Molecular Crystals and Liquid Crystals, Vol.646, No.1, 26-30, 2017
Modified coffee rings for 1-D electronics: Size considerations
We study modified coffee rings formed by different size nanowires as the solute where they are dispersed evaporates for their applications for 1D, anisotropic conductivity. Nanocellulose nanowires 5nm in diameter and 5m in length in water and silver nanowires (AgNWs) 135 +/- 15nm in diameter and 35 +/- 15m in length in isopropyl alcohol are deposited on photolithographed gratings of varying depth (0.5, 0.35 and 0.25m) with a width of 10m. The deposition results in a modified coffee ring that has a structure whose resulting phase varies as a function of the nanowire concentration and the depth of the grating. We find that there is a dependence on the length of the NWs on the flow velocity.