School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
Sensors (Basel). 2012 Sep 26;12(10):13019-33. doi: 10.3390/s121013019.
In this work we investigated the surface and facet-dependent catalytic properties of metal oxide particles as well as noble metal/metal oxide heterogeneous structures, with cuprous oxide (Cu(2)O) and Au/Cu(2)O being selected as model systems. As an example of application, we explored the potential of these materials in developing electrocatalytic devices. Cu(2)O particles were synthesized in various shapes, then used for testing their morphology-dependent electrochemical properties applied to the detection of glucose. While we did not attempt to obtain the best detection limit reported to date, the octahedral and hexapod Cu(2)O particles showed reasonable detection limits of 0.51 and 0.60 mM, respectively, which are physiologically relevant concentrations. However, detection limit seems to be less affected by particle shapes than sensitivity. Heterogeneous systems where Au NPs were deposited on the surface of Cu(2)O particles were also tested with similar results in terms of the effect of surface orientation.
在这项工作中，我们研究了金属氧化物颗粒以及贵金属/金属氧化物异质结构的表面和晶面依赖性催化特性，选择氧化亚铜（Cu2O）和 Au/Cu2O 作为模型体系。作为应用的一个例子，我们探索了这些材料在开发电催化装置方面的潜力。合成了各种形状的 Cu2O 颗粒，然后用于测试其形态依赖性电化学性质，应用于葡萄糖的检测。虽然我们没有试图获得迄今为止报道的最佳检测限，但八面体和六足 Cu2O 颗粒的检测限分别为 0.51 和 0.60mM，这是具有生理相关性的浓度。然而，检测限似乎受颗粒形状的影响小于灵敏度。还测试了 Au NPs 沉积在 Cu2O 颗粒表面的非均相体系，其表面取向的影响也具有相似的结果。
