Third generation biosensing matrix based on Fe-implanted ZnO thin film

Journal Article · Mon Sep 27 00:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3496456· OSTI ID:21466943

Saha, Shibu; Gupta, Vinay; Sreenivas, K ^[1]; Tan, H H; Jagadish, C ^[2]

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1. Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)
2. Department of Electronic Materials Engineering, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200 (Australia)

Third generation biosensor based on Fe-implanted ZnO (Fe-ZnO) thin film has been demonstrated. Implantation of Fe in rf-sputtered ZnO thin film introduces redox center along with shallow donor level and thereby enhance its electron transfer property. Glucose oxidase (GOx), chosen as model enzyme, has been immobilized on the surface of the matrix. Cyclic voltammetry and photometric assay show that the prepared bioelectrode, GOx/Fe-ZnO/ITO/Glass is sensitive to the glucose concentration with enhanced response of 0.326 {mu}A mM{sup -1} cm{sup -2} and low Km of 2.76 mM. The results show promising application of Fe-implanted ZnO thin film as an attractive matrix for third generation biosensing.

• OSTI ID: 21466943
• Journal Information: Applied Physics Letters, Vol. 97, Issue 13; Other Information: DOI: 10.1063/1.3496456; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHARGE EXCHANGE
ELECTRON TRANSFER
GLASS
GLUCOSE
HETEROJUNCTIONS
IRON
MATRIX MATERIALS
OXIDASES
OXIDATION
PHOTOMETRY
REDUCTION
SEMICONDUCTOR MATERIALS
SENSORS
SURFACES
THIN FILMS
VOLTAMETRY
ZINC OXIDES
ALDEHYDES
CARBOHYDRATES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENZYMES
FILMS
HEXOSES
MATERIALS
METALS
MONOSACCHARIDES
ORGANIC COMPOUNDS
OXIDES
OXIDOREDUCTASES
OXYGEN COMPOUNDS
PROTEINS
SACCHARIDES
SEMICONDUCTOR JUNCTIONS
TRANSITION ELEMENTS
ZINC COMPOUNDS