Abstract: The present invention discloses the doping of rare earth elements into porous silicon, resulting in enhancement of luminescence. The doping is an electro-chemical process using constant voltage bias across the two electrodes in which the anode is porous silicon and the cathode is platinum. The doping process involves a well-defined solution of electrolytes that controls the conductivity of the solution, and set values of constant voltages that selectively allow the desired rare earth elements being doped into porous silicon.

Abstract: The present invention is for a flexible device attachable to the underside of theater seats, allowing for the storage of personal items. The invention comprises an expandable storage structure, having a bottom section, a top section, a front section, a back section, and side sections, the side sections positioned between the top section and the bottom section and the front section and the back section, said expandable structure having an elasticized opening at the top section, and at least one strap attached to each of the two sides of the expandable structure with each distal end of said at least one strap having a closure mechanism, which is complementary with the other said closure mechanism, thereby allowing the distal ends of said straps to be removably connected.