Direct measurement of surface forces between monolayers of anchored poly(L-glutamic acid)

Takashi Abe, Kazue Kurihara, Nobuyuki Higashi, Masazo Niwa

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Interactions between apposed poly(L-glutamic acid) monolayers in water were investigated by direct surface force measurements. The average degree of polymerization was 21. Surface force profiles consisted of a long-range electrostatic repulsion and a short-range steric repulsion. Secondary structures of the polypeptide were found to determine the short-range steric repulsion. The elastic compressibility moduli of the polypeptide monolayers were obtained to be 5.6 ± 2.2 MPa for the β2-structure-rich layer and 0.2 ± 0.1 MPa for the layer of ionized extended chains.

Original languageEnglish
Pages (from-to)1820-1823
Number of pages4
JournalJournal of physical chemistry
Volume99
Issue number7
DOIs
Publication statusPublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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