2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 5. Marquis Intl. Symp. / New and Advanced Materials and Technologies
| Editors: | Kongoli F, Marquis F, Chikhradze N |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2017 |
| Pages: | 590 pages |
| ISBN: | 978-1-987820-69-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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High-Resolution Transmission Electron Microscopy Characterization of Hexagonal C60 Fullerene Nanowhiskers
Kunichi Miyazawa1; Yumi Tanaka1; Yoshihiro Nemoto2; Takatsugu Wakahara2; Konno Toshio2;1TOKYO UNIVERSITY OF SCIENCE, Tokyo, Japan; 2NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba, Japan;
Type of Paper: Regular
Id Paper: 174
Topic: 43
Abstract:
C60 fullerene nanowhiskers (C60FNWs) are thin needle-like crystals composed of C60 molecules. Up to now, a wide range of energy, electronics, medical and environmental application studies of C60FNWs have been performed for transistors, solar cells, superconductors, chemical sensors, scaffolds for cell growth, amino acid adsorbents and so forth. One of the important characteristics of C60FNWs is that they can be easily synthesized in solution using a liquid-liquid interfacial precipitation (LLIP) method. C60FNWs have two crystal structures of face-centered cubic (fcc) structure and hexagonal close-packed (hcp) structure. The fcc C60FNWs can be abundantly synthesized. However, since the yield of hexagonal close-packed C60FNWs (h-C60FNWs) synthesized by the LLIP method is very small, the microstructural characterization of h-C60FNWs has not been performed as yet. Hence, the microstructure of h-C60FNWs synthesized by the LLIP method were minutely investigated by high-resolution transmission electron microscopy (HRTEM). In addition to the HRTEM characterization of h-C60FNWs, the polymerization of C60FNWs by Raman laser beam was studied. A Raman laser-irradiated h-C60FNW exhibited a polycrystalline structure with smaller intermolecular distances of C60 than that of a pristine h-C60FNW without the laser irradiation. The spectra of electron energy loss spectrometry for the laser-irradiated h-C60FNW showed broadened pi* bands. Through the Raman spectroscopy measurements and HRTEM observations, it is concluded that C60 oligomers, which are smaller than pentamers, were primarily formed by the laser irradiation.
Keywords:
Nanomaterials; New and advanced materials;References:
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