Enhancement of the selectivity to dihydroxyacetone in glycerol oxidation using gold nanoparticles supported on carbon nanotubes

2011 ◽  
Vol 16 (1) ◽  
pp. 64-69 ◽  
Author(s):  
Elodie G. Rodrigues ◽  
Manuel F.R. Pereira ◽  
Juan J. Delgado ◽  
Xiaowei Chen ◽  
José J.M. Órfão
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Glycerol Oxidation

Molecularly Imprinted Sensor for Ascorbic Acid Based on Gold Nanoparticles and Multiwalled Carbon Nanotubes

2020 ◽  
Vol 16 (7) ◽  
pp. 905-913
Author(s):  
Youyuan Peng ◽  
Qingshan Miao
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Multiwalled Carbon Nanotubes ◽  
Ph Value ◽  
Biological Fluids ◽  
Water Soluble ◽  
Multiwalled Carbon ◽  
Experimental Conditions ◽  
Molecularly Imprinted

Background: L-Ascorbic acid (AA) is a kind of water soluble vitamin, which is mainly present in fruits, vegetables and biological fluids. As a low cost antioxidant and effective scavenger of free radicals, AA may help to prevent diseases such as cancer and Parkinson’s disease. Owing to its role in the biological metabolism, AA has also been utilized for the therapy of mental illness, common cold and for improving the immunity. Therefore, it is very necessary and urgent to develop a simple, rapid and selective strategy for the detection of AA in various samples. Methods: The molecularly imprinted poly(o-phenylenediamine) (PoPD) film was prepared for the analysis of L-ascorbic acid (AA) on gold nanoparticles (AuNPs) - multiwalled carbon nanotubes (MWCNTs) modified glass carbon electrode (GCE) by electropolymerization of o-phenylenediamine (oPD) and AA. Experimental parameters including pH value of running buffer and scan rates were optimized. Scanning electron microscope (SEM), fourier-transform infrared (FTIR) spectra, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were utilized for the characterization of the imprinted polymer film. Results: Under the selected experimental conditions, the DPV peak currents of AA exhibit two distinct linear responses ranging from 0.01 to 2 μmol L-1 and 2 to 100 μmol L-1 towards the concentrations of AA, and the detection limit was 2 nmol L-1 (S/N=3). Conclusion: The proposed electrochemical sensor possesses excellent selectivity for AA, along with good reproducibility and stability. The results obtained from the analysis of AA in real samples demonstrated the applicability of the proposed sensor to practical analysis.

Doping and plasmonic Raman enhancement in hybrid single walled carbon nanotubes films with embedded gold nanoparticles

Carbon ◽  
2021 ◽  
Vol 179 ◽  
pp. 531-540
Author(s):  
Anna Wroblewska ◽  
Georgy Gordeev ◽  
Anna Duzynska ◽  
Stephanie Reich ◽  
Mariusz Zdrojek
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Raman Enhancement ◽  
Walled Carbon Nanotubes

In-situ growth of ZIF-8 on gold nanoparticles/magnetic carbon nanotubes for electrochemical detection of bisphenol A

2021 ◽  
Author(s):  
Hexiang Li ◽  
Fawei Zhu ◽  
Jun Xiang ◽  
Fangbin Wang ◽  
Qi Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Bisphenol A ◽  
Electrochemical Detection ◽  
Metal Organic Frameworks ◽  
In Situ Growth ◽  
Metal Organic ◽  
Magnetic Carbon ◽  
Magnetic Carbon Nanotubes

We herein report a facile and scalable strategy for fabrication of the metal organic frameworks (MOFs) based composite by in-situ growing ZIF-8 on the gold nanoparticles (AuNPs) loaded magnetic carbon...

Easy synthesis of a nanostructured hybrid array consisting of gold nanoparticles and carbon nanotubes

Carbon ◽  
2009 ◽  
Vol 47 (12) ◽  
pp. 2924-2932 ◽  
Author(s):  
Sook Young Moon ◽  
Takafumi Kusunose ◽  
Shun-ichiro Tanaka ◽  
Tohru Sekino
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles

Application of nanomaterials in microbial-cell biosensor constructions

2015 ◽  
Vol 69 (1) ◽  
Author(s):  
Jana Šefčovičová ◽  
Jan Tkac
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Rapid Detection ◽  
Food Industry ◽  
Low Cost ◽  
Microbial Cell ◽  
Direct Connection ◽  
Qualitative Detection ◽  
Analytical Tools ◽  
Cell Biosensor

AbstractMicrobial cell biosensors, where cells are in direct connection with a transducer enabling quantitative and qualitative detection of an analyte, are very promising analytical tools applied mainly for assays in the environmental field, food industry or biomedicine. Microbial cell biosensors are an excellent alternative to conventional analytical methods due to their specificity, rapid detection and low cost of analysis. Nowadays, nanomaterials are often used in the construction of biosensors to improve their sensitivity and stability. In this review, the combination of microbial and other individual cells with different nanomaterials (carbon nanotubes, graphene, gold nanoparticles, etc.) for the construction of biosensors is described and their applications are provided as well.

In situassembly of gold nanoparticles on nitrogen-doped carbon nanotubes for sensitive immunosensing of microcystin-LR

2011 ◽  
Vol 47 (2) ◽  
pp. 668-670 ◽  
Author(s):  
Jing Zhang ◽  
Jianping Lei ◽  
Rong Pan ◽  
Chuan Leng ◽  
Zheng Hu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon
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