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Photon-induced tunable and reversible wettability of pulsed laser deposited W-doped ZnO nanorods

Published online by Cambridge University Press:  11 August 2011

B.D. Ngom ,
O. Sakho ,
S. Ndiaye ,
R. Bartali ,
A. Diallo ,
M.B. Gaye ,
S. Bady ,
N. Manyala ,
M. Maaza  and
A.C. Beye
B.D. Ngom*
Affiliation:
Groupes de Physique du Solide et Sciences des Matériaux (GPSSM), Faculté des sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114, Dakar-Fann, Dakar, Senegal NANO-Sciences Laboratories, Materials Research Department, iThemba LABS, National Research Foundation, South Africa
O. Sakho
Affiliation:
Groupes de Physique du Solide et Sciences des Matériaux (GPSSM), Faculté des sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114, Dakar-Fann, Dakar, Senegal
S. Ndiaye
Affiliation:
Groupes de Physique du Solide et Sciences des Matériaux (GPSSM), Faculté des sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114, Dakar-Fann, Dakar, Senegal
R. Bartali
Affiliation:
Fondazione Bruno Kessler – Centro Materiali e Microsistemi, Plasma and Advanced Material, Bio-MEMS, Via Sommarive 18, 38050 Povo, Trento, Italy
A. Diallo
Affiliation:
Groupes de Physique du Solide et Sciences des Matériaux (GPSSM), Faculté des sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114, Dakar-Fann, Dakar, Senegal
M.B. Gaye
Affiliation:
Groupes de Physique du Solide et Sciences des Matériaux (GPSSM), Faculté des sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114, Dakar-Fann, Dakar, Senegal
S. Bady
Affiliation:
Groupes de Physique du Solide et Sciences des Matériaux (GPSSM), Faculté des sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114, Dakar-Fann, Dakar, Senegal
N. Manyala
Affiliation:
Department of Physics, Institute of Applied Materials, University of Pretoria, Pretoria, 0002, South Africa
M. Maaza
Affiliation:
NANO-Sciences Laboratories, Materials Research Department, iThemba LABS, National Research Foundation, South Africa
A.C. Beye
Affiliation:
Groupes de Physique du Solide et Sciences des Matériaux (GPSSM), Faculté des sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B.P. 25114, Dakar-Fann, Dakar, Senegal
*
ae-mail: ngom@emt.inrs.ca; bdngom@gmail.com
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Abstract

ZnO nanorods arrays were prepared on soda lime glass substrate by pulsed laser deposition method. Hexagonal rod-like ZnO rods were obtained under different conditions. Well-defined ZnO nanorods arrays were selected among different samples having various morphologies and sizes already studied by X-ray diffraction (XRD) and atomic force microscopy (AFM). Here, we report on the contact angle measurement (CAM) of one of these samples. A systematic change of the surface wettability is observed in W-doped ZnO nanostructures. The water contact angle (WCA) of a 1 wt.% of WO3 target content was found to be the transition doping level from hydrophilic surface to a hydrophobic surface. We attributed the transition in surface wettability of the film with the doping to incorporation increase of tungsten into the film. Such characteristic surface wettability can play a key role in the adhesion of various layers on W-ZnO nanorods arrays for optoelectronic device applications.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 55 , Issue 2: International Symposium on Flexible Organic Electronics 2010 (ISFOE) , August 2011 , 20501
Copyright
© EDP Sciences, 2011

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