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Electrostatic force-feedback force sensor incorporated in an ultrahigh vacuum force microscope
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
2000 (English)In: Review of Scientific Instruments, ISSN 0034-6748, Vol. 71, no 1, 133-136 p.Article in journal (Refereed) Published
Abstract [en]

A force sensor based on a fiber-optic interferometric displacement transducer incorporated in an ultrahigh vacuum atomic force microscope is described. The operation of the sensor is based on balancing the tip-sample interfacial force using an electrostatic actuator. The electrodes of the actuator are formed by the grounded W cantilever and the metallized end facet of the optical fiber used by the interferometer. Chemical reduction of Ag by a wet chemical method is used for metal coating of the fiber end. A special masking procedure is used to obtain a window hole in the metal coating at the position of the fiber core to allow for optical beam output. Using a window instead of a semitransparent metal film allows us to save the low-finesse characteristics of the interferometer which facilitates the calibration of cantilever displacement. The performance of the sensor is discussed and exemplified by experimental results from force-separation measurements on the W-Au system in ultrahigh vacuum. (C) 2000 American Institute of Physics. [S0034-6748(00)01401-5].

Place, publisher, year, edition, pages
2000. Vol. 71, no 1, 133-136 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-48376OAI: diva2:269272
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-14

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Erlandsson, Ragnar
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