A novel electrochemical biosensor for the determination of dopamine and ascorbic acid based on graphene oxide /poly(aniline-co-thionine) nanocomposite

2020 ◽  
Vol 873 ◽  
pp. 114352 ◽  
Author(s):  
Nan-nan Song ◽  
Yin-zhu Wang ◽  
Xue-yun Yang ◽  
Hui-long Zong ◽  
Ya-xian Chen ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Electrochemical Biosensor ◽  
Poly Aniline

Fabrication of a silver nanowire-reduced graphene oxide-based electrochemical biosensor and its enhanced sensitivity in the simultaneous determination of ascorbic acid, dopamine, and uric acid

2015 ◽  
Vol 3 (36) ◽  
pp. 9444-9453 ◽  
Author(s):  
Shin-Ming Li ◽  
Yu-Sheng Wang ◽  
Sheng-Tsung Hsiao ◽  
Wei-Hao Liao ◽  
Chi-Wen Lin ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrochemical Biosensor ◽  
Silver Nanowire ◽  
Step Process ◽  
Enhanced Sensitivity ◽  
Reduced Graphene

Silver nanowire/reduced graphene oxide nanocomposites (AgNW/rGO) are synthesized using a two-step process.

scholarly journals A highly sensitive biosensor based on methacrylated graphene oxide-grafted polyaniline for ascorbic acid determination

2020 ◽  
Vol 9 (1) ◽  
pp. 760-767 ◽  
Author(s):  
Seyed Morteza Naghib ◽  
Farahnaz Behzad ◽  
Mehdi Rahmanian ◽  
Yasser Zare ◽  
Kyong Yop Rhee
Keyword(s):  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Current Response ◽  
Functionalized Graphene ◽  
Serum Samples ◽  
Promising Candidate ◽  
Graphene Nanocomposites ◽  
Selective Determination ◽  
Highly Sensitive

AbstractFunctionalized graphene-based nanocomposites have opened new windows to address some challenges for increasing the sensitivity, accuracy and functionality of biosensors. Polyaniline (PANI) is one of the most potentially promising and technologically important conducting polymers, which brings together the electrical features of metals with intriguing properties of plastics including facile processing and controllable chemical and physical properties. PANI/graphene nanocomposites have attracted intense interest in various fields due to unique physicochemical properties including high conductivity, facile preparation and intriguing redox behavior. In this article, a functionalized graphene-grafted nanostructured PANI nanocomposite was applied for determining the ascorbic acid (AA) level. A significant current response was observed after treating the electrode surface with methacrylated graphene oxide (MeGO)/PANI nanocomposite. The amperometric responses showed a robust linear range of 8–5,000 µM and detection limit of 2 µM (N = 5). Excellent sensor selectivity was demonstrated in the presence of electroactive components interfering species, commonly found in real serum samples. This sensor is a promising candidate for rapid and selective determination of AA.

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.

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