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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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The fabrication of specialized probes for surface metrologyWilliams, Ryan Donald, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
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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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Near Field Scanning Optical Microscopy(NSOM) of nano devicesLow, Chun Hong. January 2008 (has links) (PDF)
Thesis (M.S. in Combat Systems Science and Technology)--Naval Postgraduate School, December 2008. / Thesis Advisor(s): Haegel, Nancy M. ; Luscombe, James. "December 2008." Description based on title screen as viewed on January 29, 2009. Sponsoring/Monitoring Agency Report Number: "DMR-0526330." Includes bibliographical references (p. 59-61). Also available in print.
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Nucleation and growth of inorganic crystals at the organic-inorganic interface /Dennis, Shelli R. January 1998 (has links)
Thesis (Ph. D.)--University of Washington, 1998. / Vita. Includes bibliographical references (leaves [140]-152).
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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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Photophysical characterization and near-field scanning optical microscopy of dilute solutions and ordered films of alkyl-substituted polyfluorenes /Teetsov, Julie Ann, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 177-184). Available also in a digital version from Dissertation Abstracts.
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Development of chemomechanical functionalization and nanografting on silicon surfaces /Lee, Michael V. January 2007 (has links) (PDF)
Thesis (Ph. D.)--Brigham Young University. Dept. of Chemistry and Biochemistry, 2007. / Includes bibliographical references.
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Multiphoton microscopy, fluorescence lifetime imaging and optical spectroscopy for the diagnosis of neoplasiaSkala, Melissa Caroline, January 2007 (has links) (PDF)
Thesis (Ph. D.)--Duke University, 2007. / Includes bibliographical references.
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Fabrication of atomic force microscope probes integrated with microelectrodes for micro four-point probe and SECM-AFMShin, Heungjoo. January 2006 (has links)
Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2006. / Levent Degertekin, Committee Member ; William P. King, Committee Member ; Boris Mizaikoff, Committee Member ; Mark G. Allen, Committee Member ; Peter J. Hesketh, Committee Chair.
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