A Comparative Study on Solution- and Bridgman-Grown Single Crystals of Benzimidazole by High-Resolution X-ray Diffractometry, Fourier Transform Infrared, Microhardness, Laser Damage Threshold, and Second-Harmonic Generation Measurements

• DOI: 10.1021/cg060002g
• Publication Date: 2006-06-07T04:49:45Z
• Authors: N. Vijayan; G. Bhagavannarayana; R. Ramesh Babu; R. Gopalakrishnan; K. K. Maurya; P. Ramasamy
• Keywords: Crystal (programming language); Etch pit density

Nowadays more attention has been paid to the growth of organic nonlinear optical single crystals due their high efficiency and fairly good damage threshold comparable that inorganic counterparts. The benzimidazole (BMZ) grown by slow evaporation solution technique (SEST) vertical Bridgman (VBT) were characterized, results have compared. Characterization made high-resolution X-ray diffractometry (HRXRD), Fourier transform infrared (FTIR), laser threshold, microhardness, second-harmonic generation (SHG) measurement studies. diffraction curves (DCs) recorded an in-house developed multicrystal diffractometer (MCD) revealed both methods contain internal structural grain boundaries. However, VBT normally multiple low angle (tilt α ≥ 1 arc min) boundaries thermal stress caused during cooling cycle difference in lattice expansion coefficients glass tube crystal, whereas SEST found only one very (α < boundary probably entrapment solvent crystal growth. From FTIR studies, it was packing molecules is dense case VBT-grown than SEST-grown crystals. Vicker's microhardness measurements along [100] direction, superior mechanical behavior observed correlated with values.