Saha, ShibuGupta, VinaySreenivas, K.Tan, H. H.Jagadish, C.2015-09-182015-09-180003-6951http://hdl.handle.net/1885/15546Third 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 μA mM−1 cm−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.We are thankful to DST India and DIISR Australia for a grant under Indo-Australia strategic research initiative. Financial support from UGC is acknowledged by S.S., K.S., and V.G. S.S. is also thankful to University of Delhi for teaching assistantship. The Australian authors acknowledge financial support of the Australian National Council. Facilities at the ANU used in this work are supported by the Australian National Fabrication Facility.4 pageshttp://www.sherpa.ac.uk/romeo/issn/0003-6951..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 18/09/15). Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters and may be found at https://dx.doi.org/10.1063/1.34964562010-10-0110.1063/1.34964562015-12-09