Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

作者：Saha Shibu; Gupta Vinay^*

来源：AIP Advances, 2011, 1(4): 042112.

DOI：10.1063/1.3654497

Highly c-axis oriented Al and Fe co-doped ZnO (ZAF) thin film is prepared by pulsed laser deposition. Fe introduces redox centre along with shallow donor level while Al doping enhances conductivity of ZnO, thus removing the requirement of both mediator and bottom conducting layer in bioelectrode. Model enzyme (glucose oxidase), was immobilized on surface of ZAF matrix. Cyclic voltammetry and photometric assay show that prepared bio-electrode is sensitive to glucose concentration with enhanced response of 0.18 mu AmM(-1)cm(-2) and low Km similar to 2.01 mM. The results illustrate that ZAF is an attractive matrix for realization of miniaturized mediator-less solid state biosensor.

• 出版日期2011-12