Morphological evaluation and film formation with iso-oriented calcite crystals using binary poly(acrylic acid)

Akiko Kotachi, Takashi Miura, Hiroaki Imai

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The influence of poly(acrylic acid) (PAA) on the morphological evolution of calcite crystals depended on the concentration and molecular weight of the polyelectrolyte in an aqueous solution. A low-molecular-weight PAA (Mw 2000) weakly suppressed the regular crystal growth and miniaturized calcite grains as a suppressant. High-molecular-weight PAA (Mw 90 000 or 250 000) drastically decreased the grain size as a strong suppressant and promoted the formation of thin films as a template on the surface of a glass substrate. The difference in the performance of the PAAs was ascribed to the mobility and conformation derived from the polymer chain length. In a binary polymer system (Mw 2000 and 250 000), lozenge-shaped films consisting of iso-oriented nanoscale crystal grains were produced through nucleation with the high-molecular-weight PAA anchored to a glass substrate and controlled growth with the mixture of low- and high-molecular-weight PAAs.

Original languageEnglish
Pages (from-to)3191-3196
Number of pages6
JournalChemistry of Materials
Issue number16
Publication statusPublished - 2004 Aug 10


ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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