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http://hdl.handle.net/10397/4854
Title: | Formation of sp³ bonding in nanoindented carbon nanotubes and graphite | Authors: | Guo, W Zhu, CZ Yu, TX Woo, CH Zhang, B Dai, YT |
Issue Date: | 10-Dec-2004 | Source: | Physical review letters, 10 Dec. 2004, v. 93, no. 24, 245502, p. 1-4 | Abstract: | Nanoindentation-induced interlayer bond switching and phase transformation in carbon nanotubes (CNTs) and graphite are simulated by molecular dynamics. Both graphite and CNTs experience a soft-to-hard phase transformation at room temperature at compressive stresses of 12 and 16 GPa, respectively. Further penetration leads to the formation of interlayer sp³ bonds, which are reversible upon unloading if the compressive stress is under about 70 GPa, beyond which permanent interlayer sp³ bonds form. During nanoindentation, the maximum nanohardness of graphite can reach 109 GPa, and CNTs 120 GPa, which is comparable to that of diamond. | Keywords: | Bonding Boundary conditions Carbon nanotubes Compressive strength Compressive stress Diamonds Electric resistance Graphite Hardness Indentation Molecular dynamics Phase transitions Pressure effects Raman scattering Single crystals |
Publisher: | American Physical Society | Journal: | Physical review letters | ISSN: | 0031-9007 | EISSN: | 1079-7114 | DOI: | 10.1103/PhysRevLett.93.245502 | Rights: | Physical Review Letters © 2004 The American Physical Society. The Journal's web site is located at http://prl.aps.org/ |
Appears in Collections: | Journal/Magazine Article |
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Guo_Nanoindented_Carbon_Nanotubes.pdf | 304.59 kB | Adobe PDF | View/Open |
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