Comments on: Building a Scanning Tunneling Microscope for less than $100 http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/ A community of Physics Phans! Sun, 20 Jul 2008 13:44:24 +0000 http://wordpress.org/?v=1.5.1.3 by: Christopher Moore http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-68673 Wed, 27 Feb 2008 16:46:10 +0000 http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-68673 The distance is controlled via a low-voltage unimorph piezo disk and an analog feedback circuit. We can control the distance via an analog set-point voltage on the difference amplifier. There is no vacuum. This is an air device and is therefore only able to resolve a few systems on the atomic scale (like graphite). Our STM does not work (yet!). However, we are not the first to construct this design. It has been built and it works elsewhere. The distance is controlled via a low-voltage unimorph piezo disk and an analog feedback circuit. We can control the distance via an analog set-point voltage on the difference amplifier.

There is no vacuum. This is an air device and is therefore only able to resolve a few systems on the atomic scale (like graphite).

Our STM does not work (yet!). However, we are not the first to construct this design. It has been built and it works elsewhere.

]]> by: Saranyan http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-68458 Sat, 23 Feb 2008 11:11:58 +0000 http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-68458 man..thats wonderful if u can build an STM for so cheap a price. Are you able to control the distance at the tunnelling regime. how do u manage with the temperature and vacuum? May I will send my first sample to you. all the best with ur work. If this works, developing countries will have access to STMs too. Good luck! man..thats wonderful if u can build an STM for so cheap a price. Are you able to control the distance at the tunnelling regime. how do u manage with the temperature and vacuum?
May I will send my first sample to you. all the best with ur work. If this works, developing countries will have access to STMs too. Good luck!

]]> by: Chris Moore http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-65538 Thu, 17 Jan 2008 21:41:02 +0000 http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-65538 We are still working hard! We ran into a few problems with the electronics and the piezo disk that we are trouble shooting. My student is getting a grade for this project this semester, so he will be required to keep this blog up-to-date on our progress. You should start seeing more updates in the next week or two. Also, I have another student building a sputtering system for thin-film deposition. He will be writing about that project here, as well. We are still working hard! We ran into a few problems with the electronics and the piezo disk that we are trouble shooting.

My student is getting a grade for this project this semester, so he will be required to keep this blog up-to-date on our progress. You should start seeing more updates in the next week or two.

Also, I have another student building a sputtering system for thin-film deposition. He will be writing about that project here, as well.

]]> by: Scott http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-65208 Sat, 12 Jan 2008 03:04:27 +0000 http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-65208 Any updates to the STM project? It looks like a really cool project and was wondering if you got it up and running yet? Any updates to the STM project? It looks like a really cool project and was wondering if you got it up and running yet?

]]> by: TuLyn http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-61200 Wed, 17 Oct 2007 04:43:47 +0000 http://www.ilovephysics.com/archives/2007/10/15/building-a-scanning-tunneling-microscope-for-less-than-100/#comment-61200 I am developing a site. There are hundreds of free math video tutorials already. I am aiming to submit over 1000 video tutorias by the end of 2007. Do you need <a href="http://tulyn.com" rel="nofollow">help with algebra</a>. Take a look at my site. If you have any suggestions, please let me know. I am developing a site. There are hundreds of free math video tutorials already. I am aiming to submit over 1000 video tutorias by the end of 2007. Do you need help with algebra. Take a look at my site. If you have any suggestions, please let me know.

]]>