Abstract: The present invention relates to a substrate having an organic metal complex bonded on the surface thereof, which is prepared by the vapor deposition of a sulfur atom onto a substrate followed by bonding of an organic metal complex such as tetrakis-triphenylphosphine palladium [Pd(PPh3)4] to the surface of the substrate; a substrate bonded transition metal catalyst using said substrate; and a method for the preparation thereof. The above substrate and metal catalyst allow the solution of some problems with respect to the safety and stability of an organic metal complex in its use, the removal of trace amounts of metals in a reaction product, waste water treatment and the like.

Abstract: The present invention probides a novel method for fabricating a semiconductor super-atom and an aggregate thereof, which allows the formation of a semiconductor nano-structure with a diameter in the order of 10 nm, which is meant for constituting a core, and allows the doping of impurity atoms only to the core portion with the number of the impurity atoms being controlled.

Abstract: A STM drive mechanism capable of moving a scanning tunneling microscope (STM) incorporated with a molecular beam epitaxy (MBE) device in the MBE device under vacuum and a substrate holder with a wide clearance formed between a substrate heating system and the substrate holder are provided. The STM is protected by a heat insulating shield from high vapor pressure atmosphere and radiant heat according to substrate heating.

Abstract: In a speaker which comprises a diaphragm having a vibrating portion and an annular conductive portion, a current feeding coil facing the conductive portion with a predetermined gap therebetween, and a magnetic circuit including a top plate, a magnet and a yoke plate to which the current feeding coil is attached; the diaphragm is formed so that an electrical resistance of its conductive portion is lower than an electrical resistance of its vibrating portion.