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A Vibrational Investigation of Crystal Nucleation and Growth from a Physically Confined and Supercooled Liquid

Published online by Cambridge University Press:  15 February 2011

R. Mu ,
D. O. Henderson ,
Z. Pan  and
Y. Xue
R. Mu
Affiliation:
Department of Physics, Fisk University, Nashville, TN 37208
D. O. Henderson
Affiliation:
Department of Physics, Fisk University, Nashville, TN 37208
Z. Pan
Affiliation:
Department of Physics, Fisk University, Nashville, TN 37208
Y. Xue
Affiliation:
Department of Physics, Fisk University, Nashville, TN 37208
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Abstract

Temperature dependent Raman measurements were conducted on bulk and the confined 2,4,6-trinitrotoluene (TNT) in 2.5, 5, 10, and 20 nm porous silica. Two bands at 23 and 190 cm−1 were chosen to evaluate the structure and the melting and freezing transitions of the confined TNT in pores. The results show that the solid phase TNT confined in larger pores (dp > 5 nm) forms conventional solid TNT structure, while the TNT restricted in small pores has no freezing and melting transition characteristics. The results also suggest that the freezing transition of the confined TNT starts at the pore center and the confined TNT maintains its interconnectivity during the freezing transition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 366: Symposium N – Dynamics in Small Confining Systems , 1994 , 289
Copyright
Copyright © Materials Research Society 1995

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