Dissolving Ag from Au-Ag alloy nanoboxes with H2O2: A method for both tailoring the optical properties and measuring the H 2O2 concentration

Qiang Zhang; Claire M. Cobley; Jie Zeng; Long Ping Wen; Jingyi Chen; Younan Xia

doi:10.1021/jp100354z

Dissolving Ag from Au-Ag alloy nanoboxes with H₂O₂: A method for both tailoring the optical properties and measuring the H ₂O₂ concentration

Qiang Zhang
, Claire M. Cobley
, Jie Zeng
, Long Ping Wen
, Jingyi Chen^*
, Younan Xia

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

136 Scopus citations

Abstract

This article describes a method for generating Au-based nanocages with controlled wall thickness, porosity, and optical properties by dissolving Ag from Au-Ag alloy nanoboxes with H₂O₂. It involves two steps: (i) formation of Au-Ag alloy nanoboxes with some pure Ag left behind by titrating Ag nanocubes with aqueous HAuCl₄ and (ii) removal of Ag atoms from both the pure Ag remaining in the nanoboxes and the alloy walls via H₂O₂ etching. The optical properties of the resulting Au-Ag nanocages can be easily tailored by controlling the amount of H ₂O₂ added into the reaction system. Due to the changes to the optical spectra, the Au-Ag alloy nanoboxes can also be employed to detect H₂O₂ with a linear readout (R² = 0.99) in the range of concentration from 5 × 10^-2 M down to 5 × 10^-7 M.

Original language	English
Pages (from-to)	6396-6400
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	14
DOIs	https://doi.org/10.1021/jp100354z
State	Published - 15 Apr 2010
Externally published	Yes

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title = "Dissolving Ag from Au-Ag alloy nanoboxes with H2O2: A method for both tailoring the optical properties and measuring the H 2O2 concentration",

abstract = "This article describes a method for generating Au-based nanocages with controlled wall thickness, porosity, and optical properties by dissolving Ag from Au-Ag alloy nanoboxes with H2O2. It involves two steps: (i) formation of Au-Ag alloy nanoboxes with some pure Ag left behind by titrating Ag nanocubes with aqueous HAuCl4 and (ii) removal of Ag atoms from both the pure Ag remaining in the nanoboxes and the alloy walls via H2O2 etching. The optical properties of the resulting Au-Ag nanocages can be easily tailored by controlling the amount of H 2O2 added into the reaction system. Due to the changes to the optical spectra, the Au-Ag alloy nanoboxes can also be employed to detect H2O2 with a linear readout (R2 = 0.99) in the range of concentration from 5 × 10-2 M down to 5 × 10-7 M.",

author = "Qiang Zhang and Cobley, \{Claire M.\} and Jie Zeng and Wen, \{Long Ping\} and Jingyi Chen and Younan Xia",

year = "2010",

month = apr,

day = "15",

doi = "10.1021/jp100354z",

language = "英语",

volume = "114",

pages = "6396--6400",

journal = "Journal of Physical Chemistry C",

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T1 - Dissolving Ag from Au-Ag alloy nanoboxes with H2O2

T2 - A method for both tailoring the optical properties and measuring the H 2O2 concentration

AU - Zhang, Qiang

AU - Cobley, Claire M.

AU - Zeng, Jie

AU - Wen, Long Ping

AU - Chen, Jingyi

AU - Xia, Younan

PY - 2010/4/15

Y1 - 2010/4/15

N2 - This article describes a method for generating Au-based nanocages with controlled wall thickness, porosity, and optical properties by dissolving Ag from Au-Ag alloy nanoboxes with H2O2. It involves two steps: (i) formation of Au-Ag alloy nanoboxes with some pure Ag left behind by titrating Ag nanocubes with aqueous HAuCl4 and (ii) removal of Ag atoms from both the pure Ag remaining in the nanoboxes and the alloy walls via H2O2 etching. The optical properties of the resulting Au-Ag nanocages can be easily tailored by controlling the amount of H 2O2 added into the reaction system. Due to the changes to the optical spectra, the Au-Ag alloy nanoboxes can also be employed to detect H2O2 with a linear readout (R2 = 0.99) in the range of concentration from 5 × 10-2 M down to 5 × 10-7 M.

AB - This article describes a method for generating Au-based nanocages with controlled wall thickness, porosity, and optical properties by dissolving Ag from Au-Ag alloy nanoboxes with H2O2. It involves two steps: (i) formation of Au-Ag alloy nanoboxes with some pure Ag left behind by titrating Ag nanocubes with aqueous HAuCl4 and (ii) removal of Ag atoms from both the pure Ag remaining in the nanoboxes and the alloy walls via H2O2 etching. The optical properties of the resulting Au-Ag nanocages can be easily tailored by controlling the amount of H 2O2 added into the reaction system. Due to the changes to the optical spectra, the Au-Ag alloy nanoboxes can also be employed to detect H2O2 with a linear readout (R2 = 0.99) in the range of concentration from 5 × 10-2 M down to 5 × 10-7 M.

UR - https://www.scopus.com/pages/publications/77951067247

U2 - 10.1021/jp100354z

DO - 10.1021/jp100354z

M3 - 文章

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SN - 1932-7447

VL - 114

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EP - 6400

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 14

ER -

Dissolving Ag from Au-Ag alloy nanoboxes with H₂O₂: A method for both tailoring the optical properties and measuring the H ₂O₂ concentration

Abstract

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