Characterization of CdS and ZnS Quantum Dots Prepared via A Chemical Method on SBR Latex
Characterization of CdS and ZnS Quantum Dots Prepared via A Chemical
Method on SBR Latex
S.S. Nath, D. Chakdar, G. Gope and D K Avasthi
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Submitted: March 6th, 2008
Posted: May 12th, 2008
Materials and Methods:
Results and Discussion
The synthesis of CdS and ZnS quantum dots via a chemical route is reported. CdS and ZnS
specimens were produced by chemical reactions where Styrene Butadane Rubber (SBR) latex
matrix plays the key role in controlling particle growth during synthesis. The samples have
been analyzed by UV/VIS absorption spectroscopy and High Resolution Transmission Electron
Microscopy. These characterization techniques indicate the formation of quantum dots with a
particle size less than 10nm. Impedance analysis of the samples is also carried out to reveal
the variation of admittance (impedance) with frequency. These results indicate their potential
application in electronics as nano tuned devices and nano high pass filters.
Key words: Blue shift, SBR latex, Quantum confinement, Electronic filter, Tuned device.
Synthesis of semiconductor quantum dots, characterization and their various applications are
the frontier research areas at present [1-12]. Different techniques like MBE (Molecular beam
epitaxy), RF (Radio Frequency) sputtering, LPE (Liquid Phase Epitaxy) etc. can be used to
synthesize semiconductor quantum dots but the chemical route has been found to be the most
attractive method due to its numerous advantages [2-3].
In the present investigation, the