title: Multiphoton writing of three-dimensional fluidic channels within a porous matrix.
abstract: We demonstrate a facile method for fabricating novel 3D microfluidic channels by using two-photon-activated chemistry to locally switch the interior surface of a porous host from a hydrophobic state to a hydrophilic state. The 3D structures can be infilled selectively with water and/or hydrophobic oil with a minimum feature size of only a few micrometers. We envision that this approach may enable the fabrication of complex microfluidic structures that cannot be easily formed via current technologies.
authors.affiliation: Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
authors.forename: Jyh-Tsung
authors.initials: JT
authors.lastname: Lee
authors.forename: Matthew C
authors.initials: MC
authors.lastname: George
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Moore
authors.forename: Paul V
authors.initials: PV
authors.lastname: Braun
mesh_terms: D004867:Equipment Design; D057927:Hydrophobic and Hydrophilic Interactions; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D055616:Microtechnology / Q000379:methods*; D010777:Photochemistry / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties
chemical_list: D011108:Polymers; D012822:Silicon Dioxide