文摘
ZnO nanowires were synthesized hydrothermally on a glass substrate, and then decorated with Pt nanoparticles to fabricate the working electrode for a non-enzymatic glucose biosensor. The Pt nanoparticles, acting as a catalyst, enhanced the biosensor’s glucose sensitivity 10-fold in comparison with the initial ZnO nanowires electrode. Under the UV and green LEDs, the respective wavelengths of which were 367 nm and 539 nm, the sensing current of the Pt-nanoparticle-decorated ZnO nanowires biosensors increased ∼4 times. These biosensors under UV and green illumination feature superior sensitivity (UV: 928.1 μA cm−2 mM−1, green: 123.0 μA cm−2 mM−1) than those reported in previous non-enzymatic glucose sensing studies. The performance of these non-enzymatic glucose-sensing biosensors was enhanced by reducing the Schottky barrier and localizing the surface plasmonic resonance effect under such illumination.
