pH-dependent water structure at a quartz surface modified with an amino-terminated monolayer studied by sum frequency generation (SFG)

Shen Ye, Satoshi Nihonyanagi, Kohei Uosaki

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The structures of water at the interfaces between a fused quartz surface modified by a self-assembled monolayer (SAM) of an amino-terminated silane molecule and electrolyte solutions of various pHs were investigated using sum frequency generation (SFG) vibrational spectroscopy. The structure of the interfacial water significantly depended on the solution pH. The effect of the electric double layer generated by the protonation of the amino groups in the SAM and unreacted silanol groups on the quartz substrate is considered to be responsible for the pH-dependence.

Original languageEnglish
Pages (from-to)734-735
Number of pages2
JournalChemistry Letters
Issue number7
DOIs
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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