h... kahin se smjh ni aara tha,.....tune shi kra diya bhai ye topic
Super explanation 💯
Thank you so much for appreciating my efforts
Thankyou. You have excellent teaching skills
+IJLAL KHAN thank you. Glad you liked my lectures
Best explanation on this topic
You're welcome
thanks for the video... very nicely explained 🙏
You're welcome
Concept presented very nicely.Looking forward for more lectures.
Here is the smart guy!! Love from an IITian
Thank you
This explanation is so much better than my professor's.... Thanks!
+Ng Zheng Nian you're welcome
Thank you so much...it helped me to understand STM more clearly!
Thank you. Glad you liked my lectures
Great explanation! Helped me to better understand this subject, thank you
Glad it helped
What do you do?
Superb sir....
You're welcome
Best explanation yet. Good job.
+TheTwick thank you. Glad you liked my lectures
Very good explanation , Great Sir.
Youre welcome
Thank you so much Sir!!
You're welcome
Excellent lecture...
Wow Amazing.... Now i can understand the principle and working of STM ....., "THANKYOU"
Excellent lecture. Clearly explained and very articulate.
Worth Watching the video. Good explanation.
Well explained 👏
thanks alot. so much better than my teacher.
Before 1 day of exam i was viewed this video....and It is vry helpful to remembered all in exam..
Osum lecture dude.... Understand it very well thnx for video it helped me a lot tommorow dere is my xam
Glad it helped. Please share and subscribe
very good explanation ,I learned a lot from it
Excellent teaching ....thanks for make me understand about STM
+sameer shah glad it helped. Youre welcome
Excellent description of STM. It helped me a lot.
thanks for the video. ..it made STM simple for me
Very good lecture sir thank u
You're welcome
wow great it help me understand
U explained pretty nice 👍 thanks
Super explanation
shaikzameel basha999 hui
Best explanation
super explanation!!!!
It is a helpful for leaners.
Nice video 🙌🙌
You're welcome
Very nice u explained the topic so beautifully 👏keep it up sir
Thank you. Glad it helped
Good one
Nicely explained boss
thank you sir for such a good explanation of this topic really helped me to understand it.
Thanku so much sir. It helped me a lot.
good presentation of STM it helped me alot. thanks
Thank you so much sir...it helps a lot
You're welcome
As was pointed out, the current flow is directly proportional to the applied voltage. However, you said the applied voltage and current change indirectly.
I~V * exp(-cd);
Where: (C) is the constant, and (d) is the distance between the sample and the prob.
thanks for the video...easy understanding of the concept.
I am watching this in 2024....
These are fundamental concepts hence no time boundary
awesome lecture
vey nice explanation
very lucid explanation...Thank you Sir..!
Nice i can understand now 🙏🙏🙏
You're welcome
I have to words: Thank you!
You're welcome
awesome explanation.stay blessed
Tqsm very much helpful
Thank you
Beatiful lecture
Thank u so much for this clear explanation sir..
Its helpful 👏👏
Thank you. Glad you liked my lectures
Very good
very nice explanation, but for those who want some more details like me, tell us more about the structure of stm and about probe how it is prepares and manipulation in atomic positioning. and also about other spm like atomic force micrscope and other. Thank you though for this video.
Very good its really helpful , thank you so much
+Usama Al Jassim glad you liked it. Please subscribe and share
thanks for detailed explanation.
Insanely wonderful ecplanation!💕
Dope sir I love the way you explained sit thank youuuu
Thank you
thanks this vdo is very useful
It’s a great video thank you , it helped me understand how the technology works
But I don’t get how it represents quantum tunneling.
It doesn’t measure or calculate the probability of a wave tunneling through a barrier.
They actively transfer electron as a particle between two surfaces and measure how current changes based on the difference between the distance between the sample surface and the tip
Excellent
Really good
Well done man!
Nice lecture
You're welcome
Thank you sir
You're welcome
sir,very nice explanation :)
Excellent explanation!! Maybe more information about STM, the piezoelectric effect and the feedback loop would be great!
very good explanation you make it looks easier and makes more sense to me. but do you have idea about the deference between STM and STS ?
thanks, you just saved my a level grade
lmao same, good luck today
You do STM at A Level?? What board are you on? I didn't do this till my first year of Physics at university (and for most of my course second year)
AQA Unit 5 Option D! Not everyone would have done it!
That's some advanced stuff, good job in understanding in it, hope your A levels go well
Evultz Thanks, I ended up with A*AB, The B being in Physics annoyingly. STM didn't come up in our exam this year which was annoying
good explaination
+yasir iqbal thank you. Glad you liked my lectures
In short words scanning tunneling microscope is an advanced microscope that allows us to see tiny discrete particles in matter.the STM has a sharp pointed probe which acts likes a sensitive finger.when the probe runs back and forth it detects the Roughness of the surface very accurately and hence allows the position of the particles to be visualised
Very good explanation!
As was pointed out, the current flow is directly proportional to the applied voltage. Another point at 11:55 which should be opposite: "By convention, a positive V means that electrons in the tip tunnel into empty states in the sample; for a negative bias, electrons tunnel out of occupied states in the sample into the tip" (Introduction to Scanning Tunneling Microscopy. Oxford University Press. ISBN 978-0-19-507150-4 )
Thank u sir ......👍👍👍
The images from your last slide were actually SEM images. STM typically can only get images of a few nm wide.
Thanks.
You're welcome
its out standing
You're welcome