High structural stability of single wall carbon nanotube under quasi-hydrostatic high pressures

作者：Chen Jing Yin; Kim Minseob; Yoo Choong Shik^*

来源：Chemical Physics Letters, 2009, 479(1-3): 91-94.

DOI：10.1016/j.cplett.2009.07.096

In quasi-hydrostatic conditions, single wall carbon nanotubes (SWNTs) exhibit high structural stability to similar to 35 GPa, well beyond the stability of sp(2) C=C bonds in graphite, carbon fullerenes, benzene, and other hydrocarbons. The pressure-induced Raman changes of SWNT are completely reversible below 16 GPa, partially reversible between 16 and 35 GPa, and irreversible beyond 35 GPa where it turns into highly disordered graphite. We explain the high stability in terms of the pressure-induced structural modi. cation to an interlinked configuration, which occurs reversibly under substantial sp(3) hybridization (similar to 20%) and, thus, increases the stability of sp(2) C=C bonds in the SWNTs.

• 出版日期2009-9-7