Temperature-induced amperometric glucose biosensor based on a poly(N-vinylcaprolactam)/graphene oxide composite film 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry
年/卷/期
2019 / 144 / 6
页码
1960-1967
ISSN号
0003-2654
作者单位
Key Lab Green Organ Synth & Applicat Hunan Prov, Xiangtan 411105, Peoples R China;Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China;Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China;Key Lab Green Organ Synth & Applicat Hunan Prov, Xiangtan 411105, Peoples R China;Key Lab Green Organ Synth & Applicat Hunan Prov, Xiangtan 411105, Peoples R China;Key Lab Green Organ Synth & Applicat Hunan Prov, Xiangtan 411105, Peoples R China;
作者
Xie, Yixi;Fei, Junjie;Chen, Chao;Zhao, Pengcheng;Ni, Meijun;Li, Chunyan;
摘要
A temperature-induced sensing film consisting of poly(N-vinylcaprolactam) (PVCL), graphene oxide (GO) and glucose oxidase (GOD) was fabricated and used to modify a glassy carbon electrode (GCE). The PVCL/GO/GOD/GCE composite film was characterized by electrochemical impedance spectroscopy (EIS). The morphological properties of the composite were investigated by scanning electron microscopy (SEM). The direct electron transfer (DET) of GOD was achieved. GOD at PVCL/GO/GOD/GCE exhibited a couple of well-defined redox peaks with a formal potential of -0.432 V (vs. Ag/AgCl). The composite film showed temperature-induced catalytic activity towards glucose. Large peak currents were observed by amperometry at -0.3(V (vs. Ag/AgCl) when the temperature was above the lower critical solution temperature (LCST) of PVCL, and then disappeared when it was below the LCST. The modified electrode displayed an excellent electrocatalytic response to glucose. The detection of glucose with the composite film ranged from 0.1 to 1.7 mmol L-1 above 35 degrees C. The constructed biosensor also possesses good stability, reproducibility and anti-interference ability.
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