基于化学衍生石墨烯的实用型化学传感器。

Practical chemical sensors from chemically derived graphene.

作者信息

Fowler Jesse D, Allen Matthew J, Tung Vincent C, Yang Yang, Kaner Richard B, Weiller Bruce H

机构信息

Materials Processing and Evaluation Department, Space Materials Laboratory, The Aerospace Corporation, P.O. Box 92957/M2-248, Los Angeles, California 90009, USA.

出版信息

ACS Nano. 2009 Feb 24;3(2):301-6. doi: 10.1021/nn800593m.

DOI:10.1021/nn800593m

PMID:19236064

Abstract

We report the development of useful chemical sensors from chemically converted graphene dispersions using spin coating to create single-layer films on interdigitated electrode arrays. Dispersions of graphene in anhydrous hydrazine are formed from graphite oxide. Preliminary results are presented on the detection of NO(2), NH(3), and 2,4-dinitrotoluene using this simple and scalable fabrication method for practical devices. Current versus voltage curves are linear and ohmic in all cases, studied independent of metal electrode or presence of analytes. The sensor response is consistent with a charge transfer mechanism between the analyte and graphene with a limited role of the electrical contacts. A micro hot plate sensor substrate is also used to monitor the temperature dependence of the response to nitrogen dioxide. The results are discussed in light of recent literature on carbon nanotube and graphene sensors.

摘要

我们报道了利用化学转化的石墨烯分散体，通过旋涂在叉指电极阵列上制备单层膜，从而开发出实用的化学传感器。氧化石墨烯可形成石墨烯在无水肼中的分散体。利用这种简单且可扩展的制造方法制备实际器件，展示了对NO₂、NH₃和2,4 - 二硝基甲苯检测的初步结果。在所有情况下，电流与电压曲线均为线性且符合欧姆定律，研究过程与金属电极无关且不受分析物存在与否的影响。传感器响应与分析物和石墨烯之间的电荷转移机制一致，电接触的作用有限。还使用了微热板传感器基板来监测对二氧化氮响应的温度依赖性。结合近期关于碳纳米管和石墨烯传感器的文献对结果进行了讨论。