Colorimetric Detection of Trace Copper Ions Based on Catalytic Leaching of Silver-Coated Gold Nanoparticles

2011 ◽  
Vol 3 (11) ◽  
pp. 4215-4220 ◽  
Author(s):  
Tingting Lou ◽  
Lingxin Chen ◽  
Zhaopeng Chen ◽  
Yunqing Wang ◽  
Ling Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Copper Ions ◽  
Colorimetric Detection

Simple Colorimetric Detection of Amyloidβ-peptide (1-40) based on Aggregation of Gold Nanoparticles in the Presence of Copper Ions

Small ◽  
2015 ◽  
Vol 11 (18) ◽  
pp. 2144-2149 ◽  
Author(s):  
Yanli Zhou ◽  
Hui Dong ◽  
Lantao Liu ◽  
Maotian Xu
Keyword(s):  
Gold Nanoparticles ◽  
Copper Ions ◽  
Colorimetric Detection

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

2014 ◽  
Vol 61 (12) ◽  
pp. 1371-1376 ◽  
Author(s):  
Le Li ◽  
Zhiqin Yuan ◽  
Xinkai Peng ◽  
Lin Li ◽  
Jiantai He ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Copper Ions ◽  
Colorimetric Detection ◽  
Functionalized Gold Nanoparticles

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

2007 ◽  
Vol 7 (2) ◽  
pp. 712-716 ◽  
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+.

Self-assembly of core-satellite gold nanoparticles for colorimetric detection of copper ions

2013 ◽  
Vol 803 ◽  
pp. 128-134 ◽  
Author(s):  
Ziqing Weng ◽  
Hongbin Wang ◽  
Jitraporn Vongsvivut ◽  
Runqing Li ◽  
Alexey M. Glushenkov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Self Assembly ◽  
Copper Ions ◽  
Colorimetric Detection

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

2007 ◽  
Vol 7 (2) ◽  
pp. 712-716 ◽  
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+.

scholarly journals CRISPR/Cas12a-mediated gold nanoparticle aggregation for colorimetric detection of SARS-CoV-2

2021 ◽  
Author(s):  
Yiren Cao ◽  
Jinjun Wu ◽  
Bo Pang ◽  
Hongquan Zhang ◽  
X. Chris Le
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Colorimetric Detection ◽  
Isothermal Amplification ◽  
Nanoparticle Aggregation ◽  
Cleavage Activity ◽  
Gold Nanoparticle Aggregation

The trans-cleavage activity of the target-activated CRISPR-Cas12a liberated an RNA crosslinker from a molecular transducer, which facilitated assembly of gold nanoparticles. Integration of the molecular transducer with isothermal amplification and...

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