Beilstein J. Nanotechnol.2020,11, 703–716, doi:10.3762/bjnano.11.58
that gives a qualitative relationship between a set of contact resonance frequencies and the indentation modulus. It is based on white-noise excitation of the tip–sample interaction and uses systemtheory for the extraction of the resonance modes. During conventional scanning, for each pixel, the tip
compared to conventional techniques.
Keywords: atomic force microscopy; fast Fourier transform; mechanical properties; systemtheory; white noise; Introduction
There are several methods to measure mechanical properties at the nanoscale level, based on, e.g., nanoindentation or on other physical phenomena
instrumentation requirements and higher frequency resolution at different resonant modes. Also, more than one vibrational mode in each measurement step as well as indentation modulus mappings are obtained. This is possible when systemtheory [21] is taken into account, i.e., the system identification problem [22
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Figure 1:
Experimental setup for S-AFAM, using a NI PXIe-1073 device and a function waveform generator HP/Agi...
Beilstein J. Nanotechnol.2012,3, 722–730, doi:10.3762/bjnano.3.82
are involved, as already observed in other thin-oxide-based memristor systems [4].
The fundamental memristive systemtheory states that the observation of a pinched current-versus-voltage hysteresis loop measured from an experimental two-terminal device, when driven by a dc and/or sinusoidal signal of
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Figure 1:
Resistance-switching sequence: Writing and reading of local conductance modifications made on the L...