title: Superamphiphobic Silicon-Nanowire-Embedded Microsystem and In-Contact Flow Performance of Gas and Liquid Streams.
abstract: Gas and liquid streams are invariably separated either by a solid wall or by a membrane for heat or mass transfer between the gas and liquid streams. Without the separating wall, the gas phase is present as bubbles in liquid or, in a microsystem, as gas plugs between slugs of liquid. Continuous and direct contact between the two moving streams of gas and liquid is quite an efficient way of achieving heat or mass transfer between the two phases. Here, we report a silicon nanowire built-in microsystem in which a liquid stream flows in contact with an underlying gas stream. The upper liquid stream does not penetrate into the lower gas stream due to the superamphiphobic nature of the silicon nanowires built into the bottom wall, thereby preserving the integrity of continuous gas and liquid streams, although they are flowing in contact. Due to the superamphiphobic nature of silicon nanowires, the microsystem provides the best possible interfacial mass transfer known to date between flowing gas and liquid phases, which can achieve excellent chemical performance in two-phase organic syntheses.
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , Nam-gu, Pohang-si, Gyungsangbuk-do 37673, South Korea.
authors.forename: Dong-Hyeon
authors.initials: DH
authors.lastname: Ko
authors.affiliation: Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology , Changsha 410073, Hunan Province, People's Republic of China.
authors.forename: Wurong
authors.initials: W
authors.lastname: Ren
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , Nam-gu, Pohang-si, Gyungsangbuk-do 37673, South Korea.
authors.forename: Jin-Oh
authors.initials: JO
authors.lastname: Kim
authors.affiliation: Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology , Changsha 410073, Hunan Province, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.affiliation: Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology , Changsha 410073, Hunan Province, People's Republic of China.
authors.forename: Hao
authors.initials: H
authors.lastname: Wang
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , Nam-gu, Pohang-si, Gyungsangbuk-do 37673, South Korea.
authors.forename: Siddharth
authors.initials: S
authors.lastname: Sharma
authors.affiliation: Sorbonne Universités , UPMC Univ Paris 06, CNRS, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005 Paris, France.
authors.forename: Marco
authors.initials: M
authors.lastname: Faustini
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , Nam-gu, Pohang-si, Gyungsangbuk-do 37673, South Korea.
authors.forename: Dong-Pyo
authors.initials: DP
authors.lastname: Kim
keywords: cone-shaped silicon nanowire clusters; gas−liquid binary process; in-contact flow microsystem; superamphiphobicity