title: Microarrays formed by microfluidic spinning as multidimensional microreactors.
abstract: The exploration of methods allowing chemical reactions to be carried out at ultrasmall scales is of great scientific and technological interest. We report herein a microfluidic spinning technique for the fabrication of softened-polymer microarrays for use as multidimensional microreactors and the application of these microreactors in the synthesis of fluorescent nanocrystals. Highly aligned microarrays and controlled-angle grids were readily constructed from microfluidically spun polyvinylpyrrolidone (PVP) microfibers. One-zero dimensional (1D-0D), one-one dimensional (1D-1D), and one-two dimensional (1D-2D) microreactors were then produced by the intersections between microfibers and droplets, crossed microfibers, and microfibers and a PVP film, respectively; each component can be doped with different reagents. Specific examples show that these multidimensional microreactors enable the in situ generation of fluorescent nanocrystals without ligands within minutes.
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, 210009 (P.R. China).
authors.forename: Ling-Ling
authors.initials: LL
authors.lastname: Xu
authors.forename: Cai-Feng
authors.initials: CF
authors.lastname: Wang
authors.forename: Su
authors.initials: S
authors.lastname: Chen
keywords: microarrays; microfluidic spinning; microreactors; nanocrystals; polymer grids