Structural, mechanical, and electrical properties of high-pressure sintered C60 nanowhiskers and C60 powder

Jun-ichi Minato; Kun'ichi Miyazawa; Hisao Kanda; Minoru Akaishi

doi:10.1117/12.582237

16 February 2004 Structural, mechanical, and electrical properties of high-pressure sintered C₆₀ nanowhiskers and C₆₀ powder

Jun-ichi Minato, Kun'ichi Miyazawa, Hisao Kanda, Minoru Akaishi

Author Affiliations +

Proceedings Volume 5648, Smart Materials III; (2004) https://doi.org/10.1117/12.582237
Event: Smart Materials, Nano-, and Micro-Smart Systems, 2004, Sydney, Australia

Abstract

C₆₀ nanowhiskers fabricated by the liquid-liquid interfacial precipitation method were sintered at 800 °C under 5.5 GPa for 2 h. Structural, mechanical, and electrical properties of sintered C₆₀ nanowhiskers were compared with those of sintered pristine C₆₀ powder under the same conditions. Sintered C₆₀ nanowhiskers showed a relatively high density and a fine texture as compared to sintered pristine C₆₀ powder probably due to the fibrous morphology of starting C₆₀ nanowhiskers. Analysis using four-probe micro manipulator system (SUNYOU, MMS0024-01) revealed low electrical resistivity for the sintered samples. Electrical resistivity of sintered C₆₀ nanowhisker was slightly higher than that of sintered pristine C₆₀ powder. Both of the sintered samples showed high micro-Vickers hardness about 1100 HV. XRD patterns of the sintered samples showed only diffuse peaks that are characteristic of glassy carbon. The peak intensity of glassy carbon in the sintered C₆₀ nanowhiskers was weaker than that of sintered pristine C₆₀ powder, which was consistent with the different electrical resistivity. Characterization by FTIR and Raman spectroscopy confirmed no sign of C₆₀ molecules for both the sintered samples indicating that C₆₀ molecules were significantly reduced by the high temperature and high pressure treatment. The differences of textural and electrical properties between sintered C₆₀ nanowhiskers and sintered pristine C₆₀ powder suggest a good sinterability of the C₆₀ nanowhiskers due to their fibrous morphology as compared with pristine C₆₀ powder.

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Jun-ichi Minato, Kun'ichi Miyazawa, Hisao Kanda, and Minoru Akaishi "Structural, mechanical, and electrical properties of high-pressure sintered C₆₀ nanowhiskers and C₆₀ powder", Proc. SPIE 5648, Smart Materials III, (16 February 2004); https://doi.org/10.1117/12.582237

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KEYWORDS

Molecules

Polishing

Surface finishing

Carbon

Crystals

Fullerenes

Raman spectroscopy

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