Graphene-based gas sensor: metal decoration effect and application to a flexible device

被引：242

作者：

Cho, Byungjin ^{[1
]}

Yoon, Jongwon ^{[2
]}

Hahm, Myung Gwan ^{[1
]}

Kim, Dong-Ho ^{[1
]}

Kim, Ah Ra ^{[1
]}

Kahng, Yung Ho ^{[3
]}

Park, Sang-Won ^{[1
]}

Lee, Young-Joo ^{[1
]}

Park, Sung-Gyu ^{[1
]}

Kwon, Jung-Dae ^{[1
]}

Kim, Chang Su ^{[1
]}

Song, Myungkwan ^{[1
]}

Jeong, Yongsoo ^{[1
]}

Nam, Kee-Seok ^{[1
]}

Ko, Heung Cho ^{[2
]}

机构：

[1] Korea Inst Mat Sci, Adv Funct Thin Films Dept, Surface Technol Div, Chang Won 641831, Gyeongnam, South Korea

[2] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea

[3] Chonnam Natl Univ, Dept Phys Educ, Kwangju 500757, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2014年 / 2卷 / 27期

关键词：

CARBON NANOTUBES; INTRINSIC STRENGTH; LAYER GRAPHENE; LARGE-AREA; OXIDE; NANOPARTICLES; SENSITIVITY; TRANSPARENT; TRANSISTORS; GRAPHITE;

D O I：

10.1039/c4tc00510d

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Roles of metal nanoparticles (NPs) on graphene-based devices were investigated in terms of gas-sensing characteristics of NO2 and NH3, and flexible gas sensing was also realized for future applications. The synergistic combination of metal NPs and graphene modulates the electronic properties of graphene, leading to enhancement of selectivity and sensitivity in gas-sensing characteristics. Introduction of palladium (Pd) NPs on the graphene accumulates hole carriers of graphene, resulting in the gas sensor being sensitized by NH3 gas molecular adsorption. In contrast, aluminum (Al) NPs deplete hole carriers, which dramatically improves NO2 sensitivity. Furthermore, the sensitivity of flexible graphene-based gas sensors was also enhanced via the same approach, even after 10(4) bending cycles and was maintained after 3 months.

引用

页码：5280 / 5285

页数：6

共 40 条

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