Pyroelectricity in nonpolar directions in crystals: Enantiomeric disorder and surface wetting in racemic α-amino-acids

Eran Mishuk, Isabelle Weissbuch, Meir Lahav, Igor Lubomirsky

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Display of pyroelectricity along nonpolar directions of crystals or from surfaces implies structural disorder or presence of polar surface layers. Nonpolar {210} faces of polar dl-alanine crystals display far larger pyroelectric effect than that at the polar {001} faces. Similarly, pyroelectricity is reported from {110} faces of centrosymmetric crystals of dl-aspartic acid. The origin of the disorder is due to an interchange of enantiomers at specific chiral crystal sites as supported by atom-atom potential energy computations and by pyroelectric effect observed on the nonpolar crystals of l-alanine intentionally doped with opposite enantiomers. These results should explain the riddle of the needle-like morphology of dl-alanine. The {100} faces of dl-serine and the {021} faces of dl-glutamic acid monohydrate crystals exhibit pyroelectricity due to surface wetting, whereas pyroelectricity originating from the {210} faces of enantiomerically doped l-alanine crystals could be deciphered as arising both from surface wetting and enantiomeric bulk disorder.

Original languageEnglish
Pages (from-to)3839-3848
Number of pages10
JournalCrystal Growth and Design
Volume14
Issue number8
DOIs
Publication statusPublished - Aug 6 2014

Fingerprint

Pyroelectricity
pyroelectricity
wetting
amino acids
Wetting
Amino acids
disorders
Amino Acids
Crystals
alanine
Alanine
crystals
Enantiomers
enantiomers
aspartic acid
Atoms
glutamic acid
Acids
Interchanges
Potential energy

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Pyroelectricity in nonpolar directions in crystals : Enantiomeric disorder and surface wetting in racemic α-amino-acids. / Mishuk, Eran; Weissbuch, Isabelle; Lahav, Meir; Lubomirsky, Igor.

In: Crystal Growth and Design, Vol. 14, No. 8, 06.08.2014, p. 3839-3848.

Research output: Contribution to journalArticle

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