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Titolo:
INFRARED SPECTROSCOPIC STUDIES ON THE MOLECULAR-ORIENTATION OF VACUUM-DEPOSITED THIN-FILMS OF POLY(DIMETHYLSILANE) AND A LINEAR OLIGOSILANE
Autore:
SHIMOMURA M; OKUMOTO H; KAITO A; UENO K; SHEN JS; ITO K;
Indirizzi:
NATL INST MAT & CHEM RES,1-1 HIGASHI IBARAKI OSAKA 3058565 JAPAN ACAD SINICA,INST CHEM BEIJING 100080 PEOPLES R CHINA UNIV TOKYO,GRAD SCH ENGN,BUNKYO KU TOKYO 1138656 JAPAN
Titolo Testata:
Macromolecules
fascicolo: 21, volume: 31, anno: 1998,
pagine: 7483 - 7487
SICI:
0024-9297(1998)31:21<7483:ISSOTM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYSILANE HIGH POLYMERS; ELECTRONIC-SPECTRA; EVAPORATION; PIEZOCHROMISM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
M. Shimomura et al., "INFRARED SPECTROSCOPIC STUDIES ON THE MOLECULAR-ORIENTATION OF VACUUM-DEPOSITED THIN-FILMS OF POLY(DIMETHYLSILANE) AND A LINEAR OLIGOSILANE", Macromolecules, 31(21), 1998, pp. 7483-7487

Abstract

Thin films of poly(dimethylsilane) (PDMS) and permethyldodecasilane (DM12) were prepared by the vacuum-deposition method, and the molecularorientation in the films was investigated. Well-oriented films of DM12 were prepared without detectable degradation; however, degradation occurred in the films of PDMS, though well-oriented films were also obtained. Infrared and UV spectra of the vacuum-deposited films were measured with inclined sample alignment. In the spectra of films depositedto substrates at room temperature, a methyl rocking (parallel) band and a sharp UV absorption, which have the same polarity parallel to thechain axis, became stronger when the samples were inclined. Both of the absorptions also showed large dichroism when the samples were inclined. These results suggest that the PDMS and DM12 molecules in the films were oriented perpendicular to the substrate. The infrared spectra of vacuum-deposited PDMS films show Si-H and Si-O bonds formation; i.e., PDMS molecules were degraded during the deposition process. In clear contrast, the infrared spectra of the vacuum-deposited films of DM12showed no molecular degradation.

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Documento generato il 23/09/20 alle ore 09:31:06