title: Oil-in-water microfluidics on the colloidal scale: new routes to self-assembly and glassy packings.
abstract: We have developed norland optical adhesive (NOA) flow focusing devices, making use of the excellent solvent compatibility and surface properties of NOA to generate micron scale oil-in-water emulsions with polydispersities as low as 5%. While current work on microfluidic oil-in-water emulsification largely concerns the production of droplets with sizes on the order of 10s of micrometres, large enough that Brownian motion is negligible, our NOA devices can produce droplets with radii ranging from 2 μm to 12 μm. To demonstrate the utility of these emulsions as colloidal model systems we produce fluorescently labelled polydimethylsiloxane droplets suitable for particle resolved studies with confocal microscopy. We analyse the structure of the resulting emulsion in 3D using coordinate tracking and the topological cluster classification and reveal a new mono-disperse thermal system.
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK. M.Meissner@Bristol.ac.uk and Centre for Nanoscience and Quantum Information, Tyndall Avenue, Bristol, BS8 1FD, UK.
authors.forename: Max
authors.identifier: http://orcid.org/0000-0002-6720-1830
authors.initials: M
authors.lastname: Meissner
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK. M.Meissner@Bristol.ac.uk and Centre for Nanoscience and Quantum Information, Tyndall Avenue, Bristol, BS8 1FD, UK.
authors.forename: Jun
authors.initials: J
authors.lastname: Dong
authors.affiliation: Mathematics Department, University of Bristol, BS8 1TW, Bristol, UK.
authors.forename: Jens
authors.initials: J
authors.lastname: Eggers
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK. M.Meissner@Bristol.ac.uk and Centre for Nanoscience and Quantum Information, Tyndall Avenue, Bristol, BS8 1FD, UK and Bristol Centre for Functional Nanomaterials, University of Bristol, Bristol, BS8 1TL, UK.
authors.forename: Annela M
authors.initials: AM
authors.lastname: Seddon
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK. M.Meissner@Bristol.ac.uk and Centre for Nanoscience and Quantum Information, Tyndall Avenue, Bristol, BS8 1FD, UK and Chemistry Department, University of Bristol, Bristol, BS8 1TS, UK and Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: C Patrick
authors.initials: CP
authors.lastname: Royall