Observation of regular arrangement of twin-grains in C/sub 2/H/sub 4//SiH/sub 4//Ar rf plasma

Summary form only given. An important concern is the attraction between charge particulates in Coulomb crystal existing in a strongly coupled dusty plasma. Furthermore, the assumption on formation of dust molecule as a first step to super-chemistry was presented. We report the first direct observation of twin-grains (a possible molecule-like state, which means two or more dust grains stuck together, e.g. triplet etc.) with a regular arrangement using an optical microimaging system in a rf plasma.