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Surfactant free synthesis of anisotropic gold nanostructures: Can dicarboxylic acids alone acts as shape directing agents

Publication Type : Journal Article

Publisher : RSC Advances

Authors : Dr. Darbha Venkata Ravi Kumar, Vidya Chamundeswari , Partha Pratim Patra , Sanjay Kumavat

Url : http://dx.doi.org/10.1039/c3ra43974g

Campus : Chennai

School : School of Engineering

Department : Chemistry

Verified : No

Year : 2013

Abstract : The present study describes the synthesis of gold nanostructures using different dicarboxylic (viz. oxalic, malonic, succinic, glutaric and adipic) acids as reducing agents in the absence of any other additives or surfactants. Various anisotropic structures such as kites, tadpoles, triangular/hexagonal plates, and twinned particles were seen to evolve depending on the molar ratio of dicarboxylic acid to HAuCl4 used. It was also demonstrated that gold nanostructure formation is hampered as the chain length/distance between two carboxylic acid groups increases. Among the various structures obtained the kite like structures displayed the largest surface enhanced Raman enhancement factors.

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