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Screen-printed graphite microbands as a versatile biosensor platform
Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-8478-4663
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics.
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics.
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2014 (English)In: 24th Anniversary World Congress on Biosensors – Biosensors 2014, Elsevier, 2014Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

The use of extremely small working electrodes offers a variety of benefits for electroanalysis. The enhanced mass transport as a result of convergent diffusion is the most important advantage of microdimensional electrodes and results in improved of analytical performance The low detectable-currents problem can be solved by single microelectrode multiplication into an array, thus combining the advantages of enhanced mass transport and high output signals. The microband is one of the most cost-effective and easy-fabricated geometries for microelectrodes. The microband width is a critical microscopic dimension of the electrode, which maintains the dominance of convergent diffusion, whereas the microband length is macroscopic and ensures registration of high currents.

Graphite screen-printing on a plastic support is a standard technology for large-scale production of low cost electrochemical devices. This has been combined with simple guillotine cutting to fabricate of microband arrays for autonomous environmental and clinical monitoring.

Single-layer and multilayer microband arrays of different band lengths were produced and characterised using optical and electrochemical methods. The critical dimension for the microband width to facilitate convergent diffusion was assessed electrochemically and found to be in the order of 5 microns. The developed electrode structures were used as a versatile platform for the manufacture of model electroanalytical systems. Direct oxidation of ascorbic acid was explored at the microband arrays and a glucose biosensor based on mediated and immobilised glucose oxidase was fabricated. Both examples yielded significant enhancement of the analytical performance.

A: the layout of the screen-printed graphite microband array of 5 electrode layers. B: voltammmetric responses obtained at the microband arrays.

Acknowledgement: Formas and Security Link for financial support; David Nilsson (Acreo) for screen-printing.

Place, publisher, year, edition, pages
Elsevier, 2014.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-108447OAI: oai:DiVA.org:liu-108447DiVA: diva2:730387
Conference
24th Anniversary World Congress on Biosensors – Biosensors 2014, 27-30 May 2014, Melbourne, Australia
Funder
Formas
Available from: 2014-06-27 Created: 2014-06-27 Last updated: 2017-11-03

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Vagin, Mikhail YLundström, IngemarTurner, AnthonyEriksson, Mats

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Vagin, Mikhail YLundström, IngemarTurner, AnthonyEriksson, Mats
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