期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 210, 期 -, 页码 190-196出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.12.113
关键词
Non-enzymatic glucose sensor; Nanosheet arrays; Electrode position; Self-supported; Reproducibility
资金
- National Science Foundation of China (NSFC) [21203044]
- Fundamental Research Funds for the Central Universities [HIT. IBRSEM. A. 201407]
Porous CoOOH nanosheet arrays are constructed on Ti foils by an electrochemical assistant method. The nano sheet arrays exhibit hierarchical porous structures with a specific surface area of 470 m(2)g(-1). The as-prepared CoOOH nanosheet arrays are used for glucose detection as a non-enzymatic sensor. The amperometric detection of glucose is carried out at 0.52 V (versus Ag/AgCl). The amperometric signals are linearly proportional to glucose concentration from 3 mu M to 1.109 mM (R = 0.995), showing a low detection limit (S/N = 3) of 1.37 mu M and a high sensitivity of 526.8 +/- mu AmM(-1)cm(-2) . The high sensitivity towards glucose is mainly attributed to the freestanding and self-supported features of hierarchical porous CoOOH nanosheet arrays on a conducting substrate. The most attractive feature of the array electrodes is the reproducibility, which helps the relative standard deviation of the response currents to glucose from five electrodes is 3.21%. (C) 2015 Elsevier B.V. All rights reserved.
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