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- Path: sparky!uunet!ogicse!flop.ENGR.ORST.EDU!rutgers!igor.rutgers.edu!planchet.rutgers.edu!nanotech
- From: alfa@werple.apana.org.au (Glenn Durden)
- Newsgroups: sci.nanotech
- Subject: Re: Homebrewed STM
- Message-ID: <Jan.25.16.19.14.1993.9868@planchet.rutgers.edu>
- Date: 25 Jan 93 21:19:14 GMT
- Article-I.D.: planchet.Jan.25.16.19.14.1993.9868
- Sender: nanotech@planchet.rutgers.edu
- Organization: werple public-access unix, Melbourne
- Lines: 28
- Approved: nanotech@aramis.rutgers.edu
-
- ajackson@phoenix.princeton.edu (Andrew William Jackson) writes:
-
- >In article <Jan.19.22.33.54.1993.23032@planchet.rutgers.edu> ewstroup@cc.utah.edu (ERIC W. STROUP) writes:
- >> I agree with you completely. Building a STM/AFM from scratch would
- >>give valuable insight into its workings.
-
- >Reading a few scientific papers would give you valuable insight into its
- >workings.
-
- >ajackson@ernie.princeton.edu
-
- About 2 or 3 years ago I investigated the possibility of making my own STM
- (and I presume you meamn Scanning Tunnelling Microscope, since I came in
- late on this), and although the electronincs for scanning seemed relatively
- easy for anyone with a few years experience, the biggest (unresolved) problem
- I found was the actual movement mechanism.
- From reading up on the topic, it seemed peizo electric devices were easy to
- manipulate - ie: you gave the things a voltage, and would deform a particular
- abount... however I couldnt find any piezo-electric devices that behaved thi
- (excuse the formatting of this pls) err.. that behaved this way with DC
- voltages. Given a AC volatge, they would deform as expected (and beep if the
- frequency was above a few hundred Hz... but given a DC voltage, they would
- behave like a capacitor, in that they wouldnt deform to any measurable
- amount, and like a capacitor, would absorb a charge.
- Since scanning rates in STM's arent quick, this effectively killed my
- 'project', since I couldnt find a peizo electric device that would do what
- I needed (ie: deform to a given voltage).
- So... to any people who HAVE built one, what did you use?
-