scholarly journals A Simple and Sensitive Nanogold RRS/Abs Dimode Sensor for Trace As3+ Based on Aptamer Controlled Nitrogen Doped Carbon Dot Catalytic Amplification

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5930
Author(s):  
Hongyan Bai ◽  
Haolin Wang ◽  
Fuzhang Bai ◽  
Aihui Liang ◽  
Zhiliang Jiang
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Nitrogen Doped ◽  
Strong Surface ◽  
Aptamer Sensor ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Using citric acid (CA) and ethylenediamine (EDA) as precursors, stable nitrogen-doped carbon dots (CD) nanosols were prepared by microwave procedure and characterized in detail. It was found that CDNs catalyze ethanol (Et)-HAuCl4 to generate gold nanoparticles (AuNPs), which have strong surface plasmon resonance, Rayleigh scattering, (RRS) and a surface plasmon resonance (SPR) absorption (Abs) effect at 370 nm and 575 nm, respectively. Compled the new catalytic amplification indicator reaction with the specific As3+ aptamer reaction, a new RRS/Abs dual-mode aptamer sensor for the assay of trace As3+ was developed, based on the RRS/Abs signals increasing linearly with As3+ increasing in the ranges of 5–250 nmol/L and 50−250 nmol/L, whose detection limits were 0.8 nmol/L and 3.4 nmol/L As3+, respectively. This analytical method has the advantages of high selectivity, simplicity, and rapidity, and it has been successfully applied to the detection of practical samples.

A simple and sensitive graphene oxide/gold nanoparticle surface plasmon resonance Rayleigh scattering-energy transfer analytical platform for detection of iodide and H2O2

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 9272-9277 ◽  
Author(s):  
Yaohui Wang ◽  
Xinghui Zhang ◽  
Qingye Liu ◽  
Guiqing Wen ◽  
Aihui Liang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Transfer ◽  
Surface Plasmon Resonance ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Nanoparticle Surface

A sensitive graphene oxide/nanogold surface plasmon resonance Rayleigh scattering-energy transfer analytical platform was developed for detection of iodide and H2O2.

An in situ SERS study of plasmonic nanochemistry based on bifunctional “hedgehog-like” arrays

Nanoscale ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 9422-9428 ◽  
Author(s):  
Yuduo Guan ◽  
Zengyao Wang ◽  
Panpan Gu ◽  
Yu Wang ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Strong Surface

An in situ SERS study of plasmonic nanochemistry is realized on hierarchical Ag “hedgehog-like” arrays with strong surface plasmon resonance.

Fabrication and Visible Response of Au-TiO2 (P25) Composite Photocatalyst with Obvious Surface Plasmon Resonance Effect

2012 ◽  
Vol 465 ◽  
pp. 215-219
Author(s):  
Ying Liu ◽  
Hong Tao Yu ◽  
Xie Quan
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Resonance Effect ◽  
Phenol Degradation ◽  
Composite Photocatalyst ◽  
Characteristic Absorption Peak ◽  
Strong Surface ◽  
Degussa P25 ◽  
20 Nm

Au-TiO2 composite photocatalysis material was fabricated by the photodeposition method. The SEM and TEM images demonstrate that Au-TiO2 NPs are with inerratic geometry and their diameters are in the range of 10 nm to 20 nm. The UV-vis spectra shows the strong peaks in 200-400 nm and near 550 nm which are attributed to the characteristic absorption peak of TiO2 and the strong surface-plasmon-resonance of Au NPs, respectively. Under visible light irradiation, the phenol degradation dynamics constant on Au-TiO2 was 0.008 min-1 which was 4 times of that on Degussa P25. The effects of Au amount on the photocatalytic capability of Au-TiO2 were also investigated.

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