Remarkable Improvement In Microwave Absorption By Cloaking A Micro-Scaled Tetrapod Hollow With Helical Carbon Nanofibers

Abstract

Helical nanofibers are prepared through in situ growth on the surface of a tetrapod-shaped ZnO whisker (T-ZnO), by employing a precursor decomposition method then adding substrate. After heat treatment at 900°C under argon, this new composite material, named helical nanofiber-T-ZnO, undergoes a significant change in morphology and structure. The T-ZnO transforms from a solid tetrapod ZnO to a micro-scaled tetrapod hollow carbon film by reduction of the organic fiber at 900°C. Besides, helical carbon nanofibers, generated from the carbonization of helical nanofibers, maintain the helical morphology. Interestingly, HCNFs with the T-hollow exhibit remarkable improvement in electromagnetic wave loss compared with the pure helical nanofibers. The enhanced loss ability may arise from the efficient dielectric friction, interface effect in the complex nanostructures and the micro-scaled tetrapod-hollow structure.

Publication Date

2-7-2015

Publication Title

Physical Chemistry Chemical Physics

Volume

17

Issue

5

Number of Pages

3024-3031

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1039/c4cp04849k

Socpus ID

84921670106 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84921670106

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