Toward efficient crystal growth of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) in space: vapor pressure measurements and growth morphology studies

Maria Ittu Zugrav; Franz Rosenberger

doi:10.1117/12.244340

12 July 1996 Toward efficient crystal growth of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) in space: vapor pressure measurements and growth morphology studies

Maria Ittu Zugrav, Franz Rosenberger

Author Affiliations +

Proceedings Volume 2809, Space Processing of Materials; (1996) https://doi.org/10.1117/12.244340
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

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Maria Ittu Zugrav and Franz Rosenberger "Toward efficient crystal growth of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) in space: vapor pressure measurements and growth morphology studies", Proc. SPIE 2809, Space Processing of Materials, (12 July 1996); https://doi.org/10.1117/12.244340

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