Evaluation of pH of water between solid surfaces using surface forces apparatus fluorescence spectroscopy

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3 Citations (Scopus)

Abstract

Fluorescence spectrum measurement of fluorescein was performed for monitoring the pH of water between mica and silica surfaces by varying the surface separation (D) using a surface forces apparatus (SFA) fluorescence spectroscopy. The pH value of water between silica surfaces decreased drastically with a decrease in D to values below 1200 nm, which was longer than that in the case of mica (600 nm). This pH decrease was attributed to concentrated proton in electric double layer of negatively charged surfaces.

Original languageEnglish
Pages (from-to)1282-1284
Number of pages3
JournalChemistry Letters
Volume41
Issue number10
DOIs
Publication statusPublished - 2012 Nov 7

ASJC Scopus subject areas

  • Chemistry(all)

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