scholarly journals Highly selective non-enzymatic electrochemical sensor based on a titanium dioxide nanowire–poly(3-aminophenyl boronic acid)–gold nanoparticle ternary nanocomposite

RSC Advances ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 2138-2147 ◽  
Author(s):  
N. Muthuchamy ◽  
A. Gopalan ◽  
Kwang-Pill Lee
Keyword(s):  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Boronic Acid ◽  
Glucose Sensor ◽  
Ternary Nanocomposite

A highly selective and sensitive enzymeless electrochemical glucose sensor was fabricated based on a novel ternary nanocomposite composed of titanium dioxide nanowire, poly(3-aminophenyl boronic acid) and gold nanoparticles.

A novel gold nanoparticle decorated nanocrystalline zeolite based electrochemical sensor for the nanomolar simultaneous detection of cysteine and glutathione

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95028-95037 ◽  
Author(s):  
Balwinder Kaur ◽  
Rajendra Srivastava ◽  
Biswarup Satpati
Keyword(s):  
Gold Nanoparticles ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Electrocatalytic Activity ◽  
Simultaneous Detection ◽  
Highly Dispersed ◽  
Dispersed Gold

High electrocatalytic activity of the sensor can be attributed to the highly dispersed gold nanoparticles on the nanocrystalline zeolite matrix.

Enhanced electrochemical sensing of dopamine in the presence of AA and UA using a curcumin functionalized gold nanoparticle modified electrode

2019 ◽  
Vol 43 (48) ◽  
pp. 19003-19013 ◽  
Author(s):  
K. Krishna Kumar ◽  
M. Devendiran ◽  
R. A. Kalaivani ◽  
S. Sriman Narayanan
Keyword(s):  
Gold Nanoparticles ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Modified Electrode ◽  
Electrochemical Sensing

In the present study, a electrochemical sensor for the determination of dopamine was developed with green synthesised gold nanoparticles using curcumin as a reducing and, functionalizing agent.

Promising biomass-derived activated carbon and gold nanoparticle nanocomposites as a novel electrode material for electrochemical detection of rutin

RSC Advances ◽  
2016 ◽  
Vol 6 (93) ◽  
pp. 90446-90454 ◽  
Author(s):  
Pengfei Pang ◽  
Fuqing Yan ◽  
Meng Chen ◽  
Haiyan Li ◽  
Yanli Zhang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Activated Carbon ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Electrochemical Detection ◽  
Glassy Carbon ◽  
Electrode Material ◽  
Carbon Electrode ◽  
Peanut Shell ◽  
Modified Glassy Carbon Electrode

A novel electrochemical sensor for rutin was developed based on peanut shell-derived activated carbon and gold nanoparticles composite modified glassy carbon electrode.

Highly sensitive electrochemical sensor for dopamine with a double-stranded deoxyribonucleic acid/gold nanoparticle/graphene modified electrode

2015 ◽  
Vol 7 (5) ◽  
pp. 1878-1883 ◽  
Author(s):  
Wencheng Wang ◽  
Yong Cheng ◽  
Lijun Yan ◽  
Huanhuan Zhu ◽  
Guangjiu Li ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Liquid ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Modified Electrode ◽  
Deoxyribonucleic Acid ◽  
Carbon Ionic Liquid Electrode ◽  
Liquid Electrode ◽  
Highly Sensitive

A highly sensitive electrochemical sensor for the detection of dopamine was realized with a double-stranded deoxyribonucleic acid/gold nanoparticles/graphene modified carbon ionic liquid electrode.

Selective analysis of epinephrine in the presence of uric acid by using an amplified electrochemical sensor employing a gold nanoparticle decorated cysteic acid film

2017 ◽  
Vol 9 (45) ◽  
pp. 6394-6402 ◽  
Author(s):  
G. Karim-Nezhad ◽  
Z. Khorablou
Keyword(s):  
Gold Nanoparticles ◽  
Uric Acid ◽  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Glassy Carbon ◽  
Cysteic Acid ◽  
Carbon Electrode ◽  
Selective Determination ◽  
Selective Analysis

In the present work, an effective electrochemical sensor for the rapid and selective determination of epinephrine (EP) in the presence of uric acid (UA) based on a glassy carbon electrode (GCE) modified with gold nanoparticles (AuNPs) and cysteic acid was applied.

Gold nanoparticle-mediated signal amplification of liquid crystal biosensors for dopamine

The Analyst ◽  
2019 ◽  
Vol 144 (4) ◽  
pp. 1110-1114 ◽  
Author(s):  
Rajib Nandi ◽  
Lisha Loitongbam ◽  
Joydip De ◽  
Varsha Jain ◽  
Santanu Kumar Pal
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystal ◽  
Gold Nanoparticle ◽  
Boronic Acid ◽  
Signal Amplification ◽  
Crystal Interface

A new design was developed for detection of dopamine using a boronic acid based amphiphile at aqueous–liquid crystal interface. The detection was highly enhanced in presence of gold nanoparticles.

Interference of Gold Nanoparticles with In vitro Endotoxin Detection Assays

2020 ◽  
Vol 16 (2) ◽  
pp. 204-213 ◽  
Author(s):  
Melissa A. Vetten ◽  
Mary Gulumian
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Surface Reactivity ◽  
In Vitro Assays ◽  
Limulus Amebocyte Lysate ◽  
Chromogenic Assay ◽  
Nanoparticle Suspensions ◽  
Endotoxin Contamination ◽  
Factor C

Background: Endotoxin-free engineered nanoparticle suspensions are imperative for their successful applications in the field of nanomedicine as well as in the investigations in their toxicity. Gold nanoparticles are known to interfere with various in vitro assays due to their optical properties and potential for surface reactivity. In vitro endotoxin testing assays are known to be susceptible to interference caused by the sample being tested. Objective: This study aimed to identify a preferred assay for the testing of endotoxin contamination in gold nanoparticle suspensions. Methods: The interference by gold nanoparticles on three assays namely, the commonly used limulus amebocyte lysate chromogenic assay, the limulus amebocyte lysate gel-clot method, and the less common recombinant Factor C (rFC) assay, was tested. Results: Possible interference could be observed with all three assays. The interference with the absorbance- based chromogenic assay could not be overcome by dilution; whilst the qualitative nature of the gel-clot assay excluded the possibility of distinguishing between a false positive result due to enhancement of the sensitivity of the assay, and genuine endotoxin contamination. However, interference with the rFC assay was easily overcome through dilution. Conclusion: The rFC assay is recommended as an option for endotoxin contamination detection in gold nanoparticle suspensions.

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...

Fluorescence biosensor for Salmonella typhimurium detection in food based on nano-self-assembly of alendronic acid modified upconversion and gold nanoparticles

2021 ◽  
Author(s):  
Min Chen ◽  
Leiqing Pan ◽  
K. Tu
Keyword(s):  
Gold Nanoparticles ◽  
Salmonella Typhimurium ◽  
Gold Nanoparticle ◽  
Alendronic Acid ◽  
Self Assembly ◽  
Upconversion Nanoparticles ◽  
Fluorescent Biosensor ◽  
Fluorescence Biosensor

A simple and quick responsive fluorescent biosensor for Salmonella typhimurium detection based on the recognition of aptamer coupled with alendronic acid (ADA)@upconversion nanoparticles (UCNPs) and gold nanoparticle (AuNPs) has been...

scholarly journals Enhanced Extracellular Synthesis of Gold Nanoparticles by Soluble Extracts from Escherichia coli Transformed with Rhizobium tropici Phytochelatin Synthase Gene

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 472
Author(s):  
Qunying Yuan ◽  
Manjula Bomma ◽  
Zhigang Xiao
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Synthesis Method ◽  
Nanoparticle Synthesis ◽  
Morphological Properties ◽  
Phytochelatin Synthase ◽  
Rhizobium Tropici ◽  
Whole Cells ◽  
E Coli ◽  
Recombinant Cells

Phytochelatins, the enzymatic products of phytochelatin synthase, play a principal role in protecting the plants from heavy metal and metalloid toxicity due to their ability to scavenge metal ions. In the present study, we investigated the capacity of soluble intracellular extracts from E. coli cells expressing R. tropici phytochelatin synthase to synthesize gold nanoparticle. We discovered that the reaction mediated by soluble extracts from the recombinant E. coli cells had a higher yield of gold nanoparticles, compared to that from the control cells. The compositional and morphological properties of the gold nanoparticles synthesized by the intracellular extracts from recombinant cells and control cells were similar. In addition, this extracellular nanoparticle synthesis method produced purer gold nanoparticles, avoiding the isolation of nanoparticles from cellular debris when whole cells are used to synthesize nanoparticles. Our results suggested that phytochelatins can improve the efficiency of gold nanoparticle synthesis mediated by bacterial soluble intracellular extracts, and the potential of extracellular nanoparticle synthesis platform for the production of nanoparticles in large quantity and pure form is worth further investigation.

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