AFM


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AFM

(Atomic Force Microscope) A device used to image materials at the atomic level. AFMs are used to solve processing and materials problems in electronics, telecom, biology and other high-tech industries. Invented by IBM in 1986, it uses a ceramic or semiconductor tip one atom wide positioned at the end of a cantilevered bar. As the tip is moved over the material, it either continously touches or periodically taps the surface and bends as it is repelled or attracted to the structure. A laser picks up the deflections.

In contrast to a scanning tunneling microscope (STM), which sends current to the surface being measured, AFMs can be used to image non-conductive materials. See probe storage, STM, microscopy and nanotechnology.
References in periodicals archive ?
By 2008, AFM became "primarily a DVD market" (VideoAge, Nov.
Two AFM techniques, AM-FM and Contact Resonance Viscoelastic Mapping Modes, enable high resolution, quantitative mapping of both the elastic modulus and the viscous response (i.
SND, Films Distribution and a few more--will pay big bucks to be part of the show and work from their suites inside the Loews Hotel in Santa Monica, at least 10 smaller shingles--including MK2, Rezo, Le Pacte, Wide Management and Urban Distribution--repped by Unifrance have opted out of AFM for a second year and will set up shop in an art gallery a few blocks from the Loews.
That it comes just three months after the release of our revolutionary Dimension FastScan AFM is evidence of our continuing technical leadership,” added David V.
The entire Cypher AFM system was designed from the ground up to provide superior capabilities and to generate the most accurate images and measurements possible, according to the firm.
Without the initial support of AFM and ongoing support from Liverpool Ventures we would not be in this position.
For example, a 15-base DNA segment that travels through a microchannel in 170 seconds could traverse an AFM tip in just 5 milliseconds.
The heart of the AFM is a probe comprising a microfabricated cantilever with an extraordinarily sharp tip.
The AFM consists of an insulated box, about the size of a microwave oven on its side, a suspended platform to limit vibration, and a removable cylindrical apparatus that holds the "turntable"--a metal disk.
AFM strikes brought the recording of new music to a halt in 1943 and 1948, but when the union tried again in 1958 it just didn't work.
Matt Daniels, director of the AFM, declined to comment on the controversy directly but did release a letter from an attorney, Chuck Allen, citing sources that defended the ISNA.
This is because the concept of AFM, its principles of operation and the information obtainable are almost certainly better understood than those of STM In many ways, AFM has largely superceded STM and although most SPM instrument manufactures provide modular systems with the ability to use both techniques, many users rarely use their STM scanners if indeed they are bought at all.