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arXiv 0811.3091cond-mat.mtrl-sci
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石墨烯气敏传感器的本征响应

Intrinsic Response of Graphene Vapor Sensors

Yaping Dan, Ye Lu, Nicholas J. Kybert, A. T. Charlie Johnson

摘要:

石墨烯是一种纯二维材料,具有非常有利的化学传感器特性。然而,已知的是,常规的纳米光刻处理通常在石墨烯表面上留下抗蚀剂残留物,其对系统的传感器特性的影响尚未确定。在这里,我们表明污染层既降低了石墨烯的电子特性,又掩盖了石墨烯的固有传感器响应。污染层对石墨烯进行化学掺杂,增强载流子散射,并充当吸收层,将分析物分子集中在石墨烯表面,从而增强传感器响应。我们展示了一种清洁过程,可验证地去除设备结构上的污染,并允许测量石墨烯的固有化学反应。

英文摘要:

Graphene is a purely two-dimensional material that has extremely favorable chemical sensor properties. It is known, however, that conventional nanolithographic processing typically leaves a resist residue on the graphene surface, whose impact on the sensor characteristics of the system has not yet been determined. Here we show that the contamination layer both degrades the electronic properties of the graphene and masks graphene s intrinsic sensor responses. The contamination layer chemically dopes the graphene, enhances carrier scattering, and acts as an absorbent layer that concentrates analyte molecules at the graphene surface, thereby enhancing the sensor response. We demonstrate a cleaning process that verifiably removes the contamination on the device structure and allows the intrinsic chemical responses of graphene to be measured.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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