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Int. J. Electroactive Mater. 1 (2013) 28-35

Effect of cetyltrimethyl ammonium bromade surfactant concentration on the physical and photoelectrochemical property of TiO2 nanowire

M.Y.A. Rahman1*, A.A. Umar1, L. Roza2, M.M. Salleh1

1Institute of Micoengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
2College of Foundation and General Studies, Universiti Tenaga Nasional, Kajang, Selangor, Malaysia

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Abstract : Cetyltrimethyl ammonium bromade (CTAB) surfactant was used to modify the morphology of TiO2 thin film nanowire prepared by a simple technique, namely, liquid phase deposition (LPD) during its growth process. In order to obtain various surface morphologies of TiO2 nanowires, the concentration of CTAB was varied from 7 to 10 mM. It was found that with the increase in the concentration of CTAB, the morphology of TiO2 nanowire in term of its diameter decreases due to the particles agglomeration grown on the surface. The TiO2 nanowires with various diameters were then utilized as photovoltaic materials in a photoelectrochemical cell. The highest performance of the cell in term of the short- circuit current density, Jsc was 0.100 mAcm-2. This result was achieved from the TiO2 nanowire cell with the smallest grain size, (6±2) nm. The Jsc of the cell increases with the increase in concentration of CTAB.

Keywords : grain size,CTAB,photoelectrochemical cell