Highly Selective Colorimetric Detection of Copper Ions Using Cysteamine Functionalized Gold Nanoparticles

This communication reports an efficient visual detection method of Cu2+ by L-cysteine functionalized gold nanoparticles in aqueous solution. Upon exposure to Cu2+, the gold nanoparticle solution changed from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. This colorimetric sensor allows a rapid quantitative assay of Cu2+ down to the concentration range of 10−5 M. Recognition of Cu2+ and formation of the aggregates are proposed to occur via a 2 : 1 sandwich complex between L-cysteine and Cu2+.

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Fast Colorimetric Detection of Copper Ions Using L-Cysteine Functionalized Gold Nanoparticles

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.18053 ◽

2007 ◽

Vol 7 (2) ◽

pp. 712-716 ◽

Cited By ~ 3

Author(s):

Wenrong Yang ◽

J. Justin Gooding ◽

Zhicong He ◽

Qiong Li ◽

Guonan Chen

Keyword(s):

Aqueous Solution ◽

Gold Nanoparticles ◽

Gold Nanoparticle ◽

Surface Plasmon ◽

Visual Detection ◽

Detection Method ◽

Copper Ions ◽

Colorimetric Detection ◽

Sandwich Complex ◽

Functionalized Gold Nanoparticles

This communication reports an efficient visual detection method of Cu2+ by L-cysteine functionalized gold nanoparticles in aqueous solution. Upon exposure to Cu2+, the gold nanoparticle solution changed from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. This colorimetric sensor allows a rapid quantitative assay of Cu2+ down to the concentration range of 10−5 M. Recognition of Cu2+ and formation of the aggregates are proposed to occur via a 2 : 1 sandwich complex between L-cysteine and Cu2+.

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Selective and sensitive colorimetric detection of copper ions based on anti-aggregation of the glutathione-induced aggregated gold nanoparticles and its application for determining sulfide anions

RSC Advances ◽

10.1039/c3ra42909a ◽

2013 ◽

Vol 3 (44) ◽

pp. 21424 ◽

Cited By ~ 13

Author(s):

Qian Gao ◽

Yin Zheng ◽

Chi Song ◽

Li-Qiang Lu ◽

Xi-Ke Tian ◽

...

Keyword(s):

Gold Nanoparticles ◽

Copper Ions ◽

Colorimetric Detection

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Biosensors: Adamantane Derivatives Functionalized Gold Nanoparticles for Colorimetric Detection of MiRNA (Part. Part. Syst. Charact. 6/2017)

Particle & Particle Systems Characterization ◽

10.1002/ppsc.201770019 ◽

2017 ◽

Vol 34 (6) ◽

Author(s):

Peng Miao ◽

Yuguo Tang ◽

Zhiqing Mao ◽

Yuanzhong Liu

Keyword(s):

Gold Nanoparticles ◽

Colorimetric Detection ◽

Adamantane Derivatives ◽

Functionalized Gold Nanoparticles

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Colorimetric detection of influenza A virus using antibody-functionalized gold nanoparticles

The Analyst ◽

10.1039/c5an00407a ◽

2015 ◽

Vol 140 (12) ◽

pp. 3989-3995 ◽

Cited By ~ 57

Author(s):

Yuanjian Liu ◽

Linqun Zhang ◽

Wei Wei ◽

Hongyu Zhao ◽

Zhenxian Zhou ◽

...

Keyword(s):

Gold Nanoparticles ◽

Influenza A Virus ◽

Clinical Diagnosis ◽

Specific Antibody ◽

Influenza A ◽

Colorimetric Detection ◽

Viral Pathogen ◽

Virus Surface ◽

Functionalized Gold Nanoparticles

A colorimetric immunosensor for IAV based on AuNPs modified with mAb is developed. This assay depends on an ordered AuNPs structure covering the virus surface and can be applied to any viral pathogen by incorporating the appropriate pathogen-specific antibody, giving the proposed method a broad prospect in clinical diagnosis applications.

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