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Synthesis of PVA capped hexagonal CdS nanocrystals at Room temperature

Author Affiliations

  • 1 Department of Physics, Gauhati University, Guwahati-781014, Assam, INDIA

Res. J. Material Sci., Volume 2, Issue (6), Pages 1-4, December,16 (2014)


Cadmium sulphide nanocrystals with Cd:S molar ratio 0.02:0.02 and 0.04:0.04 has been synthesized by chemical coprecipation method at room temperature using poly vinyl alcohol (PVA)as capping agent. The crystallite sizes are determined from XRD analysis. The X-ray diffraction analysis confirms that hexagonal phase cadmium sulphide nanocrystals are formed. The average crystallite sizes are found to be6 nm. From UV-visible spectra the band gap is found to be between 2.53-2.56 eV indicating a significant blue shift from it bulk band gap energy 2.42 eV.


  1. Chen Q., Bao H. and Shen X., Phase transition of CdS in the presence of ethylenediamine and formation of hollow CdS submicron particles with needle-like structure, Phase trans., 81, 591-601(2008)
  2. Singh V. and Chauhan P., Synthesis and structural properties of wurtzitetype CdS nanoparticles, Chalc. Lett., 6(8) 421-426 (2009)
  3. Morales-Acevedo A., Thin film CdS/CdTe solar cells: Research perspectives, Sol. Ener. doi:10.1016/ j.solener.2005.10.008 (2005)
  4. Murai H., Abe T., Matsuda J., Sato H., Chiba S. and Kashiwaba Y., Improvement in the light emission characteristics of CdS: Cu/CdS diodes, Appl. Surf. Sci., 244, 351(2005)
  5. Wang Y., Ramanathan S., Fan Q., Yun F., Morkoe H. and Bandyopadhyay S., Electric Field Modulation of Infrared Absorption at Room Temperature in Electrochemically Self Assembled Quantum Dots, J. Nanosci. Nanotechnol. 6(7) 2077-2080 (2006)
  6. Ponzoni A., Comini E., Sbervcglieri G., Zhou J., Deng Z.S., Xu N.S., Ding Y. and Wang Z.L, Ultrasensitive and highly selective gas sensors using three-dimensional tungsten oxide nanowire networks, Appl. Phys. Lett., 88, 203101 (2006)
  7. Zhong Z.H., Wang D.L., Cui Y., Bockrath M.W. and Lieber M.C, Nanowire Crossbar Arrays as Address Decoders for Integrated Nanosystems, Science, 302, 1377-1379 (2003)
  8. Duan X., Huang Y., Agarwal R. and Lieber C.M., Single-nanowire electrically driven lasers, Nature, 421, 241-245 (2003)
  9. Kelley A.M., Dai Q., Jiang Z., Baker J.A. and Kelley D.F., Resonance Raman spectra of wurtzite and zincblende CdSenanocrystals, Chem. Phys., 422, 272-276 (2013)
  10. Ghosh A., Paul S. and Raj S., Structural phase transformation from wurtzite to zinc-blende in uncapped CdS nanoparticles, Sol. Stat. Comm., 154, 25-29 (2013)
  11. Sahu N., Arora M.K., Upadhyay S.N. and Sinha A.S.K., Phase Transformation and Activity of Cadmium Sulfide Photocatalysts for Hydrogen Production from Water:  Role of Adsorbed Ammonia on Cadmium Sulfate Precursor, Industrial and engineering chemistry research, 37(12), 4682-4688 (1998)
  12. Angel O.Z and Morales R.L, Sphalerite-wurtzite phase transformation in CdS, Phys. Rev. B 62 13064 (2000)
  13. Bodo B. and Kalita P.K., Structural and Optical Properties of ZnS:Cu Transparent Nanosheets, Res. J. Physical Sci., 1(1) 2-5 (2013)
  14. Kumar A.G., Reddy R.V.M. and Reddy N.K, Structural, Optical and Electrical Characteristics of Nanostructured ZnO Thin Films with various Thicknesses deposited by RF Magnetron Sputtering, Res. J. Physical Sci., 1(6), 17-23(2013)
  15. Senapati U.S., Jha D.K. and Sarkar D, Green Synthesis and Characterization of ZnS nanoparticles, Res. J. Physical Sci., 1(7) 1-6 (2013)
  16. Sivaraman T., Nagarethinam V.S. and Balu A.R., CdS thin films Fabricated by a simplified Spray technique from different Substrate Temperatures – Structural, Morphological, Optical and Electrical analysis, Res. J. Mater. Sci. 2(2) 6-15 (2014)
  17. Harish G.S., Divya A., Kumar S.K. and Reddy S.P., Synthesis and Characterization of Water Soluble ZnS: Ce, Cu co-Doped Nanoparticles: Effect of Polyvinyl Alcohol Concentration, Res. J. Physical Sci., 1(7), 7-10 (2013)