Crystal Research and Technology
Cryst. Res. Technol. 41, 766 (2006) - Abstract -

Growth and characterization of pure and metal doped bis(thiourea) zinc chloride single crystals

S. Selvakumar, K. Rajarajan, S. M. Ravi Kumar, I. Vetha Potheher, D. Prem Anand, K. Ambujam*, and P. Sagayaraj

Department of Physics, Loyola College, Chennai - 600 034, India
*Department of Physics, Queen Mary’s College, Chennai - 600 004, India

Keywords slow evaporation, NLO, metallic dopants, optical absorption, FTIR, photoconductivity
PACS 81.10.-h
DOI 10.1002/crat.200510665

Metal (Cd2+ and Cu2+) substituted single crystals of Bis(thiourea) zinc chloride (BTZC) are grown by slow solvent evaporation technique, with the vision to improve the physicochemical properties of the sample. Single crystal XRD studies of both pure and doped samples are carried out and the results are compared. Optical absorption and FTIR studies are performed to identify the UV cut-off range and the presence of various functional groups in the grown crystals. The thermogravimetric (TG) analysis of metal doped BTZC indicates a marginal increase in the thermal stability of the crystals. The dielectric response of the samples have been studied in the frequency range 100 Hz to 5 MHz at room temperature and the results are discussed. Photoconductivity studies carried out on pure and metal doped BTZC crystals revealed the negative photoconducting nature.




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