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A Vertical Coarse Approach Scanning Tunneling MicroscopeDrevniok, BENEDICT 25 June 2009 (has links)
A Pan-style scanning tunneling microscope (STM), with a vertical coarse approach
mechanism, was designed, built and tested. The microscope will be operated in
ultra-high vacuum and also at cryogenic temperatures (8 K) inside a continuous
flow cryostat. Fundamental differences in operating principle exist between the new
microscope and the beetle-type inertial sliders [1] that have been the mainstay of
the group for the last eight years. While Pan-style microscopes do already exist [2],
they remain challenging to build, and an active area of research [3]. This system
represents a bold departure from well-trodden paths, and will greatly expand the range of experiments that our group can perform.
The operating principles of inertial piezoelectric motors are detailed. Design guidelines for a piezoelectric motor are given, and used in the design of the vertical coarse
approach motor. A simple, inexpensive implementation for creating waveforms with
an extremely fast fall time is discussed. Motor performance is tested, and a minimum
step size of 20nm is found for frequencies ranging from 0 Hz to 3 kHz. The motor
operates with high dynamic range: individual 20nm steps can be taken, as well as
being able to move at a velocity of 0.4mm s−1.
Little is known about the vibrational properties of Pan-style microscopes. Vibrational testing of the microscope revealed the expected scanner bending mode at 1.6 kHz (above the scanner bending mode of our beetles at 1.2 kHz), and a complicated
response signal above this frequency. Custom extension springs for an eddy-current
damping system are built and tested. A low resonant frequency of 1.8 Hz is found,
which is ideal for the application.
Initial testing of the STM in ambient conditions is performed on two different
surfaces. A moir´e supermesh [4] with periodicity 3nm is observed on a highly-oriented pyrolytic graphite (HOPG) surface, and agrees well with previously published results.
Using a flame-annealed Gold on mica surface, a low drift rate of 0.6nm s−1 is observed
over a period of 13 minutes. Single-height atomic steps are observed on both surfaces.
Additionally, the microscope is shown to be capable of zooming into different features
on a surface, and scanning at different length scales. / Thesis (Master, Physics, Engineering Physics and Astronomy) -- Queen's University, 2009-06-24 13:06:16.683
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Relaxation dynamics of labyrinthine submonolayer filmsKatsuno (Matsumoto), Kiiko, Uwaha, Makio, Irisawa, Toshiharu, Okano, Masakazu, Sudoh, Koichi 03 1900 (has links)
No description available.
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Scanning tunneling microscopy of complex electronic materialsTomic, Aleksandra T. January 2008 (has links)
Thesis (Ph.D.)--Michigan State University. Dept. of Physics and Astronomy, 2008. / Title from PDF t.p. (viewed on Mar. 27, 2009) Includes bibliographical references (p. 95-102). Also issued in print.
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Adaptation and application of morphological pseudoconvolutions to scanning tunneling and atomic force microscopy /Weisman, Andrew D. January 1991 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 1991. / Spine title: Application of morphological pseudoconvolutions to STM images. Includes bibliographical references.
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Laser scanning microscopy of broad freezing interfaces with applications to biological cells /Neils, Christopher Martin, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 203-215). Available also in a digital version from Dissertation Abstracts.
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Interactions between adsorbates and a stepped metallic surface studied with scanning tunneling microscopy and low energy electron diffraction /Pearl, Thomas Patrick. January 2000 (has links)
Thesis (Ph. D.)--University of Chicago, Department of Chmistry, August 2000. / Includes bibliographical references. Also available on the Internet.
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Electron transport in mesoscopic metallic structures /Purbach, Ulrich, January 1999 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 102-106). Available also in a digital version from Dissertation Abstracts.
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Low temperature scanning tunneling microscope study of metallic thin films and nanostructures on the semiconductor substratesQin, Shengyong, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.
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Ultra high vacuum low temperature scanning tunneling microscope for single atom manipulation on molecular beam epitaxy grown samples /Clark, Kendal. January 2005 (has links)
Thesis (M.S.)--Ohio University, June, 2005. / Includes bibliographical references (p. 46-50)
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Ultra high vacuum low temperature scanning tunneling microscope for single atom manipulation on molecular beam epitaxy grown samplesClark, Kendal. January 2005 (has links)
Thesis (M.S.)--Ohio University, June, 2005. / Title from PDF t.p. Includes bibliographical references (p. 46-50)
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