Investigations on synthesis, growth and physicochemical properties of semi-organic NLO crystal bis(thiourea) ammonium nitrate for nonlinear frequency conversion
| Autor: | R. Gunaseelan, M. Allen Mosses, R. Ravisankar, M. Prabhakaran, S.M. Ravi Kumar, M. Packiya raj, A. Anbarasi, G.J. Shanmuga Sundar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Analytical chemistry Second-harmonic generation 02 engineering and technology Dielectric Crystal structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Crystal chemistry.chemical_compound Thiourea chemistry 0103 physical sciences Orthorhombic crystal system Electrical and Electronic Engineering 0210 nano-technology Thermal analysis Single crystal |
| Zdroj: | Physica B: Condensed Matter. 522:31-38 |
| ISSN: | 0921-4526 |
| Popis: | Bis(thiourea) ammonium nitrate (BTAN), a new nonlinear optical crystal was grown successfully by slow evaporation technique using water as solvent at room temperature. The grown crystals were optically good quality with dimensions upto 10 × 6 × 3 mm3. Single crystal X-Ray diffraction analysis reveals that the crystal lattice is orthorhombic. From Powder X-ray diffraction analysis the diffraction planes have been indexed. The presence of the various functional groups of BTAN was identified through FTIR spectroscopic analysis. UV cut-off wavelength was observed from optical absorbance spectrum and it was found to be 240 nm. Second harmonic efficiency was determined using Kurtz powder method in comparison with KDP to confirm the nonlinearity of the material. Thermal analysis confirmed that grown crystal is thermally stable upto 184 °C. Microhardness studies show that hardness number (Hv) increases with load. Conductivity measurements such as dielectric, ac and photoconductivity were studied. Growth mechanism and surface features of the as grown single crystal was analysed by chemical etching analysis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect