Bonding, vibrational, and electrical characteristics of CdS nanostructures embedded in polyvinyl alcohol matrix
- 1. Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur-721 302 (India)
- 2. Laboratory for Mechanical Systems Engineering EMPA, Duebendorf, Zurich, CH-8600 (Switzerland)
Description
CdS nanocomposites have been grown in polyvinyl alcohol matrix by a chemical synthesis process. The transmission electron micrographs of nanocomposites synthesized at 70-90 deg. C temperature showed the growth of needlelike and junctionlike nanostructures. X-ray photoelectron spectroscopy analysis revealed the growth of stoichiometric CdS without the formation of any intermediate phases at the CdS-polyvinyl alcohol interface. Raman spectra of first order longitudinal optical phonon peak has been analyzed using phonon dispersion model to detect the surface phonon modes in CdS nanoneedles and wires. The origin of negative differential resistance behavior in current-voltage characteristics for junctionlike CdS nanocomposites has been discussed.
Additional details
Identifiers
- DOI
- 10.1063/1.3111971;
Publishing Information
- Journal Title
- Journal of Applied Physics
- Journal Volume
- 105
- Journal Issue
- 8
- Journal Page Range
- p. 084309-084309.5
- ISSN
- 0021-8979
- CODEN
- JAPIAU
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41090498
- Subject category
- S77: NANOSCIENCE AND NANOTECHNOLOGY;
- Descriptors DEI
- CADMIUM SULFIDES; CHEMICAL BONDS; COMPOSITE MATERIALS; CRYSTAL GROWTH; ELECTRIC POTENTIAL; ELECTRONS; PHONONS; PVA; QUANTUM WIRES; RAMAN SPECTRA; SEMICONDUCTOR MATERIALS; STOICHIOMETRY; TRANSMISSION ELECTRON MICROSCOPY; X-RAY PHOTOELECTRON SPECTROSCOPY
- Descriptors DEC
- ALCOHOLS; CADMIUM COMPOUNDS; CHALCOGENIDES; ELECTRON MICROSCOPY; ELECTRON SPECTROSCOPY; ELEMENTARY PARTICLES; FERMIONS; HYDROXY COMPOUNDS; INORGANIC PHOSPHORS; LEPTONS; MATERIALS; MICROSCOPY; NANOSTRUCTURES; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PHOSPHORS; PHOTOELECTRON SPECTROSCOPY; POLYMERS; POLYVINYLS; QUASI PARTICLES; SPECTRA; SPECTROSCOPY; SULFIDES; SULFUR COMPOUNDS
Optional Information
- Notes
- (c) 2009 American Institute of Physics