[ACS Appl. Mater. Interfaces] Direct writing of microfluidic footpaths by pyro-EHD printing
A direct writing method for fabricating microfluidic footpaths by pyro-Electrohydrodynamic (EHD) jet printing is reported. Here we propose the use of a nozzle-free 3D printing technique for the fabrication of printed structures that can be embedded in a variety of soft, transparent, flexible and biocompatible polymers, and thus easily integrated into lab-on-chip (LOC) devices. We prove the advantage of the high resolution and flexibility of pyro-EHD printing for the realization of microfluidic channels well below the standard limit in dimension of conventional ink-jet printing technique and simply adaptable to the final user desires in terms of geometry and materials. Starting from the description of the innovative approach proposed for the channel fabrication, we demonstrate the design, fabrication and proof of a microfluidic matrix of interconnected channels. The method described here could be a breakthrough technology for the fabrication of in situ implantable, stretchable and biocompatible devices opening new routes in the field of biomedical engineering and wearable electronics.
Sara Coppola, Giuseppe Nasti, Michele Todino, Federico Olivieri, Veronica Vespini, and Pietro Ferraro ACS Appl. Mater. Interfaces, Just Accepted Manuscript DOI: 10.1021/acsami.7b02633 Publication Date (Web): April 27, 2017 Copyright © 2017 American Chemical Society