Shakir, Mohd. and Riscob, B. and Maurya, K. K. and Ganesh, V. and Wahab, M. A. and G. , Bhagavannarayana (2010) Unidirectional growth of l-asparagine monohydrate single crystal: First time observation of NLO nature and other studies of crystalline perfection, optical, mechanical and dielectric properties. Journal of Crystal Growth, 312 (21). pp. 3171-3177. ISSN 0022-0248

PDF - Published Version Restricted to Registered users only Download (907Kb) | Request a copy

Abstract

L-asparagine monohydrate (LAM), a new amino acid single crystal, was grown by slow evaporation solution technique (SEST) as well as by recently invented Sankaranarayanan–Ramasamy (SR) method in aqueous medium. Using SR method, LAM single crystal of diameter ∼18 mm and length ∼52 mm was grown for the first time. The growth conditions were optimized and the maximum growth rate of 1.0 mm per day was observed for the SR crystal. The crystal structure was confirmed by powder XRD. The crystalline perfection was assessed by high resolution XRD and etching studies and found that the quality of the SR crystal is better than the SEST crystal. The UV–vis–NIR spectroscopic study revealed that the SR crystal has good optical transparency than that of SEST crystal. The relative second harmonic generation efficiency was measured and found to be ∼0.35 times to that of KDP. The laser damage threshold (LDT) was measured and found that the SR crystal has higher LDT value (5.76 GW cm−2) than SEST crystal (4.75 GW cm−2). The Vickers’s microhardness and dielectric studies were also carried out and discussed.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Subjects:	Crystallography Materials Science Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	24 Jul 2012 08:57
Last Modified:	24 Jul 2012 08:57
URI:	http://npl.csircentral.net/id/eprint/378

Actions (login required)

View Item