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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 937159, 5 pages
http://dx.doi.org/10.1155/2014/937159
Research Article

Effects of Surface Modification of Nanodiamond Particles for Nucleation Enhancement during Its Film Growth by Microwave Plasma Jet Chemical Vapour Deposition Technique

1Department of Mechanical Engineering and Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan
2Graduate Institute of Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei 106, Taiwan
3Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei 106, Taiwan
4School of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan

Received 13 September 2013; Revised 12 January 2014; Accepted 13 January 2014; Published 5 May 2014

Academic Editor: Ching-Song Jwo

Copyright © 2014 Chii-Ruey Lin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The seedings of the substrate with a suspension of nanodiamond particles (NDPs) were widely used as nucleation seeds to enhance the growth of nanostructured diamond films. The formation of agglomerates in the suspension of NDPs, however, may have adverse impact on the initial growth period. Therefore, this paper was aimed at the surface modification of the NDPs to enhance the diamond nucleation for the growth of nanocrystalline diamond films which could be used in photovoltaic applications. Hydrogen plasma, thermal, and surfactant treatment techniques were employed to improve the dispersion characteristics of detonation nanodiamond particles in aqueous media. The seeding of silicon substrate was then carried out with an optimized spin-coating method. The results of both Fourier transform infrared spectroscopy and dynamic light scattering measurements demonstrated that plasma treated diamond nanoparticles possessed polar surface functional groups and attained high dispersion in methanol. The nanocrystalline diamond films deposited by microwave plasma jet chemical vapour deposition exhibited extremely fine grain and high smooth surfaces (~6.4 nm rms) on the whole film. These results indeed open up a prospect of nanocrystalline diamond films in solar cell applications.