- AMER PHYSICAL SOC
The tubulization process of amorphous carbon nanopillars was observed in situ by transmission electron microscopy. Amorphous carbon nanopillars were transformed into graphitic tubules by annealing at 650-900 degreesC in the presence of iron nanoparticles. A molten catalyst nanoparticle penetrated an amorphous carbon nanopillar, dissolving it, and leaving a graphite track behind. An iron nanoparticle moved with its shape changing like an earthworm. We concluded that the tubulization mechanism is a solid-(quasiliquid)-solid mechanism where the carbon phase transformation is a kind of liquid phase graphitization of amorphous carbon catalyzed by liquefied metal-carbon alloy nanoparticles.
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- DOI : 10.1103/PhysRevLett.92.215702
- ISSN : 0031-9007
- eISSN : 1079-7114
- Web of Science ID : WOS:000221713300029