Vertically Aligned Pd Nanowires for Glucose Oxidase Bioanode

Slaughter, Gymama; Amoah, Kweku

doi:10.4172/2155-6210.1000124

Cited by 9 publications

(4 citation statements)

References 21 publications

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“…In 2016, Slaughter and co‐workers from University of Maryland, Baltimore County in the U.S. integrated charge pump and capacitors with BFCs to develop a self‐powered glucose biosensor . The charge pump amplified the voltage generated by the BFCs, and then the resulting amplified voltage charged the capacitor, which functioned like a transducer.…”

Section: Substrate Effectmentioning

confidence: 99%

Recent Advances in the Construction of Biofuel Cells Based Self‐powered Electrochemical Biosensors: A Review

Liu

et al. 2018

Electroanalysis

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The application of biofuel cells (BFCs) for the construction of self‐powered electrochemical biosensors has recently received enormous attention with exciting advancements. The principle of BFCs for electrochemical biosensing is that the BFCs’ power output which is directly extracted by the biological reactions with the help of biocatalysts is closely related to the analyte's concentration. Such unique feature makes BFCs based electrochemical biosensors with two‐electrode system to be operated without the need of any external power source, which provides a more effective way for the miniaturization and convenient construction of electrochemical biosensors than the traditional electrochemical biosensors with three‐electrode system. Following our previous reviews (Electroanalysis 2012, 24, 197–209; Electroanalysis 2015, 27, 1786–1801), the current review is focused on the recent development and advances in the construction of BFCs based self‐powered electrochemical biosensors which are reported in the years between 2015 and 2018, with a particular emphasis on their possible practical applications in the fields of medical diagnosis, environmental monitoring, food analysis and wearable devices. For these reported BFCs‐based self‐powered electrochemical biosensors, the design approaches are still within the scope of effects (i.e., substrate, inhibition, blocking, gene regulation, enzyme, co‐stabilization, competition, and hybrid effects) summarized by our previous reviews. The outlook, challenges and developing tendency of the future research for the construction of BFCs based self‐powered electrochemical biosensor are discussed in the end. We expect that the advanced electrochemical biosensors based on BFCs with the unique self‐powered capability will continue attracting increasing research interest and lead to new opportunities in various attractive applications related to analytical chemistry.

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Section: Substrate Effectmentioning

confidence: 99%

Recent Advances in the Construction of Biofuel Cells Based Self‐powered Electrochemical Biosensors: A Review

Liu

et al. 2018

Electroanalysis

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“…These multimolecular ensembles are not readily adaptable for batch fabrication and are insufficient to provide the long-term power that bio-implantable electronic devices require. Moreover, current biofuel cells still rely on the immobilization of biocatalyst on low-cost anodic and cathodic materials that are good electrical conductors, such as carbon nanotubes [15e18] and nanowires [9]. Nevertheless, these enzymatic based biofuel cells are still limited by the short lifetimes of the enzymes due to the denaturation and desorption of the enzymes.…”

Section: Introductionmentioning

confidence: 99%

Energy conversion from aluminium and phosphate rich solution via ZnO activation of aluminium

Slaughter

Sunday

Stevens

2015

Materials Chemistry and Physics

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h i g h l i g h t s g r a p h i c a l a b s t r a c t ZnO activation of metallic Al for generating electricity for bioelectronic applications. Selective electrocatalysis in phosphate rich electrolyte. A cell operating in physiological saline buffer produces an open-circuit voltage of 0.751 V. A maximum power density of 1.77 mW cm À2 was obtained.a b s t r a c t Electrochemical power sources have motivated intense research efforts in the development of alternative 'green' power sources for ultra-low powered bioelectronic devices. Biofuel cells employ immobilized enzymes to convert the available chemical energy of organic fuels directly into electricity. However, biofuel cells are limited by short lifetime due to enzyme inactivation and frequent need to incorporate mediators to shuttle electrons to the final electron acceptor. In this context, other electrochemical power sources are necessary in energy conversion and storage device applications. Here we report on the fabrication and characterization of a membrane-free aluminium/phosphate cell based on the activation of aluminium (Al) using ZnO nanocrystal in an Al/phosphate cell as a 'green' alternative to the traditional enzymatic biofuel cells. The hybrid cell operates in neutral phosphate buffer solution and physiological saline buffer. The ZnO modifier in the phosphate rich electrolyte activated the pitting of Al resulting in the production of hydrogen, as the reducing agent for the reduction of H 2 PO 4 À ions to HPO 3 2À ions at a formal potential of À0.250 V vs. Ag/AgCl. Specifically, the fabricated cell operating in phosphate buffer and physiological saline buffer exhibit an open-circuit voltage of 0.810 V and 0.751 V and delivered a maximum power density of 0.225 mW cm À2 and 1.77 mW cm À2 , respectively. Our results demonstrate the feasibility of generating electricity by activating Al as anodic material in a hybrid cell supplied with phosphate rich electrolyte. Our approach simplifies the construction and operation of the electrochemical power source as a novel "green" alternative to the current anodic substrates used in enzymatic biofuel cells for low power bioelectronics applications.

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“…The resurgent development of biofuel cell devices has been driven by the mass-market acceptance of conventional fuel cell technologies, in which many efforts have been devoted to biocatalytically modified electrode materials, specifically for sensor applications [1][2][3][4][5][6][7][8]. These research activities in biocatalytically modified metal electrodes have provided a significant technological foundation for current biofuel cell development.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of palladium nanowire array electrode for biofuel cell application

Slaughter

Kulkarni

2016

Microelectronic Engineering

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Bioelectrocatalysis was demonstrated with palladium (Pd) nanowire array electrode via nonenzymatic and enzymatic methods for glucose, which was validated by the generation of anodic current in the presence of glucose. The vertically standing Pd nanowires used for the fabrication of the electrodes were on average 5.6 m in length and 64 nm in diameter. In comparison, the nonenzymatic bioanode exhibited lower current densities and required the application of larger overpotential which resulted in a large cell voltage drop (V oc = 13.5 mV) and limited power production when assembled as a biofuel cell under physiological conditions (pH 7, 0.1 M phosphate buffer saline) with laccase covalently bounded to Pd nanowires as the biocathode. The glucose/ O 2 biofuel cell was studied in phosphate buffer saline using the enzymatic bioanode that was developed with the co-immobilization of catalase and glucose oxidase on Pd nanowires and the laccase-Pd as the biocathode. The biofuel cell exhibited an open-circuit voltage of 0.506 V, delivered a maximum power density of 72 µW cm-2 at a cell voltage of 0.25 V and a short-circuit current density of 411 A cm-2 when operating in 10 mM glucose. Such low-cost lightweight glucose/ O 2 biofuel cells have a great promise to be optimized, miniaturized to power bio-implantable devices.

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Vertically Aligned Pd Nanowires for Glucose Oxidase Bioanode

Cited by 9 publications

References 21 publications

Recent Advances in the Construction of Biofuel Cells Based Self‐powered Electrochemical Biosensors: A Review

Recent Advances in the Construction of Biofuel Cells Based Self‐powered Electrochemical Biosensors: A Review

Energy conversion from aluminium and phosphate rich solution via ZnO activation of aluminium

Fabrication of palladium nanowire array electrode for biofuel cell application

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