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Keywords = fullerene nanowhisker

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9 pages, 7856 KiB  
Article
The Synthesis of C70 Fullerene Nanowhiskers Using the Evaporating Drop Method
by Sagdulla A. Bakhramov, Urol K. Makhmanov and Bobirjon A. Aslonov
Condens. Matter 2023, 8(3), 62; https://doi.org/10.3390/condmat8030062 - 24 Jul 2023
Cited by 3 | Viewed by 2357
Abstract
Semiconductor nanowhiskers, particularly nanostructured whiskers based on zero-dimensional (0D) C70 fullerene, are being actively discussed due to the great potential of their application in modern electronics. For the first time, we proposed and implemented a method for the synthesis of nanostructured C [...] Read more.
Semiconductor nanowhiskers, particularly nanostructured whiskers based on zero-dimensional (0D) C70 fullerene, are being actively discussed due to the great potential of their application in modern electronics. For the first time, we proposed and implemented a method for the synthesis of nanostructured C70 fullerene whiskers based on the self-organization of C70 molecules during the thermal evaporation of C70 droplets on the substrate surface. We found that the onset of the synthesis of C70 nanowhiskers upon the evaporation of drops of a C70 solution in toluene on the substrate surface depends on the substrate temperature. We have provided experimental evidence that an increase in both the C70 concentration in the initial drop and the substrate temperature leads to an increase in the geometric dimensions of C70 nanowhiskers. The obtained results provide useful vision on the role of solute concentration and substrate temperature in the synthesis of one-dimensional materials. Full article
(This article belongs to the Special Issue Physics of Light-Matter Coupling in Nanostructures)
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9 pages, 478 KiB  
Article
Superconducting Fullerene Nanowhiskers
by Hiroyuki Takeya, Kun’ichi Miyazawa, Ryoei Kato, Takatsugu Wakahara, Toshinori Ozaki, Hiroyuki Okazaki, Takahide Yamaguchi and Yoshihiko Takano
Molecules 2012, 17(5), 4851-4859; https://doi.org/10.3390/molecules17054851 - 26 Apr 2012
Cited by 36 | Viewed by 7900
Abstract
We synthesized superconducting fullerene nanowhiskers (C60NWs) by potassium (K) intercalation. They showed large superconducting volume fractions, as high as 80%. The superconducting transition temperature at 17 K was independent of the K content (x) in the range between 1.6 and 6.0 [...] Read more.
We synthesized superconducting fullerene nanowhiskers (C60NWs) by potassium (K) intercalation. They showed large superconducting volume fractions, as high as 80%. The superconducting transition temperature at 17 K was independent of the K content (x) in the range between 1.6 and 6.0 in K-doped C60 nanowhiskers (KxC60NWs), while the superconducting volume fractions changed with x. The highest shielding fraction of a full shielding volume was observed in the material of K3.3C60NW by heating at 200 °C. On the other hand, that of a K-doped fullerene (K-C60) crystal was less than 1%. We report the superconducting behaviors of our newly synthesized KxC60NWs in comparison to those of KxC60 crystals, which show superconductivity at 19 K in K3C60. The lattice structures are also discussed, based on the x-ray diffraction (XRD) analyses. Full article
(This article belongs to the Special Issue Fullerene Chemistry)
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8 pages, 575 KiB  
Article
Synthesis and Characterization of Fullerene Nanowhiskers by Liquid-Liquid Interfacial Precipitation: Influence of C60 Solubility
by Marappan Sathish and Kun’ichi Miyazawa
Molecules 2012, 17(4), 3858-3865; https://doi.org/10.3390/molecules17043858 - 29 Mar 2012
Cited by 45 | Viewed by 10101
Abstract
Fullerene nanowhiskers (FNWs) composed of C60 fullerene molecules were prepared using the liquid–liquid interfacial precipitation (LLIP) method in the carbon-disulfide (CS2) and isopropyl alcohol (IPA) system. The electron microscopic images reveal the formation of non-tubular FNWs. The X-ray diffraction (XRD) [...] Read more.
Fullerene nanowhiskers (FNWs) composed of C60 fullerene molecules were prepared using the liquid–liquid interfacial precipitation (LLIP) method in the carbon-disulfide (CS2) and isopropyl alcohol (IPA) system. The electron microscopic images reveal the formation of non-tubular FNWs. The X-ray diffraction (XRD) pattern studies indicate the presence of fcc crystalline structure and unusual triclinic structure in the FNWs. The selected area electron diffraction pattern (SAED) analysis demonstrates the existence of triclinic and electron beam assisted fcc to tetragonal crystalline phase transformation. The formation of triclinic structure might be validated due to the partial polymerization of FNWs at C60 saturated CS2-IPA interface. The high solubility of C60 in CS2 solvent system results in partial polymerization of FNWs. The polymerization of fullerene molecules in the FNWs has been further confirmed using Raman spectroscopy. Full article
(This article belongs to the Special Issue Fullerene Chemistry)
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