Noncontact Atomic Force Microscopy - Yale School of Engineering ...

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An Active Q Control System in Scanning Force Microscopy Jeehoon Kim 1 , Martin Zech 1 , and J. E. Hoffman 1 1 Department of Physics, Harvard University, Cambridge MA, USA P.I-19 We have developed a high vacuum, cryogenic scanning force microscope with a fiber optic interferometer detection system. The microscope has several features: (1) flexibility to employ either a horizontal cantilever or a vertical cantilever; (2) rigidity of design to allow DC cantilever deflection detection as small as 1 picometer; (3) an x-y walker to position the tip above interesting features within a 3 mm × 3 mm area. We have also developed an active quality factor (Q) control system by employing a phase shifter using capacitive coupling. The active Q control system allows Q reduction by a factor of 60 without sacrificing signal to noise ratio. This active Q control system is essential for non-contact force microscopy with a vertical cantilever in order to increase both a force resolution and spatial resolution. The Q control system could also be used in either vertical or horizontal cantilever mode to increase scanning speed, or to employ amplitude modulation mode scanning in a vacuum or low temperature environment. a) b) Figure 1: (a) The home-built high vacuum, cryogenic magnetic force microscope and (b) Schematic of the active Q system, showing phase shifter and capacitive coupling. 110
P.I-20 Besocke style quartz tuning fork FM-AFM/STM for use in UHV and low temperatures Shawn M. Huston 1 , Rachel T. Port 1 , Katie M. Andrews 1 , and Thomas P. Pearl 1 1 Department of Physics, North Carolina State University, Raleigh, USA The design and operation of a Besocke-style scanning probe microscope with both frequency modulated atomic force and scanning tunneling microscopy capabilities will be presented. This instrument has been optimized for use at low temperatures, either with helium or nitrogen cooling, in ultrahigh vacuum. FM-AFM is performed via a quartz crystal tuning fork in the qPlus sensor configuration. Cooling of the microscope is achieved through the use of a top-loaded bath cryostat that cools a pair of radiation shields which house the spring-suspended microscope assembly. This Besocke-style microscope is designed to record tunneling current and resonance frequency shift for a conductive tip mounted on the free prong of the tuning fork simultaneously Single molecule images of pentacene on Ag(111) at ~5 K recorded in both NC-AFM and STM modes will be proffered as a testament to the microscope’s effectiveness. 111
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12 th International Conference on N
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Welcome Dear conference participant
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Topics • Atomic resolution imagin
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Committees Program Committee Jaime
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General Information (cont.) Oral Pr
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Exhibitors 9
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Proceedings (cont.) 3. Length: Pape
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Conference Program 13
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Program Summary of the NC-AFM 2009
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Monday, August 10 Satellite Worksho
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Wednesday, August 12 Oxides Chair:
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Friday, August 14 Method Developmen
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Poster Session I cont. (Tuesday) In
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POSTER Session II (Wednesday) Molec
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Poster Session II cont. (Wednesday)
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Non-retarded and retarded interacti
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Mo-0955 Multiple Scattering Casimir
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Diego Dalvit 1 Dispersive Casimir i
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Using Casimir and capillary forces
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Near-field radiative heat transfer
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Mo-1615 Tricks and facts in a high
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Measuring the topological dependenc
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Mo-1755 Contact potential differenc
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3D Scanning Force Microscopy at Sol
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Tu-1000 Experimental and Theoretica
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Dynamic Force Spectroscopy of Singl
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Simultaneous measurement of force a
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Water, Ions, Membranes, Real Metals
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Tu-1530 The Effective Quality Facto
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We-0900 Imaging Single Atoms on Oxi
Page 61 and 62: We-0940 Character of the short-rang
Page 63 and 64: We-1020 Local surface photovoltage
Page 65 and 66: We-1140 Theoretical DFT simulations
Page 67 and 68: We-1220 Theoretical study of the fo
Page 69 and 70: Steering the formation of molecular
Page 71 and 72: Molecular scale dissipation in olig
Page 73 and 74: Dependence of the atomic scale imag
Page 75 and 76: Th-0940 Intramolecular features of
Page 77 and 78: Th-1020 Adhesion-induced energy dis
Page 79 and 80: Measuring Atomic Charge States by n
Page 81 and 82: Th-1220 Controlling electron transf
Page 83 and 84: Oral Presentations Friday, 14 Augus
Page 85 and 86: Small amplitude atomic resolution N
Page 87 and 88: Fr-1000 Visualization of Anisotropi
Page 89 and 90: Atomic resolution dynamic lateral f
Page 91 and 92: Bimodal AFM imaging of antibodies a
Page 93 and 94: Poster Session I Tuesday, 11 August
Page 95 and 96: P.I-02 Force Map of Atomic Force Mi
Page 97 and 98: P.I-04 Improved atomic-scale contra
Page 99 and 100: P.I-06 Resonance frequency shift du
Page 101 and 102: P.I-08 Atomic force microscope cant
Page 103 and 104: Self-assembled Boronitride Nanomesh
Page 105 and 106: P.I-12 Resolution enhanced multifre
Page 107 and 108: P.I-14 Kelvin Force Microscopy Dyna
Page 109 and 110: Open source scanning probe microsco
Page 111: P.I-18 Design of a Variable Tempera
Page 115 and 116: P.I-22 A homebuilt low-temperature
Page 117 and 118: P.I-24 High-Speed Frequency Modulat
Page 119 and 120: P.I-26 Deciphering Nanoscale Intera
Page 121 and 122: Dual-Frequency-Modulation AFM Spect
Page 123 and 124: P.I-30 Internal Resonances and Spat
Page 125 and 126: Relation between lateral forces and
Page 127 and 128: M. Teresa Cuberes Ultrasonic Nanoli
Page 129 and 130: Contacting self-ordered molecular w
Page 131 and 132: Molecular Structures of Organic Sin
Page 133 and 134: One and Two Dimensional Structure o
Page 135 and 136: Temperature-dependent growth of C60
Page 137 and 138: P.II-07 Atomic Force Microscopy Stu
Page 139 and 140: Imaging and Detection of Single Mol
Page 141 and 142: P.II-11 Imaging Schwann Cell NGF Re
Page 143 and 144: Molecular Resolution Investigation
Page 145 and 146: Development of Multifrequency High-
Page 147 and 148: Noncontact observation in liquid wi
Page 149 and 150: P.II-19 Cantilever Holder Design fo
Page 151 and 152: P.II-21 Manipulation Mechanism of S
Page 153 and 154: nc-AFM Investigations of Metal Nano
Page 155 and 156: P.II-25 Contrast formation on cross
Page 157 and 158: P.II-27 Non-contact scanning nonlin
Page 159 and 160: P.II-29 Local Dielectric Spectrosco
Page 161 and 162: P.II-31 Polarization-dependent elec
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Magnetic Resonance Force Microscopy
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P.II-35 Enhancement of the Exchange
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Abe M. 51,58,92,141 Clerk A. A. 78
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Martinez N. F. 69 Parashar P. 31 Ma
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List of Participants 169
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Ido Shinichiro Kyoto University ido
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Wright Alan University of Maryland
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Ultra-high precision spatial positi
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AD VT-QPlus_ONUS / 09-May Nanotechn
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Surface Analysis Technology Aarhus
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Notes
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NC-AFM 2009 Sessions Monday August
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