title: Light-driven wettability changes on a photoresponsive electrospun mat.
abstract: Novel nanofibers of biodegradable polycaprolactone (PCL) modified with light-responsive azobenzene were prepared by electrospinning upon a facile one-pot reaction. The surface chemistry of the nanofibers was probed by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). Both XPS and ToF-SIMS spectra proved the successful conjugation of azobenzene with PCL. ToF-SIMS not only enabled chemical mapping but also provided morphology information, supplementary to scanning electron microscopy (SEM). The large, reversible, and light-responsive wettability changes of the functional fibrous surfaces were further demonstrated using UV-vis spectroscopy and contact angle (CA) measurements.
authors.affiliation: Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark. menglin@inano.au.dk
authors.forename: Menglin
authors.initials: M
authors.lastname: Chen
authors.forename: Flemming
authors.initials: F
authors.lastname: Besenbacher
mesh_terms: D001391:Azo Compounds / Q000737:chemistry; D001577:Benzophenones / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D008027:Light; D057139:Nanofibers / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D011091:Polyesters / Q000737:chemistry; D017155:Wettability
chemical_list: D001391:Azo Compounds; D001577:Benzophenones; D020099:Coated Materials, Biocompatible; D011091:Polyesters; C016240:polycaprolactone; C047723:benzophenone; C009850:azobenzene