Investigation of microwave absorption properties of multiwalled nanotube buckypaper filled with cobalt nanoparticles. (May 2014)

• Record Type: Journal Article
• Authors: Liu, J.-H.; Saravanan, L.; Miao, H.-Y.; Wang, L.-C.
• Is Part Of: Materials research innovations. Volume 18(2014)Supplement 3
• Page Start: S7
• Page End: S11
• Publication Date: 2014-05
• Subjects: MWCNTs -- Buckypaper -- Cobalt filling -- Resistivity -- Transmission coefficient -- Microwave absorption; Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891714Z.000000000590
• Languages: English
• ISSNs: 1432-8917

Abstract

Abstract : The paper demonstrates the filling of cobalt nanoparticles into the multiwalled carbon nanotube buckypaper by the dispersion and filtration method to study microwave absorption. Synthesised buckypaper samples were subject to characterisation by using X-ray diffraction, scanning electron microscope, atomic force microscope and four probe techniques to measure the size of the cobalt particles, morphology and low temperature electrical resistivity of the buckypaper, respectively. We used two different sizes of cobalt particles (14·54 and 33·04 nm, respectively) for doping in the buckypaper. Microwave-absorbing properties were examined by measuring the transmission coefficient (S21 ) in a frequency range of 1–20 GHz with the buckypaper as an absorber. Variations in the resistivity value, with different particle sizes of cobalt were attained by the low temperature resistivity measurements. The observed maximum of S21 indicates that the cobalt–buckypaper displays good microwave absorption (90%) properties for a potential application as wideband electromagnetic wave absorbers.