One-Pot, High-Yield Synthesis of Convex Au Octahedra by H2O2 - Mediated Process In Solution Phase

Cuong Cao, Sang Jun Sim

Research output: Contribution to conferencePosterpeer-review

Abstract

A simple, non-seeding and high-yield synthesis of convex gold octahedra with size of ca. 50 nm in aqueous solution is described. The octahedral nanoparticles were systematically prepared by reduction of HAuCl4 using ascorbic acid (AA) in the presence of cetyltrimethylammonium bromide (CTAB) as the stabilizing surfactant while concentrations of Au3+ were fixed. The synthesizing process is especially different to other wet synthesis of metallic nanoparticles because it is mediated by H2O2. Mechanism of the H2O2 – mediated process will be described in details. The gold octahedra were shown to be single crystals with all 8 faces belonging to {111} family. Moreover, the single crystalline particles also showed attractive optical properties towards LSPR that should find uses as labels for microscopic imaging, materials for colorimetric biosensings, or nanosensor developments.
Original languageEnglish
Publication statusPublished - 2007
EventNanobio-Europe: International Congress & Exhibition on Nanotechnology - Munster , Germany
Duration: 13 Jun 200715 Jun 2007

Conference

ConferenceNanobio-Europe: International Congress & Exhibition on Nanotechnology
CountryGermany
CityMunster
Period13/06/200715/06/2007

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