High-pressure studies of Nano/sub-micrometer C70 rods

• We have successfully synthesized C-70 rods in nano/sub-micrometers scale by evaporating solvent method. The diameter of the as grown C-70 rods is similar to 500 nm, and the length is similar to 10 mu m. The EDXD pattern and Raman spectroscopy for as -grown sample indicate that the as grown C-70 rod is in hcp structure. The pressure-induced structural phase transition has been studied by using DAC combined with EDXD and Raman spectroscopy methods under quasi-hydrostatic pressure up to 26.1GPa. It is found that hcp structure transforms into amorphous phase for C-70 rods in the pressure range from 23.3 to 26.1GPa, which is higher than the transformation pressure for bulk C-70 crystals. The phase transition is irreversible and it is induced by the collapse of C-70 cage.

Nyckelord

Fullerenes

C70

nanoparticles

Raman spectroscopy

electron diffraction

high pressure

NATURAL SCIENCES Physics Condensed matter physics

NATURVETENSKAP Fysik Kondenserade materiens fysik

Publikations- och innehållstyp

art (ämneskategori)

ref (ämneskategori)