Cited 2 time in
Cited 2 time in
Charge transfer in graphene/polymer interfaces for CO2 detection
- Charge transfer in graphene/polymer interfaces for CO2 detection
- Kim, Kihyeun; Son, Myungwoo; Pak, Yusin; Chee, Sang-Soo; Auxilia, Francis Malar; Lee, Byung-Kee; Lee, Sungeun; Kang, Sun Kil; Lee, Chaedeok; Lee, Jeong Soo; Kim, Ki Kang; Jang, Yun Hee; Lee, Byoung Hun; Jung, Gun-Young; Ham, Moon-Ho
- DGIST Authors
- Jang, Yun Hee
- Issue Date
- Nano Research, 11(7), 3529-3539
- Article Type
- Blending; Carbon; Carbon Dioxide; Charge Transfer; Charge Transfer Process; Electron Doping Effects; Electronic Device; Functional Materials; Graphene; Graphene Devices; Graphene-Based Sensors; Maximum Sensitivity; Molecules; Photonic Devices; Polyethylene Glycol; Polyethylene Glycols; Polyethyleneimine; Polyethyleneimine (Pei); Polyethylenes; Presence Of Water; Protonated Amine
- 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. [Figure not available: see fulltext.]. © 2017, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.
- Tsinghua University Press
- Related Researcher
Jang, Yun Hee
CMMM Lab(Curious Minds Molecular Modeling Laboratory)
Multiscale molecular modeling (quantum mechanics calculation; molecular dynamics simulation) : Supercomputer-assisted molecular-level understanding of materials and their chemistry; which leads to rational design of high-performance organic-inorganic-hybrid materials for clean and renewable energy as well as low-energy-consumption electronic devices
There are no files associated with this item.
- Department of Energy Science and EngineeringCMMM Lab(Curious Minds Molecular Modeling Laboratory)1. Journal Articles
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.