期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 10, 页码 7055-7062出版社
AMER CHEMICAL SOC
DOI: 10.1021/am501799w
关键词
silicon nanowire; mitigated conglomeration; cupric oxide; precursor-mediated; hydrogen peroxide; nonenzymatic sensor
资金
- National Natural Science Foundation of China [21236003, 21206042, 20925621, 21176083]
- Basic Research Program of Shanghai [13NM1400700, 13NM1400701]
- Fundamental Research Funds for the Central Universities
- Shanghai Leading Academic Discipline Project [B502]
A finely dispersed CuO nanoparticle electrocatalyst on a silicon nanowire (SiNW) was achieved via a designed, precursor-mediated strategy by combining metal-assisted chemical etching, electroless deposition, and thermal oxidation. The CuO assembled on silicon nanowires (CuO-SiNWs) showed a competent sensitivity of 22.27 mu A/mM, a wider linear range from 0.01 to 13.18 mM, and a comparable detection limit of 1.6 mu M (3S/N) for nonenzymatic H2O2 detection. The archetype sensor also demonstrated eligible selectivity against common interfering species. By the introduction of the SiNW carrier, which led to mitigated conglomeration of the electrocatalyst and a favorable microstructure of the electrocatalyst-carrier system, improved signal-concentration linearity and higher electrocatalyst utilization efficiency were obtained with CuO-SiNWs. These results demonstrated the feasibility of the synthetic strategy and the potential of the nanocomposite as a promising candidate for H2O2 sensing.
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