title: NiO/SiC nanocomposite prepared by atomic layer deposition used as a novel electrocatalyst for nonenzymatic glucose sensing.
abstract: NiO nanoparticles are deposited onto SiC particles by atomic layer deposition (ALD). The structure of the NiO/SiC hybrid material is investigated by inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The size of the NiO nanoparticles is flexible and can be adjusted by altering the cycle number of the NiO ALD. Electrochemical measurements illustrate that NiO/SiC prepared with 600 cycles for NiO ALD exhibits the highest glucose sensing ability in alkaline electrolytes with a low detection limit of 0.32 μM (S/N = 3), high sensitivity of 2.037 mA mM(-1) cm(-2), a linear detection range from approximately 4 μM to 7.5 mM, and good stability. Its sensitivity is about 6 times of that for commercial NiO nanoparticles and NiO/SiC nanocomposites prepared by a traditional incipient wetness impregnation method. It is revealed that the superior electrochemical ability of ALD NiO/SiC is ascribed to the strong interaction between NiO and the SiC substrate and the high dispersity of NiO nanoparticles on the SiC surface. These results suggest that ALD is an effective way to deposit NiO on SiC for nonenzymatic glucose sensing.
authors: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Science , Taiyuan 030001, China.
authors: Peng
authors: P
authors: Yang
authors: Xili
authors: X
authors: Tong
authors: Guizhen
authors: G
authors: Wang
authors: Zhe
authors: Z
authors: Gao
authors: Xiangyun
authors: X
authors: Guo
authors: Yong
authors: Y
authors: Qin
mesh_terms: D015374:Biosensing Techniques; D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D055664:Electrochemical Techniques; D005947:Glucose / Q000032:analysis*; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D017655:Silicon Compounds / Q000737:chemistry*
chemical_list: D017554:Carbon Compounds, Inorganic; D017655:Silicon Compounds; D009532:Nickel; C028007:nickel monoxide; D005947:Glucose; C022088:silicon carbide
keywords: NiO nanoparticles; atomic layer deposition; electrocatalysis; glucose sensor; nonenzymatic; silicon carbide