Open Access Nano Express

Biosynthesis of Gold Nanoparticles by Foliar Broths: Roles of Biocompounds and Other Attributes of the Extracts

Yao Zhou123, Wenshuang Lin123, Jiale Huang1, Wenta Wang123, Yixian Gao123, Liqin Lin123, Qingbiao Li123*, Ling Lin123 and Mingming Du123

Author Affiliations

1 Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, People’s Republic of China

2 National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen University, 361005, Xiamen, People’s Republic of China

3 Key Lab for Chemical Biology of Fujian Province, Xiamen University, 361005, Xiamen, People’s Republic of China

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Nanoscale Research Letters 2010, 5:1351-1359  doi:10.1007/s11671-010-9652-8

Published: 15 June 2010

Abstract

Biosynthesis of nanoparticles has arisen as a promising alternative to conventional synthetic methodologies owing to its eco-friendly advantages, and the involved bioprotocol still needs further clarification. This research, for the first time from the standpoint of statistics, confirmed an electrostatic force or ionic bond-based interaction between the chloroauric ions and the involved bioconstituents and manifested that reducing sugars and flavonoids were both important reductants responsible for conversion of Au(III) to Au(0). The result also demonstrated that the proteins were not the reducing agents, yet they might be protection agents in biosynthesis of gold nanoparticles (GNPs). Besides, a significant linear relationship was found between the anti-oxidant ability of the foliar broths and their capability to reduce Au(III) into Au(0). Furthermore, the preliminary investigation based on the boxplot on the size/shape distribution of the biosynthesized GNPs revealed that gold nanospheres with higher degree of homogeneity in size tended to be promoted by foliar broths containing higher content of reducing sugars/flavonoids and proteins. Otherwise, i.e., for those broths with lower content of the above biocompounds, sphere GNPs of wider size distribution or even gold nanotriangles tended to be fabricated.

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Electronic supplementary material. The online version of this article (doi:10.1007/s11671-010-9652-8) contains supplementary material, which is available to authorized users.

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Keywords:
Foliar broths; Biocompounds; Biosynthesis; Gold nanoparticles; Statistical