Spontaneous ordering of bimodal ensembles of nanoscopic gold clusters

Article Abstract:

There have been developments in the preparation of ordered metal and semiconductor nanocrystal ensembles over the past few years, such as the crystallization of monodisperse fractions of thiol-stabilized nanoparticles into two and three dimensional superlattices. Three types of organization were observed in alkanethiol-derivatized gold nanocrystals, size-segregated areas, structures where different sized particles are located in random positions in a pseudohexagonal lattice and intimately mixed different sized particles.

United States, Observations, Particles, Particulate matter, Gold, Nanoparticles

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Hard elastic carbon thin films from linking of carbon nanoparticles

Article Abstract:

Hard elastic thin films of pure carbon can be manufactured using nanotechnology. The process involves the high velocity deposition of closed, hollow graphitic carbon nanoparticles such as nanotubes and carbon onions onto a substrate. The process causes sp3-like bonds to bind together the sp2-bonded graphitic planes. During the bonding process, a substantial electron-energy-loss occurs in the sp2 bonding located in the intersecting regions of the nanoparticles.

Nanotechnology, Thin films, Sealing (Technology), Sealing (Process)

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Ultra-low-threshold field emission from conjugated polymers

Article Abstract:

Field-emission displays contain electron emitting materials, and such devices currently use arrays of microfabricated tips as the emitting cathodes. However a thin-film cathode is potentially cheaper and simpler alternative. It requires materials that can emit sufficient electron current at low applied fields. Some conducting polymers have low electron affinity, wide bandgap and good transport properties, and are demonstrated to provide good cathode materials.

Polymers, Field emission cathodes

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