ABSTRACT
Silicon subiodide clusters (Si(n)I(m), n = 1-20) produced by laser ablation of bulk powder silicone tetraiodide have been investigated by time-of-flight mass spectroscopy and ab initio calculations. Both experimental results and theoretical calculations revealed a tendency to form different structures of the clusters depending on n: chain, ring, and cage structures for n < or = 6, 6 < n < 16, and n > or = 16, respectively. The results showed that iodine, like hydrogen, can be used for stable silicon cluster termination.
Subject(s)
Crystallization/methods , Iodine/chemistry , Models, Chemical , Nanostructures/chemistry , Nanostructures/ultrastructure , Nanotechnology/methods , Silicon/chemistry , Computer Simulation , Macromolecular Substances/chemistry , Materials Testing , Models, Molecular , Molecular Conformation , Particle Size , Surface PropertiesABSTRACT
The observation of slow-wave sustained (SW) discharge in a whistler- or helicon-wave range of frequency is made using high-frequency and very-high-frequency bands of rf. The SW discharge occurs at an extremely low rf power and plasma density, which are lower than a capacitive-coupling discharge region.
