石墨烯
氧化物
材料科学
拉曼光谱
氢
等离子体
氧气
辐照
电导率
纳米技术
石墨烯纳米带
分析化学(期刊)
化学工程
光电子学
化学
光学
色谱法
物理化学
冶金
核物理学
有机化学
工程类
物理
量子力学
作者
Ali Jabbar Fraih,Huda Musa Mutlaq
出处
期刊:European Physical Journal-applied Physics
日期:2021-09-01
卷期号:95 (3): 30101-30101
标识
DOI:10.1051/epjap/2021210108
摘要
Graphene with high electronic transport, large surface-to-volume ratio and nanometer thickness is excellent for gas sensing applications. However, its sensitivity and recovery face serious limitations in practical considerations. In this study, graphene oxide (Go) sheets were synthesized and exposed to hydrogen (H 2 ) plasma to reduced it into a reduced graphene oxide (rGo) in a controlled procedure. In this regard, Go sheets were irradiated with plasma at different times and their electrical properties were evaluated. The results showed that with increasing bombardment time from 2 to 8 min, the conductivity of the sheets increased but for a longer time no significant increase was observed compared to 8 min. Raman spectroscopy also showed that the increase in plasma radiation led to an increase in defects within the sheets. The appearance of defects in rGo improved its sensitivity to oxygen (O 2 ) gas, but nevertheless reduced its recovery time. Therefore, by introducing the plasma bombardment process in a completely controlled way, we showed that the sensitivity and recovery time of rGo can be effectively tuned.
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