模板辅助生长的高定向3D石墨烯pH传感器为生物传感器开辟了新途径

V. Perumal, N. M. Mohamed, M. S. M. Saheed, M. S. M. Saheed
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引用次数: 0

摘要

近年来,独立单片三维石墨烯的高柔韧性和优异的导电性在实时传感电子传感器领域引起了广泛的关注。在这项工作中,我们通过化学气相沉积(CVD)合成了独立的单片3D石墨烯,使用泡沫镍作为pH传感的牺牲模板。利用扫描电镜和拉曼光谱对其表面形貌和结构形貌进行了表征。结果表明,制备出的三维石墨烯具有高取向性和无缺陷性,可以模拟镍模板表面,且三维石墨烯微孔结构在镍模板蚀刻后仍能保持原有结构。在恒定电流为1μA时,pH (pH-4至pH-10)对应的电压与电流和电阻如图所示。结果表明,所制备的三维石墨烯器件具有线性回归R =(211.90−13.67pH)和测量灵敏度13.67 Ω/pH。合成的三维石墨烯为开发高灵敏度、高选择性和高柔性的传感平台铺平了道路,为生物传感器的发展提供了一条新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Template-assisted growth of highly oriented 3D graphene pH sensor towards new avenues for biosensor
In recent times, the high flexibility and exceptional electrical conductivity of free-standing monolithic 3D graphene has attracted considerable attention in the field of electronic sensor development for real time sensing. In this work, we have synthesized free-standing monolithic 3D graphene through chemical vapor deposition (CVD) using nickel foam as a sacrificial template for pH sensing. The surface and structural morphology were characterized by scanning electron microscopy and Raman spectroscopy. The results show a highly oriented and defect free monolithic 3D graphene which imitates the nickel template surface and the 3D graphene microporous structure firmly retained its structure even after Ni template etching. The voltage versus current and resistance corresponding to pH (pH-4 to pH-10) at constant current of 1μA are detailed in delineated graphs. It shows a linear regression of R = (211.90 −13.67pH) and a measured sensitivity of 13.67 Ω/pH for the developed 3D graphene device. The synthesized 3D graphene paves a way for the development of highly sensitive, selective and flexible sensing platform which presents a new avenue for biosensor development.
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