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|a (TOE)ost1603485
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|a Current measurements in the intermittent-contact mode of atomic force microscopy using the Fourier method
|h [electronic resource] :
|b a feasibility analysis.
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|a Oak Ridge, Tenn. :
|b Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2020.
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|a Size: p. 453-465 :
|b digital, PDF file.
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|a text
|b txt
|2 rdacontent.
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|a computer
|b c
|2 rdamedia.
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|a online resource
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|a Published through Scitech Connect.
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|a 03/13/2020.
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|a "Journal ID: ISSN 2190-4286."
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|a "BJNEAH."
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|a Uluutku, Berkin ; Solares, Santiago D.
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|a George Washington Univ., Washington, DC (United States)
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|a USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
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|a Atomic force microscopy (AFM) is an important tool for measuring a variety of nanoscale surface properties, such as topography, viscoelasticity, electrical potential and conductivity. Some of these properties are measured using contact methods (static contact or intermittent contact), while others are measured using noncontact methods. Some properties can be measured using different approaches. Conductivity, in particular, is mapped using the contact-mode method. However, this modality can be destructive to delicate samples, since it involves continuously dragging the cantilever tip on the surface during the raster scan, while a constant tip?sample force is applied. In this paper we discuss a possible approach to develop an intermittent-contact conductive AFM mode based on Fourier analysis, whereby the measured current response consists of higher harmonics of the cantilever oscillation frequency. Such an approach may enable the characterization of soft samples with less damage than contact-mode imaging. To explore its feasibility, we derive the analytical form of the tip?sample current that would be obtained for attractive (noncontact) and repulsive (intermittent-contact) dynamic AFM characterization, and compare it with results obtained from numerical simulations. Although significant instrumentation challenges are anticipated, the modelling results are promising and suggest that Fourier-based higher-harmonics current measurement may enable the development of a reliable intermittent-contact conductive AFM method.
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|b SC0018041.
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|a 14 solar energy
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|a 30 direct energy conversion
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|a 36 materials science
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|a 47 other instrumentation
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|a 77 nanoscience and nanotechnology
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|a Tomic force microscopy (afm)
|2 local.
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|a Conductivity
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|a Current
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|a Intermittent contact
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|a Fourier analysis
|2 local.
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|a Tapping-mode afm
|2 local.
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information
|4 dst.
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|u http://www.osti.gov/servlets/purl/1603485
|z Full Text (via OSTI)
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|a .b113210942
|b 07-07-20
|c 07-07-20
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|a University of Colorado Boulder
|b Online
|c Online
|d Online
|i web
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