Antimony Sulphoiodide is most widely studied compound in group V-VI-VII family due to its large number of properties. Varoius methods of synthesis have been reported. We are the first to report synthesis of shiny SbSI crystals by the Chemical Vapor Deposition (CVD) technique using powder of Antimony, Sulphur and Iodine as the starting material. Needle shaped thin crystals of SbSI were found grown vertically on the walls of the quartz tube. Characterizations of the sample were done using different techniques such as powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX). The charcteristcs peaks in

Needle shaped SbTeI crystals were obtained by solid state reaction. Electrical resistance was measured in the temperature range of 4 K to 550 K. SbTeI shows a metallic behavior from 4 K to 300 K, and at higher temperature (>300 K), it shows semiconducting behavior. Unlike SbSI, this material shows almost zero resistance around 550 K. It shows a piezoelectric behavior with a capacitance of 717 pF and its carrier density and nobilities are found to be 2.12 × 1016 cm−3 and 1.01 cm2/(V·s), respectively. Crystals of SbTeI are characterized by XRD, SEM, and Raman analysis. Electrical activation energy is found to be 0.52 eV. It is suggested that this material may be studied for its application as a superconductor with Tc higher than room temperature.

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Thin films of carbon nanotubes were synthesized from natural plant derived precursors such as camphor, mustard oil, castor oil, coconut oil, turpentine oil and menthol on quartz substrate by hot wire CVD. Morphological and compositional properties were studied by using SEM and EDAX. Optical band gap and activation energy were also determined. Type of conductivity and carrier concentration were calculated by using Hall Effect measurement unit. Various experimental parameters like precursor, deposition time, quantity of precursor, current through coil, etc., and their effect on band gap was studied. Out of the all precursors, camphor was found to be the best precursor for getting carbon thin films with optimized band gap value.

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