Hsu Cheng-Liang, Fang Yu-Jui, Hsueh Ting-Jen, Wang Sin-Hui, Chang Shoou-Jinn
Department of Electrical Engineering, National University of Tainan , Tainan 700, Taiwan.
National Nano Device Laboratories , Tainan 741, Taiwan.
J Phys Chem B. 2017 Apr 13;121(14):2931-2941. doi: 10.1021/acs.jpcb.6b11257. Epub 2017 Mar 29.
Au/ZnO core-shell nanostructures decorated with Au nanoparticles were synthesized on an ITO/glass substrate. The investigated sensor contains 2-D, 1-D, and 0-D nanostructures to provide a large surface-area-to-volume ratio and catalytic quantum effect and to avoid the issues inherent in heterojunction interface barriers. The sensitivities of the fabricated glucose sensors in the dark and under blue and green LED illumination were 3371.9, 4410.9, and 4157.8 μA/cm mM, respectively. The achieved sensitivities are higher than previous reports on Au nanostructure sensors by 2-100 times. Further, the blue and green LED illumination respectively enhanced the sensitivity and CV glucose sensing currents by ∼30.8 and ∼23.3% and ∼27 and ∼35%. The detection limits of the glucose sensor in the dark and under visible illumination were the same at ∼0.5 μM. Moreover, these visible light illumination enhancements are attributed to the localized surface plasmon resonance effect.
在ITO/玻璃基板上合成了用金纳米颗粒装饰的金/氧化锌核壳纳米结构。所研究的传感器包含二维、一维和零维纳米结构，以提供大的表面积与体积比和催化量子效应，并避免异质结界面势垒固有的问题。所制备的葡萄糖传感器在黑暗中以及在蓝色和绿色LED光照下的灵敏度分别为3371.9、4410.9和4157.8 μA/cm mM。所实现的灵敏度比先前关于金纳米结构传感器的报道高2至100倍。此外，蓝色和绿色LED光照分别将灵敏度和循环伏安法葡萄糖传感电流提高了约30.8%和约23.3%，以及约27%和约35%。葡萄糖传感器在黑暗中和可见光照射下的检测限相同，约为0.5 μM。此外，这些可见光照射增强归因于局部表面等离子体共振效应。
