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Proceedings Paper

Toward efficient crystal growth of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) in space: vapor pressure measurements and growth morphology studies
Author(s): Maria Ittu Zugrav; Franz Rosenberger
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Paper Abstract

DAN, 4-(N,N-dimethylamino)-3-acetamidonitrobenzene is an organic nonlinear optical material with particularly high polarizability of the molecule. In order to provide a sound base for the optimization of (flight) crystal growth experiments, we have performed vapor pressure measurements with DAN, and studied the growth morphology at various temperatures. Vapor pressure data were obtained between 50 and 140 degrees C, employing a specially designed, non- contaminating, and computer-controlled experimental set-up. Thermal decomposition of DAN was found to set in around 90 degrees C. Crystal growth morphologies were monitored by optical microscopy at various temperatures. Smoothly faceted growth, indicating adequate surface mobility of adatoms, was obtained at temperatures above 115 degrees C. As a consequence, for crystal growth at this high temperature, continuous removal of decomposition products is required to sustain practical growth rates.

Paper Details

Date Published: 12 July 1996
PDF: 6 pages
Proc. SPIE 2809, Space Processing of Materials, (12 July 1996); doi: 10.1117/12.244340
Show Author Affiliations
Maria Ittu Zugrav, Univ. of Alabama in Huntsville (United States)
Franz Rosenberger, Univ. of Alabama in Huntsville (United States)

Published in SPIE Proceedings Vol. 2809:
Space Processing of Materials
Narayanan Ramachandran, Editor(s)

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