Accession Number:

ADA285518

Title:

Reaction of Methanol with Porous Silicon

Descriptive Note:

Technical rept.

Corporate Author:

PITTSBURGH UNIV PA DEPT OF CHEMISTRY

Report Date:

1994-10-06

Pagination or Media Count:

36.0

Abstract:

The reaction of both porous silicon and hydrogen covered passivated porous silicon with methanol was investigated. Adsorption of methanol onto porous silicon at 300 K resulted in cleavage of the 0-H bond and formation of Si-OCH3 and Si-H surface species. Heating of these surface species to approx. 500 K caused breakage of both the C-0 and C-H bonds. This resulted in the formation of Si-H surface species and the incorporation of oxygen and carbon into the porous silicon layer. Attempts to adsorb methanol onto passivated porous silicon proved unsuccessful until removal of the Si-H surface species commenced at 600 K. In addition to oxygen and carbon incorporation, Si-OCH3, Si- CH3, and Si-H surface species were observed when excess CH30H g was used to drive the decomposition reaction. The stability of the Si-CH3 species when excess CH30H g was present is likely due to oxygen andor carbon passivation of the silicon surface. Silicon, Methanol, Porous silicon, Methoxy, Infrared spectroscopy, Surface chemistry

Subject Categories:

  • Inorganic Chemistry
  • Organic Chemistry
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE