Nonenzymatic Glucose Sensor Based on Au/ZnO Core-Shell Nanostructures Decorated with Au Nanoparticles and Enhanced with Blue and Green Light.
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/cm2mM-1, 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.
Department of Electrical Engineering, National University of Tainan , Tainan 700, Taiwan.
Cheng-Liang
0000-0001-7318-9738
CL
Hsu
Department of Electrical Engineering, National University of Tainan , Tainan 700, Taiwan.
Yu-Jui
YJ
Fang
National Nano Device Laboratories , Tainan 741, Taiwan.
Ting-Jen
TJ
Hsueh
Institute of Microelectronics & Department of Electrical Engineering Center for Micro/Nano Science and Technology Advanced Optoelectronic Technology Center, National Cheng Kung University , Tainan 701, Taiwan.
Sin-Hui
SH
Wang
Institute of Microelectronics & Department of Electrical Engineering Center for Micro/Nano Science and Technology Advanced Optoelectronic Technology Center, National Cheng Kung University , Tainan 701, Taiwan.
Shoou-Jinn
SJ
Chang
D055664:Electrochemical Techniques; D005947:Glucose / Q000032:analysis*; D006046:Gold / Q000737:chemistry; D008027:Light; D008163:Luminescent Measurements; D049329:Nanostructures / Q000737:chemistry*; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry
D006046:Gold; D005947:Glucose; D015034:Zinc Oxide