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

scholarly journals Highly sensitive and selective visual detection of Cr(VI) ions based on etching of silver-coated gold nanorods

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Dasom Kim ◽  
Eunjin Choi ◽  
Chaedong Lee ◽  
Yejung Choi ◽  
Hoonsub Kim ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Gold Nanorods ◽  
Localized Surface Plasmon Resonance ◽  
Growth Process ◽  
High Selectivity ◽  
Visual Detection ◽  
Visible Spectrum ◽  
Localized Surface Plasmon ◽  
Detection Range ◽  
Highly Sensitive

Abstract We report a visual detection of Cr(VI) ions using silver-coated gold nanorods (AuNR@Ag) as sensing probes. Au NRs were prepared by a seed-mediated growth process and AuNR@Ag nanostructures were synthesized by growing Ag nanoshells on Au NRs. Successful coating of Ag nanoshells on the surface of Au NRs was demonstrated with TEM, EDS, and UV–vis spectrometer. By increasing the overall amount of the deposited Ag on Au NRs, the localized surface plasmon resonance (LSPR) band was significantly blue-shifted, which allowed tuning across the visible spectrum. The sensing mechanism relies on the redox reaction between Cr(VI) ions and Ag nanoshells on Au NRs. As the concentration of Cr(VI) ions increased, more significant red-shift of the longitudinal peak and intensity decrease of the transverse peak could be observed using UV–vis spectrometer. Several parameters such as concentration of CTAB, thickness of the Ag nanoshells and pH of the sample were carefully optimized to determine Cr(VI) ions. Under optimized condition, this method showed a low detection limit of 0.4 μM and high selectivity towards Cr(VI) over other metal ions, and the detection range of Cr(VI) was tuned by controlling thickness of the Ag nanoshells. From multiple evaluations in real sample, it is clear that this method is a promising Cr(VI) ion colorimetric sensor with rapid, sensitive, and selective sensing ability.

scholarly journals Anchoring zinc-doped carbon dots on a paper-based chip for highly sensitive fluorescence detection of copper ions

The Analyst ◽  
2021 ◽  
Vol 146 (20) ◽  
pp. 6297-6305
Author(s):  
Qinglan Miao ◽  
Ji Qi ◽  
Yuanyuan Li ◽  
Xinxia Fan ◽  
Dongmei Deng ◽  
...  
Keyword(s):  
Fluorescence Detection ◽  
Carbon Dots ◽  
Active Sites ◽  
Copper Ions ◽  
Fluorescent Detection ◽  
Zn Doping ◽  
Highly Sensitive ◽  
Doped Carbon Dots

A novel paper-based chip that anchored zinc-doped carbon dots was constructed for sensitive and stable fluorescent detection of Cu2+. Zn doping increased the active sites for simplifying the modification of carbon dots.

Plasmonic circular dichroism in side-by-side oligomers of gold nanorods: the influence of chiral molecule location and interparticle distance

2015 ◽  
Vol 17 (12) ◽  
pp. 8187-8193 ◽  
Author(s):  
Shuai Hou ◽  
Hui Zhang ◽  
Jiao Yan ◽  
Yinglu Ji ◽  
Tao Wen ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Gold Nanorods ◽  
Interparticle Distance ◽  
Chiral Molecule ◽  
Highly Sensitive ◽  
Circular Dichroïsm

The CD signal of Au nanorod assemblies is highly sensitive to the chiral molecule location and the interparticle distance.

Selection of an aptamer against Muscovy duck parvovirus for highly sensitive rapid visual detection by label-free aptasensor

Talanta ◽  
2018 ◽  
Vol 176 ◽  
pp. 214-220 ◽  
Author(s):  
Taofeng Lu ◽  
Qin Ma ◽  
Wenzhuo Yan ◽  
Yuanzhi Wang ◽  
Yuanyuan Zhang ◽  
...  
Keyword(s):  
Visual Detection ◽  
Muscovy Duck ◽  
Label Free ◽  
Highly Sensitive ◽  
Muscovy Duck Parvovirus ◽  
Selection Of

Selection of a DNA Aptamer against Zearalenone and Docking Analysis for Highly Sensitive Rapid Visual Detection with Label-Free Aptasensor

2018 ◽  
Vol 66 (45) ◽  
pp. 12102-12110 ◽  
Author(s):  
Yuanyuan Zhang ◽  
Taofeng Lu ◽  
Yue Wang ◽  
Chenxi Diao ◽  
Yan Zhou ◽  
...  
Keyword(s):  
Visual Detection ◽  
Dna Aptamer ◽  
Label Free ◽  
Docking Analysis ◽  
Highly Sensitive ◽  
Selection Of

An electrochemical sensor for highly sensitive detection of copper ions based on a new molecular probe Pi-A decorated on graphene

2017 ◽  
Vol 9 (4) ◽  
pp. 618-624 ◽  
Author(s):  
Liuqing Yang ◽  
Na Huang ◽  
Liyan Huang ◽  
Meiling Liu ◽  
Haitao Li ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Electrochemical Method ◽  
Copper Ions ◽  
Molecular Probe ◽  
Selective Detection ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

In this paper, a new electrochemical sensor based on a new fluorescent probe N-(2-(1-(p-tolyl)-1H-phenanthro[9,10-d]imidazol-2-yl)phenyl)picolinamide (Pi-A) decorated reduced graphene oxide (RGO) modified glassy carbon electrode (GCE) was developed for highly selective detection of copper ions using the electrochemical method.

Highly sensitive visual detection of mutant DNA based on polymeric nanoparticles-participating amplification

RSC Advances ◽  
2016 ◽  
Vol 6 (116) ◽  
pp. 115238-115246 ◽  
Author(s):  
Yanjun Cui ◽  
Dequan Zhuang ◽  
Tianwei Tan ◽  
Jing Yang
Keyword(s):  
Surface Area ◽  
Visual Detection ◽  
Polymeric Nanoparticles ◽  
Large Surface Area ◽  
Highly Sensitive ◽  
Amplification System

Taking advantage of the nanoparticles' large surface area and structural repeating characteristics, polymeric nanoparticles-participating polymerization-based amplification system was designed to enhance the sensitivity of detection.

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