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@ARTICLE{Nesheva:57069,
author = {Nesheva, D. and Aneva, Z. and Reynolds, S. and Main, C. and
Fitzgerald, A. G.},
title = {{P}reparation of micro- and nanocrystalline {C}d{S}e and
{C}d{S} thin films suitable for sensor applications},
journal = {Journal of optoelectronics and advanced materials},
volume = {8},
issn = {1454-4164},
address = {Bucharest},
publisher = {INOE $\&$ INFM},
reportid = {PreJuSER-57069},
pages = {2120 - 2125},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {Thin films of CdS (30-200 nm) and CdSe (10-100 nm) are
prepared by physical vapour deposition using one-step (for
CdS and CdSe) or step-by-step (for CdSe only) approach.
Atomic force microscopy measurements reveal a grain size
decrease with decreasing layer thickness. The effect is
strongest in the step-by-step CdSe layers. Raman scattering
measurements show an anticipated gradual increase of the
scattered light from CdS layers with thickness and a
non-monotonous change in the CdSe group, the intensity is
strongest for the '50 nm' 'step-by-step' CdSe layer. This
observation is ascribed to a size-induced increase of the
optical band gap of a part of the microcrystals whose
estimated size is similar to 8 nm. Room temperature
investigations of the effect of exposure to a set of vapours
(water, ethanol, ammonia, acetone, iodine) on the dc dark
and steady state photoconductivity of CdS layers show a
reasonable response of all US layers to water vapour. CdSe
layers are rather insensitive with the exception of the '50
nm' layer, as the 'step-by-step' layer shows the best
sensitivity to all vapours. The observed good
gas-sensitivity of the 'step-by-step' CdSe layers is
ascribed to a much greater integral interface area between
nanocrystals and indicates that 'step-by-step' deposition of
CdSe layers is quite promising for gas-sensor applications.},
keywords = {J (WoSType)},
cin = {IPV},
ddc = {530},
cid = {I:(DE-Juel1)VDB46},
pnm = {Erneuerbare Energien},
pid = {G:(DE-Juel1)FUEK401},
shelfmark = {Materials Science, Multidisciplinary / Optics / Physics,
Applied},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000242568300028},
url = {https://juser.fz-juelich.de/record/57069},
}