화학공학소재연구정보센터
Journal of Chemical Physics, Vol.114, No.23, 10457-10463, 2001
Grazing incidence scattering of hyperthermal C-60(+), C-76(+), and C-84(+) from graphite: Electron transfer dynamics
Hyperthermal grazing. incidence scattering (E-coll = 500-700 eV, theta (in)= 80 degrees) of fullerenes C-60(+) C-76(+). and C-84(+) from highly oriented pyrolytic graphite surfaces is associated with efficient one and two electron transfer to yield parent neutrals and anions-in addition to parent cations. We report lower limits to nascent anion yields under conditions for which collisional heating is kept relatively small. Largest anion yields were observed for C-84, which also has the largest electron affinity of the projectiles probed. Here >3% of the particles scattered upon 11500 ms(-1) collision survive detection as anions. This can be qualitatively understood in terms of a resonant electron transfer mechanism and a simple kinetic scheme.