DIY Scanning Electron Microscope - Overview
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- čas přidán 21. 08. 2024
- Today, I finally produced an image with my DIY scanning electron microscope. I've spent the last few months working on this project, and am encouraged by today's success. There is still a lot of work left to do in making the image higher resolution, and eliminating sources of noise, however this image proves that all parts of the microscope are operating as designed.
I will be showing this project at Maker Faire 2011 in San Mateo. Come see it for yourself in person!
benkrasnow.blog...
Search my blog for "microscope" for additional images and info:
benkrasnow.blog...
I cannot even imagine one person can actually build a precision machine like this. You are a GENIUS and incredibly awesome. RESPECT.
Think about that there were persons in the beginning that did this before without the information we have now at disposal like the one that conceived it von Ardenne.
Yep, I didn't find a better channel about science than this one here. This guys is a pro and he's very generous to share all this with us.
If someone knows a better science channel, you can tell me but I seriously doubt there is.
Ok... See you next time... Bye...
Reth Tard look up Nile Red if you enjoy these!
@@Reth_Hard Science Asylum ! But it's more about theories and how stuff works, while Applied Science, is more... applied ? :D
@@AA-gl1dr Too late, I'm already a sub... :P
I mean seriously... this fucking guy... the things he does as a hobby.
Yep, they're amazing! This is a very informative channel.
Just built this electron scanning microscope from things lying around in my garage.
Yeah everyone with a garage can say that.
here in my garage...
KNAWLIDGE
"Here with my delorean, i read a datasheet a day, KNAWLIDGE"
I couldn't control my excitement when somewhere in the video I understood how a scanning electron microscope works and it is much simpler than I thought or maybe you explained it so beautifully that it seems simple. I can understand how excited you are in the video. Great work.
Same for me, I got so exited just that I could finaly understand how they work, and that it's so simple (yet complicated) that someone with the right knoledge and tech could build one.
A great explanation can make complex things simple, it's what explainations do and yes indeed he explained it very well
It seems to be just like light but with electrons. You blast a bunch of electrons somewhere (playing the role of the sun or any light source) and then you have another little device (playing the role of the eye) that looks at the patterns of how the electrons bounce off.
I have a degree in materials science and I have seen SEM a lot many times I used to get really excited but this , i mean THIS SETUP , man I have lived my life I guess
Wow Ben, I can't believe you've been at it on this channel for over 10 years! All I can say is thank you so much. You've helped make learning interesting again after I dropped out of college for engineering. You've helped me more than I could ever describe here. Please keep making amazing videos. You're a rock star dude!
Holy crap, yeah. I remember watching this series when it came out, and I could almost swear it was only 3-4 years ago. Man... where does the time go? I don't wanna be one of those old sounding guys, but it really DOES go by a lot faster as you age. Scary fast, sometimes. I feel like I blink and suddenly 4 years have gone by like a month would. And I'm only 38. At this rate, the last year of my life will probably feel like a week. So it goes.
I love the spark-plugs, what a great use of such a simple object and it suits the purpose perfectly. wonderful engineering overall!
This is so amazing! I wish for a SEM, but pre-built would cost me grands and I'm just a curious little college kid on financial aid. Luckily, I have a friend who's a soon to be engineer whom may be able to help me. I've been looking for patents with as clear as possible instructions. You're amazing!
The discipline, energy and time needed in order to attempt a project of this magnitude is exceptional. I have certainly enjoyed your video and look forward to more posts in the future.
0:23 "I've had some of these parts in my garage..." 9:07 yeah, everyone has this stuff laying about, brilliant :)
I've probably said this before, but you explain things so well into the detail but not too much, not repeating, and I don't have to skip back a second to really understand what's going on, it's all clear from the first play. That is really amazing. This is the first time I see this project and the video is 5 years old, but my first ideas for improving the image quality is to use shielded wires, so they deliver only the voltage that comes from the generators, no crosstalk. And of course, as CRTs are affected by the magnetic fields, so must this be. More shielding if there are changing magnetic fields. But this must have been already done. Great work!
I am an undergraduate physics student but so much in love with computers and physics and science !! I think I am going to try to do this project at the very least I would get way more knowledge then what I will ever expect!! It is coool really so expect me to ask you some questions, your channel is woooow you won't believe how much did you contribute to people but really keep it up
Never thought of a DIY electron scanning microscope... Awesome
You are totally inspiring. We're about to buy our first decent microscope for the kids home schooling and my son and I were talking about how cool it would be to have our own electron microscope as a joke until we saw you vid. He's about to turn 10 and this stuff has facinated him since b4 he could talk. Well done. I can't wait to see more.
One of the coolest things I've seen in a long time.
Thanks for the fast reply. I'm a noob to youtube :^) but slowly getting the hang of things. I did check out your other videos, and must say.... Very impressive! You, and a few others have inspired me to try some videos of my own.
From "pop rocks" to "electron microscopes"...... Now that's diversified! Great stuff.
Take care.
Wow, and the rest is history!
What would we do without Applied Sci & Carlson? Keep the videos coming!
What an historic comment to stumble across 5 years later.
Same here !
@@-allround- Ditto! Silly me never thought to look for something like this.
Next build is a particle accelerator right?😁
Azim Alif He could do it in an hour.
He did, multiple times
I don’t know wether or not he has done the fusion reactor yet.
Well isnt this microscope an electron accelerator?
Pablo Pérez Herrero yes. His magnetron sputtering device is one, too.
DUDE... this.. we are mere mortals in your presence.
Also, I'm amazed at how precisely and coherently you can speak about this, you're a very intelligent speaker.
Where did you start? With gaining all this knowledge I mean.. I'm incredibly impressed, and curious as to how one could become this capable
Thanks! I really appreciate it. Some of my training comes from my mechanical engineering studies at UCSB. Most of my training comes from finding information on the internet, testing things in my own shop, and running my own prototyping business. Check my LinkedIn profile for details.
Applied Science Oh no problem man, you're an amazing human being. Stay curious!
Applied Science
I worked for Cambridge Scientific Instuments as a service engineer for many years
who made the worlds first commercial SEM, Did you make your own filaments, or did you buy them, and is the beam deflection electrostatic? Good luck with the fine tuning.
Peter May
I bought a box of commercial filaments on eBay because they were very inexpensive, and having very regular, exactly sized filaments made replacement easy (instead of adjusting each bent piece of wire). This device is entirely electrostatic -- no magnetics at all except for the permanent steering magnets to compensate for a not-aligned column.
Applied Science what did is cost for you to make this?
Nicely done! Probably one of the best DIY projects I've ever seen.
You sir, are a credit to the species! Amazing work you've done! You must make your parents very very proud!
I can't understand how there are any dislikes on this video. It's such a cool project!
Made a scanning electron microscope at home? That is Bad To The Bone!
Super. Many viewers (as myself) fall asleep building these sort of things in head but lack the time / money to follow through. Can't do everything. Appreciate your work and videoing, answering questions we ask ourselves.
You really deserve to be admired, good sir!
I take off my geek and science hats for you. You are absolutely amazing.
Here' why your work is really inspiring to me: For some time, I've thought that envelope-pushing research had moved from the realm of the private hobbyists of an earlier time (Franklin, Faraday, et. al.) to the realm of large, well funded universities and corporations, since the cost of research components was too prohibitive. You have proven me wrong, and so have greatly inspired me.
Can't even Imagine the amount of knowledge that would have gone into this project. Respect !!!
I love the spark plug feed thru's
Oh hey Jeri, big fan
Brilliant aren't they!
😍
😍
awesome. unbelievable. I have a BSEE and worked for HP...many years and exposed to high-end devo environments - even many contractors at K Space Center. that you did this in a few months? wow.it will inspire many.
Holy crap dude, I had no idea an SEM was anywhere in the possible range of a DIY effort. Very impressive work. Subbed.
I don't even know what I would use it for, but I do know that I've always wanted one. Lo and behlod, here is one you built in your garage!!! I'm speachless...
You are a genius, sir. No doubts or discussion needed on that. Congratulations on building such an amazing machine!
This is absolutely fantastic stuff, you ought to have your own TV show.
You explain complicated subjects very eloquently.
Who the hell "dislikes" this video?
Great video, thanks for taking the time to share this with us.
Man u motivate me to never give up on my projects.
Good question. The phosphor/PMT allows the use of 10KV to accelerate secondary electrons, while not requiring the PMT anode to be 10KV above ground. This provides a DC signal path from secondaries to final output without voltage shifting or isolated supplies. Modern machines still use this method to measure secondary emission. Backscattered electrons are collected directly, since their energies are much higher. I have some electron multipliers that I would like to test with an isolated amp.
Give your self a big pat on the back . I built an oscilloscope from junk years ago, but "That piece of equipment " is some achievement .Well Done. I have subscribed to see where you go with this project.
wow! I couldn't believe that some one can build a electron scan microscope at home.
pretty amazing!
nice work! thanks 👍👌
everything starts like this then the rest is perfection
+THUNDERBOLT true 👍
BRAVO!!! This is the most impressive DIY I have ever seen!! LOVE IT!!!
A superb piece of science/engineering. I was surprised that the detector did not simply pick up secondary electrons and amplify them with an electron multiplier. This was used with the Farnsworth tube. I suppose the optical detector is more sensitive due to the high accelerating voltage.
You have to admire this level of work, just brilliant.
I understand the principle of the scanning electron microscope but it goes beyond my knowledge to ask detailed questions about it like you say in the end.
Well done man and I admire your technical skills and understanding how to built it.
I was literally thinking this about 2 days ago, that a technician working on carbon allotropes could likely build their own electron microscope to verify resultant carbon formations. And just now this very video pops up on my YT feed. Fantastic!! :D
You are a geeenius.. Genius is not enough to define you. You are inspiration for every science geek. I would love to know how you get inspired and how you get ideas and materials and tools.
Impressive! From the e.microscope itself to the solution for oil vapours, my hat down to you!
I feel inadequate as a human being now.. MOST IMPRESSIVE youtube video ever !!
Cool to know I am not the only one thinking of a DIY electron microscope. 30 years have gone by, and I haven't got to it yet.
But then again, I have wanted to build a motorized go kart since I was 8 years old...haven't got to that either.....I was 8 in 1970
This is exactly the level of food my brain requires. Finding your Channel is my favorite thing about 2019 so far.
There should be a documentary about your life. You are a very interesting person. And you seem genuinely nice.
Absolutely mind boggling! You should be working at MIT fixing their high tech gear! If you were my science teacher, we'd be racking up nobel prizes together! You are an inspiration!
This is insane bro, you take the diy to the next level
Nice and simple explanation of how EMs work, a very complex topic boiled down so someone like me who has very little knowledge of E scopes; a good place to dip in the toe. I would be interested seeing your prints and schematics.
Thanks for sharing your scope.
God dam that's cool! I've learnt more in one video about how an electron microscope works than a whole semester of study at uni. Great work!
This has got to be the most worth while use of the internet. Ever.
great job,sir...this is really inspiring.I cant believe you did all those things yourself.
And i have been struggling with making my led strip work! Dude you are beyond genius
when i started this video i thought, awesome! a high tech DIY project and now that i've watched it i can only sit and marvel at the level of DIY some people are capable of. amazing. keep at it
Hey man. Iv'e been working @ a professional Transmission Electron Microscope service, restoration and sales company.
I don't know much about them but am slowly learning.
Fascinating stuff!
Thank you for this great video!
Wow! You accomplished such herculean task. Much respect Sir. 🙇
Well Done! I see this was 10 years ago. Now, off to see what the final results looked like...
Wow; an inspiration for those of us who thought that stuff was in the realms of professional labs and workshops only.
Please keep making more videos!
Fantastic work! This has to be the ultimate achievement in DIY projects.
Wow. As a liberal arts major I have no where near the level of knowledge of physics to be able to understand everything that must have gone into this, but I have a rough idea and I have to say I am very impressed. This kind of project requires dedication and passion that is rare.
Also if I had professors that explained things as well as you I might have considered taking more physics courses. Thanks for making this video. I'm looking forward to watching the next one.
Stumbled across this vid learning how to use a new optical microscope I purchased for my boy. He asks if we could build an electron microscope too. I said it's possible because we do have some extra spark plugs on the shelf in the garage but maybe we should learn how to use this microscope first.. Nice work and explanation of how it works!
One of the best videos on youtube.
Excellent work.
Don't you just LOVE using something you've been hanging on to for ten years or so? It's like, alright, that totally wasn't a waste of effort.
cool project, glad to see there are still real people doing, real science at home. To simple say, I wonder if I can do that, and then set out to do it.Congrats.
Looks like what you have now is a scanning electron spectroscopy tool. Without a few improvements, your microscopy will be limited. You should add several stages of positive electrical field lenses for refinement. You aught to get a better pump, like a turbomolecular pump for second-stage pump down. You need to bake out (heat up) your chamber to dislodge 'stuck' air particles from all components in the chamber. I work with a condensed matter research group, if you want advice, I'm here.
Your channel is wonderful. Your videos are very interesting and well done. Thank you so much for sharing your knowledge. People like you make this world a better place to live.
I would greatly enjoy a more detailed tutorial on each component of the instrument.
Out of terrible early educational experiences, partially caused by my ADHD, which at the time was considered a mixture of low IQ and a lack of respect for authority, I graduated from high school with average grades and little in the way of math (algebra and geometry) and my science was limited to biology and chemistry. While I finished some college, my inability to concentrate and my political activism were a bad match for serious scholarship.
In any event, after twenty years as successful builder, out of utter boredom I returned to college. Testing uncovered two standard deviations between my verbal and performance scores and the University helped me ameliorate most of the ADHD. In any event, I completed my bachelors and masters in three years, graduated summa cum laude, finished a doctorate and my thrist for knowledge grows as I learn advanced math and science.
Your electron scanning microscope sounds like a very challenging project and I would greatly appreciate more detailed videos on the instrument.
BTW, I.can register for almost any graduate class free of charge, but none them teach your level of applied science. Athough MIT has many fantastic online courses, the lumbering classroom pedagogy and lack of interaction with students and faculty leave much to desired.
Sorry about the long text.
This is one of the best things I've seen on youtube.
What an inspiration. The sticking with it is awe inspiring. Thank you for making videos for us.
Woahh this is why the internet was invented... your videos are the best
Its even more amazing that u did this in a few months on a weekend basis. Very nice. I'm looking forward to the following videos. As much detail as you can would be great.
The highest accelerating voltage is 10KV, and I normally run the SEM at under 5KV. The x-rays produced by this acceleration are so low-energy that essentially none will be able to penetrate the glass and aluminum chamber. This is why black-and-white TVs did not need lead shielding. Color TVs used 25KV+ voltages, and then became an X-ray hazard, requiring lead glass.
Man that is so cool that you have just about all of this at home great work
Got here from the Amp Hour, how did I not know about your videos before? Top stuff all together! Loving this series, great explanation :)
Outstanding achievement! Incredibly well done, and beautifully explained. Thanks for sharing!
Good Work, Ben. - I see you are VERY active in both academic science, and in the "Hands-on" technological, practical side of applying constructional and experimenting skills to real-life scientific problems.I envy you your interesting work situation.
I remember from doing hobby electronics that the electron guns in TV cathode ray tubes were not aimed directly at the target, i.e. the screen phosphor, but slightly off to one side, the [light] electron beam being shifted back to the required direction by a small, adjustable "Ion trap" magnet clamped to the glass neck of the tube body, leaving much heavier ions contaminating the beam to carry straight on to impact on a metal target so that they could not damage the screen phosphors. Is this relevant to your electron gun?
Also, a good, cheap source of Tungsten wire would be TIG welding plasma arc tungstens, though some of these are deliberately doped with Thorium to help with welding certain metals, and this might be a source of such heavy, high-energy ions in the beam.
Looking forward to seeing more of your fascinating output on CZcams. - Many Thanks. from Tony Boyle.
Awesome video. I love the story your laugh tells near the end sharing the rough timeline of the project!
You rock!
This is totally awesome. I'm very impressed with the elegant design and clear presentation. And that you actually got an image is just amazing. Keep up the good work!
You, sir, are a badass. What an incredible project. Please post more videos.
OMG this is one of the coolest things I have ever seen! Good for you great job! Thanks for sharing this with us! I remember when I first heard of an Electron microscope and heard that they cost serval million dollars (probably in the late 70's or early 80's). If someone told me that a scant 30 years later someone could make there own SEM and operate it safely at home I would not have believed it.
Really this is very very cool and I am green with envy.
One hell of a DIY project Ben.. Love all your vids..
Ivan
I am awe struck, I used to think that if someone could do something than so could I. But now I am not sure of that statement. I will be watching closely. One technical question for you. How hard of a vacuum do you need to pull? Thank you very much for your efforts to let us look in on this fascinating project. I am wondering if with the advance in tech, could something be built with reduced complexity?
+Bart Zudell Hi Vac needs basically to stages the first being a rough vacuum say 10-2 mbar then hi vac we liked to get to 10-10mbar ya basically got to suck out all the are then use a turbo pump or diff pump to move into what's called molecular pumping well ion pumps are cool too and nice and simple
i thought “here is a project that i would like to work on”, after seeing the hole video i got to the conclusion that there is no way i can fly to moon
dude, you're an inspiration. outstanding. thank you for sharing the fruits of your labours (yes, i see this is 11+ yrs old..just found it today). kind regards - j
WOW! amazing video! You're a genius! plain an simple! never had such a detailed yet clear explanation of how they work!
Awesome work, worthy of a standing ovation
This is absolutely amazing. I, for one, would love to see more videos explaining some of the challenges you faced, as well as some more info about the individual components and how they function. My hat is off to you, sir.
If anything, I have a much better understanding of how electron microscopes work, which in itself is priceless information. Awesome and inspiring! Keep up the good work!
i'm glad i live in the future, where someone can DIY a scanning electron microscope in his garage
Very nice work! I'll be following this as you continue to report on your progress!
Believe me, I'm impressed with what you have achieved so far. Having the PMT inside the vacuum is a neat solution and pretty unique as far as I'm aware. I wonder if you could dispense with the light pipe and just mount the scintillator directly to the PMT? Stigma lenses would be nice eventually, but they are difficult to engineer and the drive circuits would be complicated. At the current spot size I don't think it is much of an issue anyway.
Absolutely fantastic! Thanks for taking the time to explain in a pedagogical way. Very impressive!
A lot of lot of work! Now I understand basic principles of SEM. Thank you so much!
Excellent job getting that to work.
Good description too.
Amazing DIY! Perfect intro, kept me interested and wanting more. Nice voicework as well made it easy to listen to. You are the modern renaissance man.
"Next video we'll show how to build and install multiphasic torpedoes system onto your RV." We poke a little fun for those we respect. Love your channel. At least in the top 5 on my list. You'd be super handy on a mission to Mars.