Interrogation of nanoscale silicon dioxide/water interfaces via Hyper-Rayleigh scattering

Fredrick W. Vance, Buford I. Lemon, Jessica A. Ekhoff, Joseph T. Hupp

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Hyper-Rayleigh scattering (HRS) experiments performed on nanometer-scale SiO2/water interfaces (aqueous colloidal suspensions) display finite, measurable signals. HRS is not constrained by the orientational, size, and/or charge restrictions inherent to conventional interfacial second harmonic generation (SHG) or electric-field-induced SHG measurements. Thus, apparently for the first time, the second-order nonlinear optical (NLO) response of ultrasmall interfaces has been measured. pH- and electrolyte-dependent experiments show the response to be sensitive to changes in chemical composition at the silicon dioxide/solution interface. HRS provides detailed information about the surface of these technologically interesting and important particles in their native solution-phase environment.

Original languageEnglish
Pages (from-to)X-1848
JournalJournal of Physical Chemistry B
Volume102
Issue number11
DOIs
Publication statusPublished - Mar 12 1998

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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