Polar growth and directional adsorption of large AlPO4-5 crystals determined by scanning pyroelectric microscopy

Citation
Gj. Klap et al., Polar growth and directional adsorption of large AlPO4-5 crystals determined by scanning pyroelectric microscopy, CHEM MATER, 11(12), 1999, pp. 3497-3503
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
CHEMISTRY OF MATERIALS
ISSN journal
08974756 → ACNP
Volume
11
Issue
12
Year of publication
1999
Pages
3497 - 3503
Database
ISI
SICI code
0897-4756(199912)11:12<3497:PGADAO>2.0.ZU;2-6
Abstract
Scanning pyroelectric microscopy on large crystals reveals the three-dimens ional polarization distribution in AlPO4-5 crystals. AlPO4-5 probably grows in such a way that one particular absolute configuration is formed. In gen eral twinned crystals are formed. The twin domains exhibit an opposite pola rization. A single domain is found when crystals are grown from a substrate . In some cases the crystals show a more complex domain structure, which ca n be attributed to specific growth conditions. From the polarization distri bution the history of the crystal growth can be retrieved. A mechanism for the adsorption of p-nitroaniline molecules is proposed on the basis of the polarization distribution in AlPO4-5 crystals and earlier observed preferen tial orientation of this guest molecule in the host structure.