Author/Authors :
Meletov، نويسنده , , K.P. and Davydov، نويسنده , , V.A. and Rakhmanina، نويسنده , , A.V and Agafonov، نويسنده , , V. and Arvanitidis، نويسنده , , J. and Christofilos، نويسنده , , D. and Andrikopoulos، نويسنده , , K.S. and Kourouklis، نويسنده , , G.A.، نويسنده ,
Abstract :
The photopolymerization of the orthorhombic C60 polymer has been studied by Raman spectroscopy as a function of laser intensity at ambient and high pressure conditions. The Raman spectra at ambient pressure, excited by 514.5 nm, show irreversible changes at intensity ∼3200 W/cm2, while at high pressure the transformation rate increases and the required intensity drops to ∼470 W/cm2. Raman spectra recorded after pressure release, indicate that non-irradiated sample sites do not exhibit any changes. In addition, ambient pressure X-ray diffraction measurements on high-pressure treated, non-irradiated samples show no structural modification, revealing the dominant role of light in the polymerization processes.
