Solid State Science and Technology, Vol. 16, No 1 (2008) 114-123

ISSN 0128-7389

Corresponding Author:




E. B. Saion1, A.H. Shaari1, M. A. Ali1, M. Y. Hussain1,

Ghazanfar Mirjalili1,3 and K. Dahlan2


1Department of Physics, Faculty of Science,

Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

2Malaysian Nuclear Agency (MNA), 43000, Bangi, Selangor, Malaysia

3Physics Department, Faculty of Science,Yazd University,

P.O.Box 89195-741 Yazd, Iran.



Conducting polymer polyaniline was synthesized by radiation method from casting films containing polyvinyl alcohol (PVA) blended with aniline hydrochloride. Upon - irradiation the films changed to PVA/polyaniline nanoparticles as shown by the SEM surface morphology. The UV-Visible spectrophotometer measurement revealed the absorption band of polyaniline peaking at 790 nm due to . * electronic transitions of conducting polyaniline molecules (polyemeraldine based) from donor atoms (HOMO) to acceptor atoms (LUMO). The band gap decreases from 1.15 eV at 0 kGy to 1.0 eV at 50 kGy indicating the conductivity of polyaniline increases with the increase of dose.


Nanocomposites of PVA/Ag0 nanoparticles were synthesized under ambient condition by radiation from composite of PVA/silver nitrate. The UV-vis spectroscopy revealed the absorbance peaking at 425 due to the plasmon transitions at the conduction band of Ag0 nanoparticles. The absorbance increases with dose indicating an increase of the number of Ag0 nanoparticles formed. The absorption peak shifted from 425 nm to 415 nm corresponds to a decrease in the diameter of Ag0 nanoparticles with increasing dose. The band gap of the PVA/Ag0 nanoparticles increases with increasing dose indicating the gap of conduction band of Ag0 nanoparticles increases as the diameter of Ag0 nanoparticles decreases.



[1]. Rosiak, J.M. (2003); Radiation polymerization in solution. Advances in

radiation chemistry of polymers. The Proceeding of a technical meeting IAEATECDOC-

1420. 13-17 September 2003, Indiana, USA. 41-60.

[2]. Berejka A.J. (2003); Electron beam grafting of polymers. Advances in radiation

chemistry of polymers. The Proceeding of a technical meeting IAEA-TECDOC-

1420. 13-17 September 2003, Indiana, USA. pp 85-89.

[3]. Heeger, Alan J. (1986); Polyacetylene, (CH)x: New Concepts and New Phenomena, Handbook of Conducting Polymers, Vol. 2, ed. T. Skotheim

(Marcel-Dekker, NY) . 729.

[4]. Heeger, Alan J. (1985); Charge storage in conducting polymers: Solitons,

Polarons and bipolarons. Polymer Journal 17 (1): 201-208.

[5]. Ran, S.S., M. Biswas. (2000); Water-dispersible conducting nanocomposites of

polyaniline and poly(N-vinylcarbazole) with nanodimentional zirconium

dioxide. Synthetic Metals, 108: 231-236.

[6]. Rao, P. S., Anand J., Palaniappan S. and Sathyanarayana D. N. (2000);

European Polymer Journal, 36: 915-920.

[7]. Gurunathan K., Murugan A.V., Marimuthu R., Mulik U.P., Amalnerkar D.P.

(1999); Electrochemically synthesized conducting polymer materials for

application towards trchnology in electronics, optoelectronics and energy stroge

devices. Materials Chemistry and Physics, 16: 173-191.

[8]. Wolszczak M., Kroh J. (1996); Influence of radiation on conducting polymers.

Radiat. Phys. Chem., 48: 114-116.

[9]. Sevil, U. A., Guven O., Birer O., H. Wernet W. (2000); Doping of 2-Cl-

Pani/PVA films by exposure to UV-radiation, -rays and e-beams. Synthetic

Metals 110: 175 179.

[10]. Saion E, Mohammed Ahmed Ali, Abdul Halim Shahri, Muhamad Y.H, Anuar

Kassim, Khairul Zaman Haji Dahlan, Shahri Hashim, Hamzah Harun, (2007);

Radiation Synthesis and Characterization of Conducting Polyaniline

Nanocomposites. MTAS2007 Materials Today Asian Conference. 2 5

September 2007, Loong Palace Hotel & Resort, Beijing, CHINA.

[11]. Krkljes A.N., Marinovic-Cincovic M.T., Kacarevic-Popovic Z.M., Nedeljkovic

J.M. (2007); Radiolytic synthesis and characterization of Ag-PVA

nanocomposites. European Polymer Journal, 43, 2171-2176.

[12]. Xiangling Xu, Yadong yin, Xuewu Ge, Hongkai Wu, Zhicheng Zhang (1998);

G-radiation synthesis of poly(acrylic acid)-metal nanoparticles. Materials

Letters, 37, 354-358.

[13]. Cho, Min, Seong, S.Y. Park, J.Y. Hwang, H.J. Choi. (2004); Synthesis and

electrical properties of polymer composites with polyaniline nanoparticles.

Material Science Engineering C 24: 15-18.

[14]. Mott N.F., E.A. Davis. (1979); Electronic process in non-crystalline materials

2nd. edition. Clarendon Press, Oxford UK.

[15]. Bogle, K A, S.D. Dhole and V. N. Bhoraskar1. (2006); Silver nanoparticles:

synthesis and size control by electron irradiation. Nanotechnology 17: 3204


[16]. Khanna, P.K., R. Gokhale, V.V.V.S. Subbarao. (2004); Poly(vinyl pyrolidone)

coated silver nano powder via displacement reaction. J. Mater. Sci. 39. 3773-


[17]. Porel, S, Singh S, Harsha S. S. and Rao D. N. (2005); Nanoparticle-Embedded

Polymer: In Situ Synthesis, Free-Standing Films with Highly Monodisperse

Silver Nanoparticles and Optical Limiting. Chemical Materials 17: 9-12.

[18]. Zhu, Jian. (2005); Theoretical study of the optical absorption properties of Au-

Ag bimetallic nanoparticles. Physics E 27: 296-301.