Practical Chemical Sensors from Chemically Derived Graphene
Practical Chemical Sensors from Chemically Derived Graphene
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DOI：
10.1021/nn800593m
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发表时间：
2009-02-01
期刊：
影响因子：
17.1
通讯作者：
Weiller, Bruce H.
中科院分区：
文献类型：
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作者：
Fowler, Jesse D.;Allen, Matthew J.;Weiller, Bruce H.
我们报告了有用的化学传感器的发展，从化学召开的石墨烯分散体，使用旋涂，以创建单层膜上的叉指电极阵列。石墨烯在无水肼中的分散体由氧化石墨形成。NO2，NH3，和2，4-二硝基甲苯的检测，使用这种简单的和可扩展的制造方法的实际设备的初步结果。在所有情况下，电流-电压曲线都是线性和欧姆的，研究独立于金属电极或分析物的存在。传感器响应与分析物和石墨烯之间的电荷转移机制一致，其中电接触的作用有限。微热板传感器基板也被用来监测二氧化氮的响应的温度依赖性。结果进行了讨论，根据
We report the development of useful chemical sensors from chemically convened 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 NO2, NH3, 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