Local Dielectric Spectroscopy of Nanocomposite Materials Interfaces

Details Local Dielectric Spectroscopy of Nanocomposite Materials Interfaces Local Dielectric Spectroscopy of Nanocomposite Materials Interfaces

2009-11-09

arxiv.org/abs/0911.1655v1

Physics

Condensed Matter

Soft Condensed Matter

21 pages, 4 figures, 1 table

Scientific paper

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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