State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Science , Taiyuan 030001, China.
ACS Appl Mater Interfaces. 2015 Mar 4;7(8):4772-7. doi: 10.1021/am508508m. Epub 2015 Feb 18.
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.
通过原子层沉积（ALD）将氧化镍纳米颗粒沉积在碳化硅颗粒上。通过电感耦合等离子体原子发射光谱（ICP-AES）、X 射线光电子能谱（XPS）和透射电子显微镜（TEM）研究了 NiO/SiC 混合材料的结构。通过改变 NiO ALD 的循环次数，可以灵活调整 NiO 纳米颗粒的尺寸。电化学测量表明，在碱性电解质中，经过 600 次 NiO ALD 制备的 NiO/SiC 具有最低的检测限 0.32 μM（S/N = 3），最高的葡萄糖传感能力，灵敏度为 2.037 mA mM(-1) cm(-2)，线性检测范围约为 4 μM 至 7.5 mM，稳定性良好。其灵敏度约为商业 NiO 纳米颗粒和通过传统的初始湿浸渍法制备的 NiO/SiC 纳米复合材料的 6 倍。研究表明，ALD NiO/SiC 的优异电化学性能归因于 NiO 与 SiC 基底之间的强相互作用以及 NiO 纳米颗粒在 SiC 表面上的高分散性。这些结果表明，ALD 是在 SiC 上沉积 NiO 用于非酶葡萄糖传感的有效方法。
