Edge gold-coated silver nanoprism [Ag@(Au nanoframe)] for H202 detection

Mohammad M. Shahjamali; Erik Martinsson; Winston Marcello; Lisha Yin; Bo Liedberg; Freddy Boey; Can Xue

doi:10.1117/12.923550

30 January 2012 Edge gold-coated silver nanoprism [Ag@(Au nanoframe)] for H₂0₂ detection

Mohammad M. Shahjamali, Erik Martinsson, Winston Marcello, Lisha Yin, Bo Liedberg, Freddy Boey, Can Xue

Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 83511S (2012) https://doi.org/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.

Citation Download Citation

Mohammad M. Shahjamali, Erik Martinsson, Winston Marcello, Lisha Yin, Bo Liedberg, Freddy Boey, and Can Xue "Edge gold-coated silver nanoprism [Ag@(Au nanoframe)] for H₂0₂ detection", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83511S (30 January 2012); https://doi.org/10.1117/12.923550

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