Low Temperature Physics: 32, 1035 (2006); https://doi.org/10.1063/1.2389010 (7 pages)
Fizika Nizkikh Temperatur: Volume 32, Number 11 (November 2006), p. 1363-1371    ( to contents , go back )

Spectroscopy of nanosized composites silicon-organic polymer/nanoporous silicas

N. Ostapenko1, N. Kozlova1, S. Suto2, and A. Watanabe3

1Institute of Physics, National Academy of Science of Ukraine, 46 Nauka Ave., Kiev 03028, Ukraine
E-mail: ostap@iop.kiev.ua

2Department of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan

3Institute of Multidisciplinary Resource for Advanced Materials, Tohoku University Sendai 980-8577, Japan
pos Анотація:

Received May 15, 2006

Abstract

Fluorescence and excitation spectra (T = 5–290 K) of nanosized silicon–organic polymers poly(di-n-hexylsilane) and poly(methyl(phenyl)silane) incorporated into porous silica materials MCM-41 and SBA-15 have been studied with varying pore diameter from 2.8 to 10 nm. The controlled variation of the pore diameter in the wide range (2.8–10 nm) permitted us, for the first time, to investigate the optical properties of the polymers on their transition from isolated macromolecules to a film. It is found that this transition depends on polymer type and occurs via the formation of new spatially independent structures of the polymers not observed in the spectra of the film, namely, via the formation of disordered and (or) ordered conformations of polymer chains and clusters.

PACS:
78.55.Qr - Amorphous materials; glasses and other disordered solids
79.60.Jv - Interfaces; heterostructures; nanostructures

Key words: nanosized composites, silicon–organic polymers, nanoporous silicas, optical spectra.

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