Abstract
Multi-walled carbon nanotubes (MWCNTs) have been proven effective for microwave absorption due to the high dielectric loss capacity; however, the influence of surface functional groups on the absorption efficiency still remains unknown. Herein, we investigated the microwave absorption properties of pristine MWCNTs, hydroxyl-containing MWCNTs and carboxyl-containing MWCNTs, evidencing the absorption efficiencies of > 33%, > 50% and > 45% at 8–18 GHz, respectively. Experimental characterizations reveal that the tunability of microwave absorption capacity is originated from the atomic symmetry breaking of surface structure for carbon nanotubes, leading to the differences of electric conductivity and dielectric loss capacity. The present study provides an insight into the structural origin of microwave absorption and has important significance to design microwave absorption materials by chemical surface engineering.
Sign-in/Register to access full text options 
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.
