期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Charge transfer in graphene/polymer interfaces for CO2 detection
1
作者 Myungwoo Son Yusin Pak +12 位作者 Sang-Soo Chee Francis Malar Auxilia Kihyeun Kim Byung-Kee Lee sungeun Lee sun kil kang Chaedeok Lee Jeong Soo Lee Ki kang Kim Yun Hee Jang Byoung Hun Lee Gun-Young Jung Moon-Ho Ham 《Nano Research》 SCIE EI CAS CSCD 2018年第7期3529-3536,共8页
Understanding charge transfer processes between graphene and functional materials is crucial from the perspectives of fundamental sciences and potential applications, including electronic devices, photonic devices, an... Understanding charge transfer processes between graphene and functional materials is crucial from the perspectives of fundamental sciences and potential applications, including electronic devices, photonic devices, and sensors. In this study, we present the charge transfer behavior of graphene and amine-rich polyethyleneimine (PEI) upon CO2 exposure, which was significantly improved after introduction of hygroscopic polyethylene glycol (PEG) in humid air. By blending PEI and PEG, the number of protonated amine groups in PEI was remarkably increased in the presence of water molecules, leading to a strong electron doping effect on graphene. The presence of CO2 gas resulted in a large change in the resistance of PEI/PEG-co-functionalized graphene because of the dramatic reduction of said doping effect, reaching a maximum sensitivity of 32% at 5,000 ppm CO2 and an applied bias of 0.1 V in air with 60% relative humidity at room temperature. This charge transfer correlation will facilitate the development of portable graphene-based sensors for real-time gas detection and the extension of the applications of graphene-based electronic and photonic devices. 展开更多
关键词 GRAPHENE polyethyleneimine (PEI) polyethylene glycol carbon dioxide charge transfer
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部