Effects of l-Cysteine in Zinc Bis Thiourea Acetate (ZBTA) Crystal Lattice

  • D. Kanimozhi
  • R. IndirajithEmail author


The current work deals with the synthesis and characterization of l-cysteine doped Zinc Bis Thiourea Acetate (ZBTA) crystals. The l-cysteine doped Zinc Bis Thiourea Acetate (ZBTA) reveals noticeable morphological changes due to various types of dopand. Lattice parameters were observed using single crystal x-ray diffraction (SXRD) and powder x-ray diffraction (PXRD). From the XRD data, it is clear that the Zinc Bis thiourea acetate (ZBTA) was crystallized in a monoclinic structure. The crystallite size and strain of the material were calculated using the Williamson-Hall plot (W-H plot). The existence of functional groups and vibrational modes of l-cysteine doped Zinc Bis thiourea acetate (ZBTA) crystals were predicted qualitatively by Fourier transform infrared spectroscopy. Optical properties were identified by recording the UV–Visible spectrum, showing that the crystal is transparent in the complete visible region. Various optical parameters were calculated. An etching and hardness test was performed to study the crystal growth nature and the strength of the crystal. Thermal analyses (TGA) of the present crystal were performed and identified that the material possessed good thermal stability up to 188°C. The second order non-linear optical efficiency (SHG) of the grown crystal was determined by powder Kurtz-Perry test, which confirmed that l-cysteine doped ZBTA possesses SHG properties. The laser damage threshold (LDT) analysis was performed using Nd: YAG laser with a wavelength of 1064 nm, and the laser damage threshold value of the crystal was found to be higher than that of standard KDP material. In the photoluminescence (PL) spectrum, sharp and broad peaks were identified; from the emission of colors, the l-cysteine doped ZBTA crystal was deemed suitable for applications in violet, blue and green color light emitting diodes. The energy corresponding to the particular wavelength was also calculated.


Crystal structure etching dielectric constant dielectric susceptibility photoluminescence seed crystals nonlinear optical 


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© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Department of PhysicsB.S. Abdur Rahman Crescent Institute of Science and TechnologyChennaiIndia

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