Abstract
CO 2 absorption mechanism in sheets of graphene layers prepared by thermal exfoliation of graphene oxide was investigated using surface acoustic waves. In this experiment, LiNbO 3 SAW delay-line device was spray coated with graphene flakes. The transmission at SAW frequencies was attenuated by more than 12.7 dB due to deposition of graphene. A maximum phase change ∼34 degrees was observed as the CO 2 pressure inside the chamber increased from 0.01 Torr to 700 Torr, which is at least 10 times than the phase shift observed on free surface of LiNbO 3 under similar conditions. Transient measurements on the graphene-coated sample indicate a phase change of 4 degree because of 0.43 mg/cm3 of CO 2 absorption and subsequent full recovery after 20 min of CO 2 purging.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
