Eur. Phys. J. Appl. Phys.
Volume 42, Number 2, May 2008
|Page(s)||113 - 119|
|Section||Nanomaterials and Nanotechnologies|
|Published online||09 April 2008|
Frequency dependent electrical characteristics of PbS quantum dots
Dept. of Physics, Gauhati University, Guwahati, Assam-781014, India
2 Dept. of Physics, Tezpur University, Napaam, Tezpur, Assam-784028, India
3 Gauhati University, Guwahati, Assam 781014, India
Corresponding author: email@example.com
Revised: 28 March 2007
Accepted: 29 January 2008
Published online: 9 April 2008
PbS quantum dots (bare and silica coated) have been synthesized in PVA matrix with average size 10 nm and 9 nm. The capacitance-voltage (C − V) and current –voltage (I − V) response of both bare and coated quantum dots have been recorded in different frequency range (Hz–MHz). Both the samples show frequency dependent response except in case of C − V characteristics at MHz range. The I − V responses at low frequency range exhibit step like structures which could be attributed to 'Coulomb blockade'.
PACS: 73.63.Kv – Quantum dots / 82.35.Np – Nanoparticles in polymers / 61.05.cp – X-ray diffraction
© EDP Sciences, 2008
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