Session 9: Conductors I
Controllable Fabrication of Transparent Touch Sensitive Device via Inkjet-Printing Polydopamine Nanoparticles on Flexible Substrate with Tunable Wetting Properties
Wednesday, June 21, 2017
11:30 AM - 11:50 AM
We report an inkjet-printing technique for the fabrication of highly resolved polydopamine (PDA) nanoparticle line arrays (NPLAs) with controllable line-to-line spacing via convective particle self-assembly on engineered substrate surfaces. The produced patterns can achieve minimum line width of 5μm and tunable line-to-line spacing ranging from 60 to 400μm. Conversion of the NPLAs into electrically conductive micro-wire arrays was achieved by a subsequent electroless metallization process, and a transparent capacitive touch sensing device based on the micro-wires was demonstrated. A theoretical model was also developed for investigating the growth mechanism of the NPLAs, and exhibited reasonably good agreement with our experimental observations. This model facilitates the oriented fabrication of micro-wire arrays for practical applications. This technique offers the advantages of low-cost and process versatility, and has been demonstrated to be compatible with the additive manufacturing of flexible electronics.
Mr. Liang Liu is now a Ph.D candidate and research assistant working with Prof. Timothy J. Singler in the Mechanical Engineering Department at Binghamton University. His research interests are focused on investigating the fundamental aspects of the functional materials patterns deposited via inkjet-printing technology, and exploring the structures of printed patterns for achieving desirable morphology and final functional properties in a controllable approach based upon inkjet deposition feedback.