Oriented nucleation of inorganic salts on polymeric long chain acid monolayers

Amir Berman, Deborah Charych

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Directed crystallization of calcite and CdS was studied on polymerized 10,12 pentacosadiynoic acid (p-PDA) template. Precise lattice match between calcite a axis and the carboxylates periodicity along the linear polymer backbone, and stereochemical fit between the titled monolayer and inclined carbonate at the (0 1 2) of calcite, induce total control of calcite nucleation. Polymer crystalline domains can be several hundreds of micrometers in dimension. Consequently, the templated calcite crystals are all coaligned within this range. p-PDA film with CdS nucleated on it, produces a selected area electron diffraction pattern which is a superimposition of 4 different projection of CdS FCC structure. All the projections have a common (2 2 0) diffraction spot, suggesting alignment along this direction. This suggests that crystallites can in fact be in any orientation with only one crystal axis aligned with the substrate. This represents a unique example of template crystallization where limited control is manifested. The p-PDA film is particularly suitable for template nucleation studies due to its rigidity and large domains. This results in well-defined crystal orientation over the extent of the substrate domains.

Original languageEnglish
Pages (from-to)796-801
Number of pages6
JournalJournal of Crystal Growth
Volume198-199
Issue numberPART I
DOIs
StatePublished - 1 Jan 1999

Keywords

  • Calcite
  • CdS
  • Epitaxy
  • Organic-inorganic interface
  • Oriented nucleation

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