Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent 5991-3184EN Current Sensing AFM Measurements Using 7500 AFM - Application Note c20141020 [2]

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>> Download 5991-3184EN Current Sensing AFM Measurements Using 7500 AFM - Application Note c20141020 [2] documenatation <<

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  Keysight Technologies
  Current Sensing AFM Measurements
  Using 7500 AFM
  Application Brief


                                                Introduction                                 universal scanner operating in both
                                                                                             Open-loop and Closed-loop mode.
                                                Current Sensing Atomic Force Microscopy      Switching imaging modes with the
                                                (CSAFM) is an extended SPM mode for          Keysight 7500 AFM/SPM microscope
                                                simultaneously probing the conductivity      is quick and convenient, a result from
                                                and topography of a sample. It takes         the scanner's interchangeable, easy-
                                                the combined advantage of scanning           to-load nose cones. All 7500 AFM's
                                                tunneling microscopy and force micros-       come with the lowest noise closed
                                                copy, making it capable of studying          loop position detectors to provide the
                                                localized electric properties of resistive   ultimate convenience and performance
                                                samples. CSAFM utilizes electrically         in imaging, without sacriicing resolution
                                                conductive AFM cantilevers and               and image quality.
                                                operates in standard contact mode. By
                                                applying a voltage bias between the          The Keysight 7500 microscope with the
                                                substrate and the conducting cantilever,     addition of a preamp, and the standard
                                                a current is generated. This current can     nosecone enables CSAFM mode.
                                                be used to construct a spatially resolved    Preamps are available in three different
                                                conductivity image. It also allows for       sensitivity settings of 0.1nA/V, 1nA/V,
Metroscanner (top) and preamp board (bottom).
                                                local current vs. voltage measurements       and 10nA/V, yielding current ranges of
                                                (I/V) with purely topographic feedback.      

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