The optical spectra of confined polygermanes: From bulk film down to nanosize layers

Nina Ostapenko, Nata Kozlova, Masato Nanjo, Kunio Mochida, Shozo Suto

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The monitoring of poly(di-n-hexylgermane) (PDHG) optical spectra in a variety of structures ranging from a polymer film to nanosize polymer filled porous media was performed by optical spectroscopy in the temperature range from 5 to 250 K. The PDHG nanocomposites were fabricated by insertion of PDHG polymers into SBA-15 mesoporous silica and SiO2 porous films. Temperature dependence of the PDHG film fluorescence spectra shows that the polymer generally has disordered conformation while the random ordered segments behave as defects. The spectra of the composites correspond to the polymer chains with even less ordered segments and the aggregates of such chains. This is confirmed by the absence of the thermochromic transition in the composites contrary to the film. The difference between the optical spectra of the film and the composites is due to a decrease of both the intermolecular and exciton-phonon interactions in the composites. It was shown that the polymer chains in the SiO2 pores are more ordered.

Original languageEnglish
Pages (from-to)73-76
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume6
Issue number1
DOIs
Publication statusPublished - 2009 Apr 6
Event8th International Conference on Excitonic Processes in Condensed Matter, EXCON'08 - Kyoto, Japan
Duration: 2008 Jun 222008 Jun 27

ASJC Scopus subject areas

  • Condensed Matter Physics

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