Laboratory of Integrated Systems, EPFL - École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
Nanoscale. 2013 Dec 21;5(24):12448-55. doi: 10.1039/c3nr03283c.
Multi-walled carbon nanotubes and graphene nanoflowers were grown by a catalytic chemical vapor deposition process on metal surfaces. Electrodeposition was used as a versatile technique to obtain three different iron catalyst coatings on platinum microelectrodes. The influence of growth parameters on carbon deposits was investigated. Characterization was carried out by scanning electron microscopy and Raman spectroscopy. A chemical treatment in sulphuric acid produced an increased voltammetric background current. In Raman spectra, the effect of the chemical treatment is seen as a more pronounced sp(3) hybridisation mode of C resulting from surface functionalization of the C nanomaterials. Overall, the hybrid electrodes we produced exhibit a promising performance for oxidase-based array biosensors. Therefore, our study opens the possibility of integrating the hybrid electrodes in biochip applications.
多壁碳纳米管和石墨烯纳米花通过金属表面的催化化学气相沉积工艺生长。电沉积作为一种通用技术，用于在铂微电极上获得三种不同的铁催化剂涂层。研究了生长参数对碳沉积物的影响。通过扫描电子显微镜和拉曼光谱进行了表征。硫酸的化学处理产生了增加的伏安背景电流。在拉曼光谱中，化学处理的影响表现为 C 的 sp(3)杂化模式更加明显，这是由于 C 纳米材料的表面功能化。总的来说，我们制备的混合电极在基于氧化酶的阵列生物传感器中表现出良好的性能。因此，我们的研究为混合电极在生物芯片应用中的集成提供了可能性。
