Highly sensitive and visual detection of guanosine 3′-diphosphate-5′-di(tri)phosphate (ppGpp) in bacteria based on copper ions-mediated 4-mercaptobenzoic acid modified gold nanoparticles

2018 ◽  
Vol 1023 ◽  
pp. 89-95 ◽  
Author(s):  
Jia Chen ◽  
Yanni Huang ◽  
Xiaoyan Yang ◽  
Haijuan Zhang ◽  
Zhan Li ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Visual Detection ◽  
Copper Ions ◽  
Highly Sensitive

Gold nanoparticles for highly sensitive and selective copper ions sensing—old materials with new tricks

2011 ◽  
Vol 21 (22) ◽  
pp. 7898 ◽  
Author(s):  
Yi-Min Fang ◽  
Jing Song ◽  
Jin-Shui Chen ◽  
Song-Bo Li ◽  
Le Zhang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Copper Ions ◽  
Highly Sensitive

Highly sensitive and rapid visual detection of ricin using unmodified gold nanoparticle probes

RSC Advances ◽  
2014 ◽  
Vol 4 (83) ◽  
pp. 43998-44003 ◽  
Author(s):  
Jingting Hu ◽  
Haichao Dai ◽  
Yujing Sun ◽  
Pengjuan Ni ◽  
Yilin Wang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Visual Detection ◽  
Nanoparticle Probes ◽  
Highly Sensitive

A sensitive aptamer-based colorimetric biosensor for the detection of ricin using unmodified gold nanoparticles as probe was developed.

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 Highly Sensitive Visual Detection of Copper Ions Based on the Shape-Dependent LSPR Spectroscopy of Gold Nanorods

Langmuir ◽  
2014 ◽  
Vol 30 (12) ◽  
pp. 3625-3630 ◽  
Author(s):  
Zhiyang Zhang ◽  
Zhaopeng Chen ◽  
Chengli Qu ◽  
Lingxin Chen
Keyword(s):  
Gold Nanorods ◽  
Visual Detection ◽  
Copper Ions ◽  
Highly Sensitive

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 Highly sensitive colorimetric sensing of copper(ii) ions based on “CLICK-17” DNAzyme-catalyzed azide modified gold nanoparticles and alkyne capped dsDNA cycloaddition

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24196-24205
Author(s):  
Weicong Yan ◽  
Zhensheng Zhong ◽  
Jie Ma ◽  
Thitima Rujiralai
Keyword(s):  
Gold Nanoparticles ◽  
Visual Detection ◽  
Click Reaction ◽  
Colorimetric Sensing ◽  
Highly Sensitive

We report selective and visual detection of Cu2+ based on aggregation of azide modified gold nanoparticles induced by CLICK-17 DNAzyme and Cu2+ or Cu+ catalyzed click reaction between azide-AuNPs and alkyne-dsDNA.

Synthesis and application of polycation-stabilized gold nanoparticles as a highly sensitive sensor for molecular cysteine determination

2021 ◽  
pp. 106481
Author(s):  
Quang Khanh Nguyen ◽  
Thi Hieu Hoang ◽  
Xuan Thanh Bui ◽  
Thi Anh Huong Nguyen ◽  
Tien Duc Pham ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Highly Sensitive ◽  
Sensitive Sensor
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