Effects of molecular adsorption on carrier transport properties of large-size graphene

被引：5
|
作者：
Huang, Shiu-Ming [1 ]
Kumar, Pushpendra [2 ]
机构：
[1] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan
[2] Acad Sinica, Inst Atom & Mol Sci, Taipei 11529, Taiwan
来源：
JOURNAL OF APPLIED PHYSICS | 2015年 / 117卷 / 02期
关键词：
SENSITIVITY;
D O I：
10.1063/1.4905944
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The temperature dependent resistance and thermoelectric power of macroscopic graphenes are studied in various gas environments. The temperature dependent slope of resistance is weaker in gas environments with heavier molecules. Following the temperature dependent slopes of normalized resistance, one can identify the molecular mass of the environmental gas. This is relative to the atomically sharp potential modification due to adsorbed gas molecules on the graphene. The temperature dependent thermopower increases as the mass of the gas molecules increases. A universal relationship between resistance and thermoelectric power in various gas environments further confirms that the transport mechanism is dominated by the adsorbed gas molecules on the graphene surface. (C) 2015 AIP Publishing LLC.
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页数：5
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