31 January 2012 Edge gold-coated silver nanoprism [Ag@(Au nanoframe)] for H202 detection
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Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 83511S (2012); doi: 10.1117/12.923550
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia
Abstract
In this paper we describe a facile method for synthesizing gold triangular nanoframe from edge gold-coated silver nanoprism [Ag@(Au nanoframe)] with controlled ridge thickness and interior hollow diameter via chemical etching of silver from the gold coated Ag nanoprism with Hydrogen peroxide. Our process involves two major steps: (1) Formation of Ag@(Au nanoframe) by deposition of gold on the edges of Ag nanoprisms in room temperature (2) Etching of Ag atoms from the gold fame via H2O2 oxidation. The optical properties of the resulting nanoframe can be easily tailored in a broad range by controlling the ridge thickness or hole diameter by amount of H2O2 added into the reaction. Due to the changes to the optical spectra during etching, the nanoframe formation can be employed to detect H2O2 in a broad range of concentration down to 1 μM.
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Mohammad M. Shahjamali, Erik Martinsson, Winston Marcello, Lisha Yin, Bo Liedberg, Freddy Boey, Can Xue, "Edge gold-coated silver nanoprism [Ag@(Au nanoframe)] for H202 detection", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83511S (31 January 2012); doi: 10.1117/12.923550; https://doi.org/10.1117/12.923550
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KEYWORDS
Silver

Gold

Transmission electron microscopy

Etching

Nanostructures

Chemical species

Nanoparticles

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