Effect of water on silanization of silica by trimethoxysilanes

Alexey V. Krasnoslobodtsev, Sergei N. Smirnov

Research output: Contribution to journalArticle

132 Scopus citations

Abstract

Water has a big influence on the mechanism of monolayer formation and therefore on the structure of monolayer that can be obtained on a silica surface. Trimethoxysilane in the absence of water can form submonolayers with only one siloxane bond binding functional tails with the surface. We show here that hydrolysis of the remaining methoxy groups on the initial immobilized silane layer by water and followed by another silanization yields enhanced surface density of silanes with improved lateral polymerization and without complications of vertical polymerization. The improved technique allows surface concentration of coumarin dye molecules of 2.7 × 1014 cm-2, almost 1.3 times higher than what is possible without water treatment.

Original languageEnglish (US)
Pages (from-to)3181-3184
Number of pages4
JournalLangmuir
Volume18
Issue number8
DOIs
StatePublished - Apr 16 2002

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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