Local Dielectric Spectroscopy of Nanocomposite Materials Interfaces
Massimiliano Labardi,Daniele Prevosto,Kim Hung Nguyen,Simone Capaccioli,Mauro Lucchesi,Pierangelo Rolla +5 more
TL;DR: In this article, local dielectric spectroscopy is performed to study how relaxation dynamics of a polyvinyl-acetate ultra-thin film is influenced by inorganic nano-inclusions of a layered silicate (montmorillonite).
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Abstract: Local dielectric spectroscopy is performed to study how relaxation dynamics of a poly-vinyl-acetate ultra-thin film is influenced by inorganic nano-inclusions of a layered silicate (montmorillonite). Dielectric loss spectra are measured by electrostatic force microscopy in the frequency-modulation mode in ambient air. Spectral changes in both shape and relaxation time are evidenced across the boundary between pure polymer and montmorillonite sheets. Dielectric loss imaging is also performed, evidencing spatial variations of dielectric properties near to nanostructures with nanometer scale resolution.
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T. R. Albrecht,D. Horne,D. Rugar +2 more
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TL;DR: In this paper, a frequency modulation (FM) technique has been demonstrated which ennances the sensitivity of attractive mode force microscopy by an order of magnitude or more, which is made possible by operating in a moderate vacuum ( < 10 ’ Torr).
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