Facile and green synthesis of graphene oxide by electrical exfoliation of pencil graphite and gold nanoparticle for non-enzymatic simultaneous sensing of ascorbic acid, dopamine and uric acid

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63513-63520 ◽  
Author(s):  
Habibulla Imran ◽  
Palinci Nagarajan Manikandan ◽  
Venkataraman Dharuman
Keyword(s):  
Ascorbic Acid ◽  
Ionic Liquid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Green Synthesis ◽  
Gold Nanoparticle ◽  
Phosphate Buffer ◽  
Au Nanoparticles ◽  
First Time ◽  
Simultaneous Sensing

Pencil graphite is electrochemically exfoliated to gain few layered graphene oxide in HCl, NaOH and phosphate buffer saline without ionic liquid for the first time and used for simultaneous sensing of dopamine, ascorbic acid and uric acid in the presence of Au nanoparticles.

Simultaneous determination of dopamine, ascorbic acid and uric acid using a multi-walled carbon nanotube and reduced graphene oxide hybrid functionalized by PAMAM and Au nanoparticles

2015 ◽  
Vol 7 (4) ◽  
pp. 1471-1477 ◽  
Author(s):  
Siyuan Wang ◽  
Wen Zhang ◽  
Xia Zhong ◽  
Yaqin Chai ◽  
Ruo Yuan
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Simultaneous Determination ◽  
Au Nanoparticles ◽  
Electrochemical Determination ◽  
Multi Walled Carbon Nanotube ◽  
Reduced Graphene

A nanohybrid (RGO–PAMAM–MWCNT–AuNPs) for simultaneous electrochemical determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA) was reported in this paper.

Two-Photon Sensing of Dopamine by Using Au Nanoparticles

2015 ◽  
Vol 738-739 ◽  
pp. 31-37
Author(s):  
Cui Feng Jiang ◽  
Neng Yue Gao ◽  
Qi Sheng Wu ◽  
Yu Sun ◽  
Qing Hua Xu
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Detection Limit ◽  
Metal Ions ◽  
Gold Nanoparticle ◽  
Au Nanoparticles ◽  
Cross Linking ◽  
Au Nps ◽  
Two Photon ◽  
Catechol Group

In this paper, we demonstrated a gold nanoparticle based two-photon photoluminescence (TPPL) assay for the detection of dopamine with the detection limit of 0.3 μM. Protonated dopamine molecules can bind bidentately to surface of gold atoms through the catechol group. The adsorption of dopamine displaces the stabilizing agent of citrate groups, and neutralizes the charge of solution, resulting in non-cross linking aggregation of Au NPs. Aggregation of Au NPs could induce significantly enhanced TPPL. Thus, a simple TPPL assay was designed. We have shown that when Au NPs solution was mixed with dopamine, TPPL intensity increased by about 47 times. The mechanism of sensing assay has been discussed. In addition, the TPPL assay was highly selective to dopamine and it can distinguish from uric acid, ascorbic acid and metal ions.

Gold nanoparticle decorated polypyrrole/graphene oxide nanosheets as a modified electrode for simultaneous determination of ascorbic acid, dopamine and uric acid

2020 ◽  
Vol 44 (12) ◽  
pp. 4916-4926 ◽  
Author(s):  
Chaoli Tan ◽  
Jie Zhao ◽  
Peng Sun ◽  
Wei Zheng ◽  
Guofeng Cui
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Simultaneous Determination ◽  
Gold Nanoparticle ◽  
Modified Electrode ◽  
Graphene Oxide Nanosheets

AuNPs, GO and PPy are combined effectively to form a novel composite showing a huge enhancement in electrochemical performance compared to the single materials.

A thin poly(acridine orange) film containing reduced graphene oxide for voltammetric simultaneous sensing of ascorbic acid and uric acid

2014 ◽  
Vol 181 (5-6) ◽  
pp. 589-595 ◽  
Author(s):  
Li Tian ◽  
Boxun Zhang ◽  
Ding Sun ◽  
Ruizhan Chen ◽  
Binbin Wang ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Acridine Orange ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Simultaneous Sensing
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