Synthesis and evaluation of artificial dielectrics consisting of metal nanoparticles

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Mercaptosuccinic acid monolayer protected gold nanoparticles were self-assembled into single crystal arrangements at aqueous solution surfaces. The permittivity of the nanoparticle lattices was varied between 5 and 11 by altering the component nanoparticle size. Randomly packed gold nanoparticle films showed the conductivities between 3.0 and 500 S/cm, and their temperature coefficients were 1.2×10^<-4> K^<-1>, which was one order of magnitude smaller than that of bulk gold. These materials are potentially useful for electronic applications such as ballast resistances, which suppress thermal runaway of electronic devices, and gate materials for increasing device density.