Investigations on the optical, thermal and surface modifications of electron irradiated l-threonine single crystals

Kumar, G. Ramesh; Raj, S. Gokul; Bogle, Kashinath A.; Dhole, S.D.; Bhoraskar, V.N.; Mohan, R.

doi:10.1016/j.apsusc.2008.02.030

Cited by 12 publications

(1 citation statement)

References 18 publications

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“…The increase in the SHG output at higher fluence implies that higher concentration of free radicals favours the movement of unpaired electrons along the radical sites, which increases the second-order polarizability of the molecular crystal. CH and NH 2 radicals produced after irradiation were trapped in the crystal lattice, and the concentration of free electron radicals is proportional to the radiation dose absorbed by the sample [13,14]. A similar observation has been reported for L-alanine and L-threonine single crystals [10,[15][16][17].…”

Section: Shg Measurementsupporting

confidence: 62%

Electron irradiation effects on 4-amino-5-mercapto-3-[1-(4-isobutylphenyl)ethyl]-1,2,4-triazole single crystal

Rao

Naseema

2010

Pramana - J Phys

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In this paper, we report the electron irradiation effects on the properties of an organic NLO single crystal of 4-amino-5-mercapto-3-[1-(4-isobutylphenyl)ethyl]-1,2,4-triazole. The crystal was irradiated with electron beam of different doses and was characterized by powder XRD, UV-Vis, FTIR, DSC, microhardness and SHG measurements. In XRD, the peaks are shifted due to irradiation. The SHG efficiency has been found to enhance rapidly with irradiation. The investigation of the influence of electron irradiation on the surface morphology of the grown crystal reveals the formation of craters on the surface. The laser damage threshold remains constant as the dose rate increases whereas refractive index increases after irradiation.

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