Bovine Serum Albumin as an Effective Surface Regulating Biopolymer for Morphology Control of Gold Polyhedrons

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Morphology control of gold nanocrystals was successfully carried out via a modified polyol process using bovine serum albumin (BSA) as a surface regulating biopolymer. By combining a small amount of AgNO3 as an additive, BSA yielded regular Au octahedrons, cubes, and higher polygons owing to the underpotential deposition of Ag species onto {100} facets. Unexpectedly, a uniform tetrahexahedral morphology that had high-index facets of {740} and {210} on the surface was formed at a relatively high concentration of AgNO3 with BSA, and was due to the coordination power of BSA to a gold surface weaker than that of poly(vinyl pyrrolidone). The resulting gold polyhedrons were aggregated after the synthesis because of the partial denaturation of BSA, but the simple surface exchange with 11-mercaptoundecanoic acid enabled a stable dispersion in aqueous solution.
Publisher
AMER CHEMICAL SOC
Issue Date
2013-09
Language
English
Article Type
Article
Keywords

NOBLE-METAL NANOPARTICLES; HIGH-INDEX FACETS; ELECTROCATALYTIC ACTIVITY; PLATINUM NANOCRYSTALS; SILVER NANOPARTICLES; DIFFERENT SHAPES; PROTEINS; NANOSTRUCTURES; BSA; PVP

Citation

CRYSTAL GROWTH & DESIGN, v.13, no.9, pp.4131 - 4137

ISSN
1528-7483
DOI
10.1021/cg400949x
URI
http://hdl.handle.net/10203/187439
Appears in Collection
CH-Journal Papers(저널논문)
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