Synthesis of gold nanocubes in aqueous solution with remarkable shape-selectivity

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Adelaide Miranda (Author) Other; Eliana Malheiro (Author) Other; Peter Eaton (Author) Other; Patricia A Carvalho (Author) Other; Baltazar de Castro (Author) FCUP; Eulalia Pereira (Author) FCUP

Journal

Title: Journal of Porphyrins and Phthalocyanines

Vol. 15

Pages: 441-448

ISSN: 1088-4246

Publisher: World Scientific

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 6 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-002-RNS

DOI: 10.1142/s1088424611003367

Abstract (EN): This paper reports a facile method to prepare gold nanocubes with an average size length of 13 +/- 2 nm, a shape selectivity >90%, and a very good reproducibility. The gold nanocubes were prepared by photocatalytic reduction of Au(III) using a cationic, water soluble porphyrin as the photocatalyst, and cetyltrimethylammonium bromide as the capping agent. The synthesis is performed in water, at pH 7, and room temperature. The nanocubes were characterized by transmission electron microscopy, scanning electron microscopy, atomic force microscopy, and X-ray phototelectron spectroscopy. Shape selectivity for the synthesis of nanocubes is due to a different rate of growth of the (100) and (111) facets of the nanoparticles, and such control in this synthesis is achieved by careful selection of the initial gold precursor for the photocatalytic cycle.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8