A facile route for preparation of CdS nanoparticles
CdS nanoparticles have been synthesized by a chemical reaction route using ethylenediamine as a complexing agent. The nanoparticles were characterized using techniques such as X-ray powder diffraction (XRD), scanning electron microscope (SEM), UV–VIS absorption spectroscopy, and photoluminescence...
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Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2007
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| Назва видання: | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Цитувати: | A facile route for preparation of CdS nanoparticles / M. Maleki, M. Sasani Ghamsari, Sh. Mirdamadi, R. Ghasemzadeh // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2007. — Т. 10, № 1. — С. 30-32. — Бібліогр.: 15 назв. — англ. |
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irk-123456789-1177692017-05-27T03:03:26Z A facile route for preparation of CdS nanoparticles Maleki, M. Sasani Ghamsari, M. Mirdamadi, Sh. Ghasemzadeh, R. CdS nanoparticles have been synthesized by a chemical reaction route using ethylenediamine as a complexing agent. The nanoparticles were characterized using techniques such as X-ray powder diffraction (XRD), scanning electron microscope (SEM), UV–VIS absorption spectroscopy, and photoluminescence spectroscopy. The absorption edge for the bulk hexagonal CdS is at 512 nm (2.42 eV). Comparing with the bulk CdS, it is believed that the blue shift in the absorption peak was caused by the quantum confinement effect. Photoluminescence measurements indicate CdS nanoparticles show fluorescence band with a maximum close to 315 nm. 2007 Article A facile route for preparation of CdS nanoparticles / M. Maleki, M. Sasani Ghamsari, Sh. Mirdamadi, R. Ghasemzadeh // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2007. — Т. 10, № 1. — С. 30-32. — Бібліогр.: 15 назв. — англ. 1560-8034 PACS 78.67.Bf, 81.16.-c http://dspace.nbuv.gov.ua/handle/123456789/117769 en Semiconductor Physics Quantum Electronics & Optoelectronics Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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English |
| description |
CdS nanoparticles have been synthesized by a chemical reaction route using
ethylenediamine as a complexing agent. The nanoparticles were characterized using
techniques such as X-ray powder diffraction (XRD), scanning electron microscope
(SEM), UV–VIS absorption spectroscopy, and photoluminescence spectroscopy. The
absorption edge for the bulk hexagonal CdS is at 512 nm (2.42 eV). Comparing with the
bulk CdS, it is believed that the blue shift in the absorption peak was caused by the
quantum confinement effect. Photoluminescence measurements indicate CdS
nanoparticles show fluorescence band with a maximum close to 315 nm. |
| format |
Article |
| author |
Maleki, M. Sasani Ghamsari, M. Mirdamadi, Sh. Ghasemzadeh, R. |
| spellingShingle |
Maleki, M. Sasani Ghamsari, M. Mirdamadi, Sh. Ghasemzadeh, R. A facile route for preparation of CdS nanoparticles Semiconductor Physics Quantum Electronics & Optoelectronics |
| author_facet |
Maleki, M. Sasani Ghamsari, M. Mirdamadi, Sh. Ghasemzadeh, R. |
| author_sort |
Maleki, M. |
| title |
A facile route for preparation of CdS nanoparticles |
| title_short |
A facile route for preparation of CdS nanoparticles |
| title_full |
A facile route for preparation of CdS nanoparticles |
| title_fullStr |
A facile route for preparation of CdS nanoparticles |
| title_full_unstemmed |
A facile route for preparation of CdS nanoparticles |
| title_sort |
facile route for preparation of cds nanoparticles |
| publisher |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| publishDate |
2007 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/117769 |
| citation_txt |
A facile route for preparation of CdS nanoparticles / M. Maleki, M. Sasani Ghamsari, Sh. Mirdamadi, R. Ghasemzadeh // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2007. — Т. 10, № 1. — С. 30-32. — Бібліогр.: 15 назв. — англ. |
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Semiconductor Physics Quantum Electronics & Optoelectronics |
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2025-07-08T12:46:15Z |
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| fulltext |
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2007. V. 10, N 1. P. 30-32.
© 2007, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
30
PACS 78.67.Bf, 81.16.-c
A facile route for preparation of CdS nanoparticles
M. Maleki1, M. Sasani Ghamsari2, Sh. Mirdamadi1, R. Ghasemzadeh1
1Department of Metallurgy and Material Engineering, Iran University Science & Technology
2Solid State Laser Division, Laser Research Center, 11365-8486, Tehran, Iran
E-mail: msghamsari@yahoo.com
Abstract. CdS nanoparticles have been synthesized by a chemical reaction route using
ethylenediamine as a complexing agent. The nanoparticles were characterized using
techniques such as X-ray powder diffraction (XRD), scanning electron microscope
(SEM), UV–VIS absorption spectroscopy, and photoluminescence spectroscopy. The
absorption edge for the bulk hexagonal CdS is at 512 nm (2.42 eV). Comparing with the
bulk CdS, it is believed that the blue shift in the absorption peak was caused by the
quantum confinement effect. Photoluminescence measurements indicate CdS
nanoparticles show fluorescence band with a maximum close to 315 nm.
Keywords: cadmium sulfide, nanoparticle, X-ray diffraction, absorption spectroscopy,
photoluminescence spectroscopy.
Manuscript received 25.12.06; accepted for publication 26.03.07; published online 01.06.07.
1. Introduction
Nanocrystalline semiconductor materials such as PbS
and CdS have attracted considerable attention due to
their unique properties, which are not present in bulk
materials [1-3]. These nanoparticles exhibit size
dependent properties (size quantization effects) such as a
blue shift of absorption onset, a change of
electrochemical potential of band edge, and an
enhancement of photocatalytic activities, with
decreasing crystallite size [4]. CdS, in particular, have
been extensively studied due to their potential
applications such as field effect transistors, light emitting
diodes, photocatalysis and biological sensors [4-6].
Many synthetic methods have been employed to prepare
CdS nanoparticles including soft chemical reaction,
solid-state reaction, sol-gel process, sonochemical
preparation [7-8], microwave heating [9], photoetching
[10] and reverse micelle [11]. In this investigation, we
have developed a new method to produce CdS
nanoparticles of small sizes using chemical reaction. The
nanoparticles are synthesized by reaction of ethylene-
diamine (C2H8N2) aqueous solution of cadmium acetate
dehydrate (C4H6O4Cd·2H2O) with Na2S. The as-
prepared particles were analyzed by X-ray diffraction
(XRD), scanning electron microscope (SEM), UV–VIS
absorption spectroscopy, photoluminescence (PL)
spectroscopy.
2. Experiment
Cadmium acetate dehydrate (C4H6O4Cd.
2H2O),
ethylenediamine (C2H8N2) were obtained from Merck.
Double distilled water and ethanol was used for washing
the particles. A typical procedure for the CdS
nanoparticles synthesis is as follows: appropriate amount
of analytically pure Cd(CH3COO)2·2H2O was dissolved
into a deaerated 35 mol. % aqueous solution of
ethylenediamine in a flask at room temperature. Then
under vigorous stirring, analytical pure Na2S was
quickly added to this solution, and a milk-white sol was
formed soon. Next, the resultant milk-white sol was
heated to 100 °C, and kept on stirring at this temperature
for about 6 hours until the milk white reaction mixture
gradually turned to a yellow colour. The final product
was then collected and washed with distilled water and
ethanol.
The X-ray powder diffraction (XRD) pattern was
recorded on Philips B.V (CuK- radiation λ = 0.154 nm),
employing scanning rate of 0.02 deg/s in 2θ range from
20 to 60º. The SEM images were recorded on Philips
XL30 scanning electron microscope. The sample used
for SEM observations were prepared by transferring the
particles that at first was dispersed in the ethanol to the
SEM stage. After allowing the evaporation of ethanol
from the stage, the particles on the stage were coated
with a thin layer of gold. UV–VIS absorption spectrum
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2007. V. 10, N 1. P. 30-32.
© 2007, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
31
Fig. 1. UV-VIS absorption spectrum of CdS nanoparticles
obtained by the offered route.
0
20
40
60
80
100
120
140
20 25 30 35 40 45 50 55 60
degree(2θ)
In
te
ns
ity
(a
u)
Fig. 2. XRD pattern of CdS nanoparticles.
Fig. 3. SEM images of CdS nanoparticles prepared by the
offered route.
Fig. 4. Photoluminescence emission spectrum of CdS
nanoparticles.
of the sample was recorded employing a double beam,
Hitachi, Japan, applying quartz cuvettes of the optical
path length 1 cm. The PL spectrum was achieved using
Hitachi X530 fluorescence spectrophotometer with a
220 nm excitation line.
3. Results and discussion
The UV-VIS absorption spectrum for the colloidal CdS
nanoparticles is shown in Fig. 1. According to mass
approximation method, the size of colloidal
nanoparticles 3-4 nm has been estimated. The sample
was dispersed in absolute ethanol by an ultrasonic
disperser. The absorption edge for the bulk hexagonal
CdS is at 512 nm (2.42 eV). Comparing with the bulk
CdS, it is believed that the blue shift in the absorption
peak was obviously caused by the quantum confinement
effect. The XRD pattern of the precipitated nanoparticles
was illustrated in Fig. 2. It can be attributed to hexagonal
CdS (JCPDS – file No. 10-0454). The broadened peaks
are indicating that the sizes of the particles are in
nanorange. In order to achieve more confirmative
information, the Debye–Scherer formula [12]
L = 0.9λ /B cosθ =34 nm
has been applied to calculate the size of the
nanoparticles. Here, L is the coherent length, λ is the
wavelength of X-ray radiation, B is the full-width at
half-maximum (FMWH) of the peak, and θ is the angle
of diffraction. In the case of spherical crystallites, the
corresponding crystallite size of nanoparticles obtained
in this way is 34 nm which confirms our findings in
SEM image (Fig. 3).
Fig. 4 shows the PL emission spectrum of an
absolute ethanol solution containing CdS nanoparticles
that are obtained by the offered route. The pattern
consists of one strong and narrow emission at 340 nm
using a 220 nm excitation wavelength. The lumi-
nescence at 340 nm may be attributed to a higher level
transition in CdS crystallites. It was reported that this
kind of band-edge luminescence is caused by the
recombination of excitons and/or shallowly trapped
electron-hole pairs [13].
The apparent blue shift and the strong peak are also
indicative of size quantization in as-prepared CdS
nanoparticles. In our synthetic system, the investigations
of CdS nanoparticles formation indicated that the
nucleation and growth were well controlled. Firstly,
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2007. V. 10, N 1. P. 30-32.
© 2007, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
32
ethylenediamine, as a strongly bidentating solvent, was
ready to form relatively stable Cd2+ complexes [14, 15].
Next, the Na2S generate S2- ions slowly and
homogeneously. The S2- ions will react with the Cd2+
ions that has chelated with ethylenediamine in a
reversible and effective pathway to produce small CdS
nanoparticles [16].
4. Conclusions
A simple method for preparation of CdS nanoparticles
by using a chemical reaction has been described. The
XRD pattern of CdS nanoparticles showed the materials
to be of the nanometric size regime with a
predominantly cubic phase. It was shown that the sizes
of nanoparticles are 30-40 nm. The CdS nanoparticles
showed blue shift in their UV-VIS absorption band edge.
The PL spectrum of CdS nanoparticles showed a fluo-
rescence band with a maximum at about 315 nm.
References
1. A. Henglein, Small-particle research: physico-
chemical properties of extremely small colloidal
metal and semiconductor particles // Chem. Rev.
89, p. 1861-1873 (1989).
2. A. Fukuoka, Y. Sakamoto, S. Guan, S. Inagaki,
N. Sugimoto, Y. Fukushima, K. Hirahara, S. Iijima,
M. Ichikawa, Novel templating synthesis of
necklace-shaped mono- and bimetallic nanowires
in hybrid organic-inorganic mesoporous material //
J. Amer. Chem. Soc. 123, p. 3373-3374 (2001).
3. C. Petit, M.P. Pilleni, Synthesis of cadmium sulfide
in situ in reverse micelles and in hydrocarbon gels
// J. Phys. Chem. 92, p. 2282-2286 (1988).
4. A.P. Alivisatos, Semiconductor clusters, nanocry-
stals, and quantum dots // Science 271, p. 933-937
(1996).
5. V.L. Kolvin, M.C. Schlamp, A.P. Alivisatos, Light
emitting diodes made from cadmium selenide
nanocrystals and a semiconducting polymer //
Nature 370, p. 354-357 (1994).
6. D.L. Klein, R. Roth, A.K.L. Lim, A.P. Alivisatos, A
single-electron transistor made from a cadmium sele-
nide nanocrystal // Nature 389, p. 699-701 (1997).
7. R.S. Mane, C.D. Lokhande, Chemical deposition
method for metal chalcogenide thin films // Mater.
Chem. Phys. 65, p 1-31 (2000).
8. G. Henshaw, I.P. Oarkin, G. Shaw, Convenient,
low-energy synthesis of metal sulfides and
selenides; PbE, Ag2E, ZnE, CdE (E = S, Se) //
Chem. Communs 27, p. 1095-1096 (1996).
9. Y. Wada, H. Kuramoto, J. Anand, T. Tikamura,
T. Sakata, H. Mori, S. Yanagida, Microwave-
assisted size control of CdS nanocrystallites // J.
Mater. Chem. 11, p. 1936-1940 (2001).
10. T. Torimoto, H. Kontani, Y. Shibutani, S. Kuwa-
bata, T. Sakata, H. Mori, H. Yoneyama // J. Phys.
Chem. 105, 6838 (2001).
11. A. Guinier, X-ray diffraction. Freeman, San
Francisco, CA, 1963.
12. L. Sapanhel, M.A. Anderson, Synthesis of porous
quantum-size cadmium sulfide membranes: photo-
luminescence phase shift and demodulation measu-
rements // J. Amer. Chem. Soc. 112, p. 2278-2284
(1990).
13. W. Wang, Y. Geng, P. Yan, F. Liu, Y. Xie,
Y. Qian, Preparation and characterization of CdS
nanoparticles by ultrasonic irradiation // Inorg.
Chem. Communs 4, p. 208-210 (2001).
14. X. Ge, Y. Ni, H. Liu, Q. Ye, Z. Zhang, γ-irradiation
preparation of cadmium selenide nanoparticles in
ethylenediamine system // Mater. Res. Bull. 36,
p. 1609-1613 (2001).
15. X. Guo-yue, W. Han, C. Chuan-wei, Synthesis of
single crystalline CdS nanowires with polyethylene
glycol 400 as inducing template // Nonferrous Met.
Soc., China, 16, p. 105-109. (2006)
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