A structure having a cavity or enclosed space is fabricated by forming a recessed region in a surface of a substrate, and providing a first layer adjacent the recessed region. The end of the pin andor the locking disc may also include an insulating material to further reduce any remaining noise made when the metal pin makes when contacting the metal locking disc. Compositions are provided that can include: a substrate; and a mixture over the substrate, the mixture comprising one or more of: latex polymer; antifoam; surfactant; plasticizer; ether; fungicide; glycol; liquid stabilizer; and antioxidant. As such, the present invention is particularly suited for the fabrication of SRAM memory devices. In one embodiment, the nanoparticulate carvedilol composition has an effective average particle size of less than about 2000 nm.