用于自供电生物传感应用的还原氧化石墨烯上合成的 ZnO 纳米棒阵列的增强光电化学性能。
Enhanced photoelectrochemical property of ZnO nanorods array synthesized on reduced graphene oxide for self-powered biosensing application.
机构信息
State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
出版信息
Biosens Bioelectron. 2015 Feb 15;64:499-504. doi: 10.1016/j.bios.2014.09.055. Epub 2014 Sep 28.
We have realized the direct synthesis of ZnO nanorods (ZnO NRs) array on reduced graphene layer (rGO), and demonstrated the enhanced photoelectrochemical (PEC) property of the rGO/ZnO based photoanode under UV irradiation compared with the pristine ZnO NRs array. The introduction of the rGO layer resulted in a favorable energy band structure for electron migration, which finally led to the efficient photoinduced charge separation. Such nanostructure was subsequently employed for self-powered PEC biosensing of glutathione in the condition of 0 V bias, with a linear range from 10 to 200 µM, a detection limit of 2.17 µM, as well as excellent selectivity, reproducibility and stability. The results indicated the rGO/ZnO nanostructure is a competitive candidate in the PEC biosensing field.
我们实现了在还原氧化石墨烯（rGO）上直接合成氧化锌纳米棒（ZnO NRs）阵列，并证明了在紫外光照射下，rGO/ZnO 基光阳极的光电化学（PEC）性能相比于原始 ZnO NRs 阵列得到了增强。rGO 层的引入有利于电子迁移的能带结构，最终导致了有效的光诱导电荷分离。这种纳米结构随后被用于在 0 V 偏压下进行谷胱甘肽的自供电 PEC 生物传感，线性范围从 10 到 200 µM，检测限为 2.17 µM，具有出色的选择性、重现性和稳定性。结果表明，rGO/ZnO 纳米结构是 PEC 生物传感领域的一个有竞争力的候选者。
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