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Nucleation kinetics, chemical etching, Sem, Edax and mechanical studies of 3-methyl 4-methoxy 4-nitrostilbene (MMONS): A potential nonlinear optical crystal
Dinakaran P.M.,
Published in
2013
Volume: 5
   
Issue: 1
Pages: 262 - 270
Abstract
The 3-methyl 4-methoxy 4-nitrostilbene (MMONS) material has been synthesized and unidirectional (001) MMONS single crystals were grown for the first time by Sankaranarayanan-Ramasamy (SR) method. The solubility of MMONS has been determined at different temperatures in ethyl methyl ketone. The metastable zone width and induction period measurements have been determined carried out experimentally. The induction period decreases with increase of supersaturation. The nucleation parameters such as energy change per unit volume (ΔGV), critical free energy (ΔG*), radius of the critical nucleus (r*), the number of molecules in the critical nucleus (i*) and nucleation rate (J) have been evaluated. Interfacial energy has been calculated for different temperatures from the existing solubility data. It is observed that the nucleation rate increases with the increase of supersaturation ratio. The grown crystal was characterized by chemical etching, SEM and EDAX analyses and laser damage threshold measurement. SEM analysis with 3μm and 4μm scale reveals the rectangular and oval shape on the surface of grown micro crystals. The presence of chemical components has been identified by EDAX analysis. The laser damage threshold of 154.812 MWcm-2 has been measured by irradiating the (001) crystal plane using a Q-switched Nd: YAG laser (1064nm).
About the journal
JournalInternational Journal of ChemTech Research
ISSN09744290
Open AccessNo