Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Steady-state stability improvement of reduced graphene oxide thermo behavior via polymer film encapsulation

Authors
Jung, H.Kim, H.-K.Park, J.Lee, H.
Issue Date
Jan-2022
Publisher
Elsevier Ltd
Keywords
Encapsulation; Graphene oxide; Reduced graphene oxide; Temperature sensor; Thermoacoustic speaker
Citation
Diamond and Related Materials, v.121
Journal Title
Diamond and Related Materials
Volume
121
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/151371
DOI
10.1016/j.diamond.2021.108792
ISSN
0925-9635
Abstract
We report steady-state stability improvement of reduced graphene oxide (rGO) thermo behavior via polyimide (PI) film encapsulation. A temperature sensor was made of rGO produced by photo-thermal laser irradiation of graphene oxide (GO) and showed a negative thermal coefficient of resistance (TCR). However, when the rGO-based temperature sensor was exposed to air, the resistance increased owing to the attachment of an oxygen-containing molecule, particularly water molecules on the surface of the rGO. To solve this issue, the surface of rGO was encapsulated with a PI film, and the encapsulated temperature sensor showed significant stable resistance characteristics at 25 °C and 40% relative humidity for seven days compared to bare rGO while retaining the sensitivity of the sensor. Scanning electron microscopy images confirmed that most of the rGO surface was separated from the encapsulated PI layer, and the morphology of the rGO surface remained intact, thus maintaining the temperature variation properties without being affected by external humidity. In addition, the PI-encapsulated rGO produced a thermoacoustic sound of 78 dB at 5 kHz performance after 30 days. © 2021
Files in This Item
There are no files associated with this item.
Appears in
Collections
ICT융합공학부 > 전자공학전공 > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Lee, Hyun Koo photo

Lee, Hyun Koo
ICT융합공학부 (전자공학전공)
Read more

Altmetrics

Total Views & Downloads

BROWSE