title: Control of Polymer Phase Separation by Roughness Transfer Printing for 2D Microlens Arrays.
abstract: Great efforts have been devoted to the control of phase separation between blended polymers in terms of the advantages for engineering functional topologies. A simple and straightforward pathway through roughness transfer printing (RTP) is proposed to realize the control of polymer phase separation. The additional roughness difference, which is introduced by trace agarose transferred from a hydrogel stamp, offers a great effect on the rate of nucleation and coalescence orientation of polymethylmethacrylate (PMMA) protrusions grown from a polydimethylsiloxane (PDMS) network. Using a particular topography of agarose stamp and a proper growth time in toluene atmosphere, a 2D microlens array with high uniformity is obtained that shows great potential for optical applications. Moreover, the control of polymer phase separation was successfully extended to the collection and identification of fingerprints with a high degree of replication.
authors.affiliation: Department of Chemistry, Renmin University of China, Beijing, 100872, P. R. China.
authors.forename: Xinyue
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Renmin University of China, Beijing, 100872, P. R. China.
authors.forename: Naiwei
authors.initials: N
authors.lastname: Gao
authors.affiliation: Department of Chemistry, Renmin University of China, Beijing, 100872, P. R. China.
authors.forename: Yonglin
authors.initials: Y
authors.lastname: He
authors.affiliation: Department of Chemistry, Renmin University of China, Beijing, 100872, P. R. China.
authors.forename: Shenglong
authors.initials: S
authors.lastname: Liao
authors.affiliation: Department of Chemistry, Renmin University of China, Beijing, 100872, P. R. China.
authors.forename: Shiming
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Renmin University of China, Beijing, 100872, P. R. China.
authors.forename: Yapei
authors.initials: Y
authors.lastname: Wang
keywords: 2D structures; anisotropic wettability; microlens arrays; separation processes