AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Multi-directional 3D Assembly with Charged Nano-aerosol
YONGJUN BAE, Hyesung Cho, Mansoo Choi, Seoul National University
Abstract Number: 93 Working Group: Nanoparticles and Materials Synthesis
Abstract Even though a host of nanotechnologies has been developed, the approach to assemble the nanoparticles into the proper structure networks remains largely elusive. In this research, we present a method to fabricate the multi-furcated nanoparticle assemblies via aerosol technology. We successfully demonstrate the position control of charged particles (in terms of the growth direction) as a function of the electric field influenced by the hole pattern arrangement on the silicon substrate. Based on the effects of the alignment angles and distances between patterns, we designed diverse types of hole arrangement for guiding charged nanoparticles to the three dimensional and multi-directional assembly. Electrostatic calculations show the electrical trap limiting the movement of charged particles around the hole and inducing the multi-directional structure by electric field superposition. In accordance with the growth time, interconnections between neighboring structures were precisely controlled and electrical characteristics were measured to check the growth state and the formation of the electric network. As an application, multi-furcated bridge structures connecting the separated electrodes were prepared by copper nanoparticle assembly and applied to the metal oxide semiconductor gas sensor showing the enhanced sensitivity (S = 1.6 at CO 100 ppm) compared to nanoparticle film shaped gas sensor (S = 0.5 at CO 100 ppm).