United States. Researchers at Rensselaer Polytechnic Institute developed a new method to create a layer of golden nanoparticles measuring just millionths of a meter thick. These self-assembled gold coatings measuring less than 10 nanometers could have important implications for the manufacture of nanoelectronics.
Sang-Kee Eah, assistant professor in Rensselaer's department of physics, applied physics and astronomy, demonstrated how golden nanoparticles are assembled within a single uniform patent called a superlattice.
The professor observed a superlattice measurement of 20 microns, with a distance between lines of nanoparticles of 8.8 nanometers. He says the mastery of 20-micron superlattices is the longest previously documented and that this new technique could result in larger superlattices with even smaller features.
To create the nanolayer, the scientist fused liquid toluene – a common industrial solvent – with golden nanoparticles. These form a flat, closed golden monolayer on the surface of the liquid in contact with air. By moving the monolayer of golden nanoparticles to another air-water surface, the extensive superlattice forms and coats a silicone wafer after the toluene and water evaporate.
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