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11.12.2001
16:06 |
Ultrahigh Vacuum SPM - Made in Russia GPI SPM belongs to ultrahigh scanning probe microscopes aimed at imaging
surfaces with a resolution up to the atomic one. The device construction
is based on the following principles:
- The device can work in combination with standard analyzing techniques
provided that surfaces are prepared properly to be treated in ultrahigh
vacuum;
- while scanning the sample
surface is easily accessed by electrons, photons, atoms, and molecules;
- control electronics scheme, a vacuum module, a needle-and-sample gearing
system, a locking device, as well as other components are kept unchanged
while using heads of all kinds: from atomic power-producing heads to
spin-polarized ones that work under stable or varying temperature.
GPI SPM-300 is a high vacuum scanning tunnel microscope which allows
imaging sample surfaces at atomic resolution under room temperatures.
The device can be used to study any surface processes in vivo. The
application areas may be as follows:
-chemical and photochemical reactions;
-catalysis;
-spraying;
-semiconductor technologies;
-adsorption;
-modification of surfaces by ions, electrons, and other particles;
-nanotechnology, atomic manipulations.
Software available provides various SPM scanning regimes: those of
tunnel direct current, fixed height, recording of work function chart,
as well as a special regime of measuring and compensating for drift and
sample inclination. Moreover, there is a regime of recording of
current-voltage characteristics and supply curves at any point of an
image, as well as one of SPM-lithography.
The device was worked out in the General Physics Institute,
Russian Academy of Sciences (GPI RAS) in 1994 and has been approved within
6 years
in the laboratory of surface phenomena. Cardinal items to be studied were
chlorination reactions on metals and semiconductors, carbon nanotubes and
radiation defects on graphite surfaces.
The most significant scientific results obtained with GPI SPM-300 in GPI
RAS are shown in Figures and published in [1-6].
1. B.V.Andryushechkin, K.N.Eltsov, V.M.Shevlyuga. "Scanning tunnel
microscopy of "commensurate - incommensurate structure" phase transitions
in chemisorbed halogen layers"(in Russian), Uspekhi Phizicheskih Nauk,
v.170 (2000), 571.
2. B.V.Andryushechkin, K.N.Eltsov, V.M.Shevlyuga, V.Yu.Yurov. "Direct STM
observation of surface modification and growth of AgCl islands on Ag(111)
upon chlorination at room temperatures", Surface Science, v.431 (1999),
96.
3. B.V.Andryushechkin, K.N.Eltsov, V.M.Shevlyuga. "Atomic structure of
silver chloride formed on Ag(111) surface upon low temperature
chlorination", Surface Science, v.433-435 (1999), 109.
4. B.V.Andryushechkin, K.N.Eltsov, V.M.Shevlyuga, V.Yu.Yurov. "Atomic
structure of saturated monolayer on Ag(111) surface", Surface Science,
v.407 (1998), L633.
5. K.N.Eltsov. "Surface chemical reactions and their applications in
nanotechnology", Vestnik RAS, v.67 (1997), 985.
6. K.N.Eltsov, A.N.Klimov, V.Yu.Yurov, U.Bardi, M.Galeotti, V.M.Shevlyuga,
and A.M.Prokhorov. "Surface atomic structure at Cu(100) chlorination
observed with scanning tunneling microscopy", Pis'ma ZhETPh, v.62 (1995),
444.
GPI RAS produces and delivers any devices of the series GPI SPM. So far
high vacuum scanning tunneling GPI SPM microscopes have been supplied for:
-University of Florence, Italy;
-Institute of catalysis of the RAS Siberian division;
-Institute of Automatic Machinery and Running Problems of the RAS
Far-East division, Vladivostok;
-Ioffe Physical Technical Institute of RAS, St.Petersburg;
-Bashkiria State University, Ufa;
-Institute of Physics and Technology of RAS Ural division,
Izhevsk.
Contact: Konstantin Nikolaevich Eltsov
Tel. (095) 132 8190
E-mail: eltsov@kapella.gpi.ru
Web-site: http://surface.gpi.ru/
Translated by Nataliya Lipunova
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