Non-enzymatic glucose sensors based on controllable nanoporous gold/copper oxide nanohybrids

Xiao, Xinxin; Wang, Mengen; Li, Hui; Pan, Yu‐Chen; Si, Pengchao

doi:10.1016/j.talanta.2014.03.030

Cited by 86 publications

(58 citation statements)

References 38 publications

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“…[1][2][3] As a sensing material for electrochemical detection, copper nanostructures have many unique properties such as the enhanced mass-transport rate, high surface to volume ratio, and the improved signal-to-noise ratio in electroanalytical measurements. 4 These characteristics significantly affect the electrochemical reactions, and promote the potential applications for catalysis and detection of a number of biochemical substances such as glucose, 5,6 COD (chemical oxygen demand), 7,8 kojic acid, 9 sulfite 10 and nitrate. 11,12 A lot of work has been published in discussing the synthesis, characterization and application of copper nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Copper nano-clusters prepared by one-step electrodeposition and its application on nitrate sensing

Sun

Bian

et al. 2015

AIP Advances

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This paper describes the fabrication and characterization of copper nano-clusters prepared by a simple one-step electrodeposition process on platinum microelectrode, and the application for nitrate determination. The one-step electrodepostion process was performed by chronoamperometry scan in acidic copper sulphate electrolyte directly. The SEM and electrochemical examination showed that the morphologies and microstructures of deposited copper layers can be precisely controlled by using different deposition voltages. It was found that the copper layer is porous when the deposition voltage is higher than -500 mV, and this porous layer has a larger effective surface area compared with the corresponding smooth flat copper layer deposited under voltage less than -300 mV. Under the optimized deposition voltage, copper clusters constructed by uniform nanoparticles with an average diameter of about 100 nm can be obtained. The mechanism of electrodeposition process for this method was also speculated. The copper layers deposited under different voltages are used in a series of tests in order to evaluate their performance for nitrate sensing. The experimental results reveal that the microelectrode modified by fixed potential deposition under -700 mV had a higher sensitivity of 39.31 μA/mmolL−1 for nitrate detection within the concentration ranging from 0.1 mmolL−1 to 4.0 mmolL−1.

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Section: Introductionmentioning

confidence: 99%

Copper nano-clusters prepared by one-step electrodeposition and its application on nitrate sensing

Sun

Bian

et al. 2015

AIP Advances

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“…In both metal oxide modification cases (NPG/CuO and NPG/Co 3 O 4 ), however, no response to glucose was observed at neutral pH. Thus dilution of serum samples in alkaline media is generally required [90].…”

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confidence: 99%

An overview of dealloyed nanoporous gold in bioelectrochemistry

Xiao

Magner

2016

Bioelectrochemistry

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“…Compared to metals, metal oxides have lower electronic conductivity, which greatly restricts their wide applications in electrochemistry such as the design of electrochemical sensors with superior performance. Consequently, one of the logical solutions to boost their electronic conductivity is to construct composite materials by hybridizing them with noble metal nanoparticles [77,78]. For instance, a kind of dealloyed nanoporous gold (NPG) modified by ultrathin CuO film (obtained by electrodeposition) demonstrated a good performance as a non-enzymatic electrode for a glucose sensor, exhibiting a high sensitivity of 374.0 µA·mM -1 ·cm -2 in a wide linear range up to 12 mM glucose and good anti-interference ability [78].…”

Section: Platinum and Gold-free Electrodes: Earth-abundant Transitionmentioning

confidence: 99%

“…Consequently, one of the logical solutions to boost their electronic conductivity is to construct composite materials by hybridizing them with noble metal nanoparticles [77,78]. For instance, a kind of dealloyed nanoporous gold (NPG) modified by ultrathin CuO film (obtained by electrodeposition) demonstrated a good performance as a non-enzymatic electrode for a glucose sensor, exhibiting a high sensitivity of 374.0 µA·mM -1 ·cm -2 in a wide linear range up to 12 mM glucose and good anti-interference ability [78]. Contrary to the claims in the paper (promising glucose sensing in food and human blood), it is important to note that the obtained data are insufficient to support the conclusion since the experiments were conducted in a highly strong alkaline solution (0.1 M NaOH, pH 13), which makes the experimental conditions very different from reality.…”

Section: Platinum and Gold-free Electrodes: Earth-abundant Transitionmentioning

confidence: 99%

Nanostructured Inorganic Materials at Work in Electrochemical Sensing and Biofuel Cells

et al. 2017

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Abstract:The future of analytical devices, namely (bio)sensors, which are currently impacting our everyday life, relies on several metrics such as low cost, high sensitivity, good selectivity, rapid response, real-time monitoring, high-throughput, easy-to-make and easy-to-handle properties. Fortunately, they can be readily fulfilled by electrochemical methods. For decades, electrochemical sensors and biofuel cells operating in physiological conditions have concerned biomolecular science where enzymes act as biocatalysts. However, immobilizing them on a conducting substrate is tedious and the resulting bioelectrodes suffer from stability. In this contribution, we provide a comprehensive, authoritative, critical, and readable review of general interest that surveys interdisciplinary research involving materials science and (bio)electrocatalysis. Specifically, it recounts recent developments focused on the introduction of nanostructured metallic and carbon-based materials as robust "abiotic catalysts" or scaffolds in bioelectrochemistry to boost and increase the current and readout signals as well as the lifetime. Compared to biocatalysts, abiotic catalysts are in a better position to efficiently cope with fluctuations of temperature and pH since they possess high intrinsic thermal stability, exceptional chemical resistance and long-term stability, already highlighted in classical electrocatalysis. We also diagnosed their intrinsic bottlenecks and highlighted opportunities of unifying the materials science and bioelectrochemistry fields to design hybrid platforms with improved performance.

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Non-enzymatic glucose sensors based on controllable nanoporous gold/copper oxide nanohybrids

Cited by 86 publications

References 38 publications

Copper nano-clusters prepared by one-step electrodeposition and its application on nitrate sensing

Copper nano-clusters prepared by one-step electrodeposition and its application on nitrate sensing

An overview of dealloyed nanoporous gold in bioelectrochemistry

Nanostructured Inorganic Materials at Work in Electrochemical Sensing and Biofuel Cells

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