Phase imaging with intermodulation atomic force microscopy

Details Phase imaging with intermodulation atomic force microscopy Phase imaging with intermodulation atomic force microscopy

2009-11-14

arxiv.org/abs/0911.2734v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 6 pages

Scientific paper

Intermodulation atomic force microscopy (IMAFM) is a dynamic mode of atomic force microscopy (AFM) with two-tone excitation. The oscillating AFM cantilever in close proximity to a surface experiences the nonlinear tip-sample force which mixes the drive tones and generates new frequency components in the cantilever response known as intermodulation products (IMPs). We present a procedure for extracting the phase at each IMP and demonstrate phase images made by recording this phase while scanning. Amplitude and phase images at intermodulation frequencies exhibit enhanced topographic and material contrast.

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