Asymmetric growth of alpha-resorcinol crystals: in situ studies of crystal growth from the vapor phase

K. Srinivasan, J. N. Sherwood

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In situ studies of the growth of the acentric crystal alpha-resorcinol from the vapor phase confirm that the mechanism of growth differs on the faces presented at the opposite ends of the polar axis of this material. At medium supersaturations (sigma = 0.76), the growth of the (0 (11) over bar) and (01 (1) over bar) faces proceeds by the cooperative development of strongly propagating growth sources. Under similar conditions, the (011) and (0 (1) over bar1) faces develop a mosaic of flat-topped growth centers. These develop individually and merge to form a continuous, curved, facet bearing a few residual, weakly propagating birth and spread growth sources. The degree to which this mosaic growth occurs depends on the damage done to the face of the seed crystal during preparation. This behavior accounts for the previously observed wide variation in the estimates of growth rate of the positive faces and the differential in growth rates compared with that of the negative faces. On more perfect (011) surfaces, growth is restricted to a small degree of nucleation at isolated random centers. These nuclei undergo a more limited localized growth to yield a nonpropagating macroscopic surface roughness. These observations provide further evidence for our previously expressed contention that the anisotropic growth of this and related highly polar acentric materials arises from intrinsic mechanistic causes.
LanguageEnglish
Pages5010-5018
Number of pages9
JournalCrystal Growth and Design
Volume11
Issue number11
DOIs
Publication statusPublished - Nov 2011

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Crystallization
Crystal growth
crystal growth
Vapors
vapor phases
Crystals
crystals
Bearings (structural)
resorcinol
Supersaturation
Nucleation
supersaturation
Surface roughness
seeds
flat surfaces
surface roughness
nucleation
damage
preparation

Keywords

  • solvent
  • aqueous-solution
  • riddle
  • transitions
  • perfection
  • asymmetric growth
  • alpha-resorcinol crystals
  • in situ studies
  • crystal growth
  • vapor phase

Cite this

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abstract = "In situ studies of the growth of the acentric crystal alpha-resorcinol from the vapor phase confirm that the mechanism of growth differs on the faces presented at the opposite ends of the polar axis of this material. At medium supersaturations (sigma = 0.76), the growth of the (0 (11) over bar) and (01 (1) over bar) faces proceeds by the cooperative development of strongly propagating growth sources. Under similar conditions, the (011) and (0 (1) over bar1) faces develop a mosaic of flat-topped growth centers. These develop individually and merge to form a continuous, curved, facet bearing a few residual, weakly propagating birth and spread growth sources. The degree to which this mosaic growth occurs depends on the damage done to the face of the seed crystal during preparation. This behavior accounts for the previously observed wide variation in the estimates of growth rate of the positive faces and the differential in growth rates compared with that of the negative faces. On more perfect (011) surfaces, growth is restricted to a small degree of nucleation at isolated random centers. These nuclei undergo a more limited localized growth to yield a nonpropagating macroscopic surface roughness. These observations provide further evidence for our previously expressed contention that the anisotropic growth of this and related highly polar acentric materials arises from intrinsic mechanistic causes.",
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Asymmetric growth of alpha-resorcinol crystals : in situ studies of crystal growth from the vapor phase. / Srinivasan, K.; Sherwood, J. N.

In: Crystal Growth and Design, Vol. 11, No. 11, 11.2011, p. 5010-5018.

Research output: Contribution to journalArticle

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