Modified Natural Rubber Induced Aqueous to Toluene Phase Transfer of Gold and Platinum ColloidsReport as inadecuate

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Journal of NanomaterialsVolume 2008 2008, Article ID 130295, 8 pages

Research ArticleNanoscience Research Laboratory, School of Chemical Sciences, University of Sains Malaysia, Penang 11800, Malaysia

Received 9 November 2007; Accepted 7 January 2008

Academic Editor: Zhili Xiao

Copyright © 2008 Mohamad Abu Bakar 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.


Citrate-stabilized gold and platinum particles were prepared in aqueous phase and transferred to toluene phase by employing 2-propanol as the transfer agent. It was found that the modified natural rubber ENR induced the phase transfer and assisted the dispersion of the citrate-free metal particles into the organic phase. The amounts of gold and platinum transferred are 93.4% and 86.1%, respectively. This phase transfer technique produced organosols of smaller particle sizes and narrower size distribution with self-assembly arrangements when compared to those prepared via the previous in situ preparations. The respective average particle size and standard deviation of gold before and after phase transfer were  nm and  nm, while for platinum they were  nm and  nm. The slight increase in the average sizes and overall size distributions in both metals after transfer was attributed to multiparticle aggregation in the organic phase.

Author: Mohamad Abu Bakar, Jamil Ismail, Cheng Hoon Teoh, Wei Leng Tan, and Noor Hana Hanif Abu Bakar



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