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Adaptable Ultraviolet Refl ecting Polymeric Multilayer Coatings of High Refractive Index Contrast

AuthorsCastro-Smirnov, José R.; Ito, M.; Calvo, Mauricio E. ; López-López, Carmen ; Jiménez-Solano, Alberto ; Galisteo-López, J. F.; Zavala-Rivera, Paul; Tanaka, K.; Sivaniah, Easan; Míguez, Hernán
Issue Date2015
CitationAdvanced Optical Materials, 3:1633-1639 (2015)
AbstractA synthetic route is demonstrated to build purely polymeric nanostructured multilayer coatings, adaptable to arbitrary surfaces, and capable of effi ciently blocking by refl ection a targeted and tunable ultraviolet (UV) range. Refl ection properties are determined by optical interference between UV light beams refl ected at the interfaces between polystyrene layers of different porosity and hence refractive index. As no dopant absorber intervenes in the shielding effect, polymer degradation effects are prevented. Alternated porosity results from the modulation of photochemical effects at the few tens of nanometers length scale, combined with the collective osmotic shock induced during the processing of the precursor diblock copolymer fi lm. Experimental evidence of the application of this method to coat rough surfaces with smooth and conformal UV protecting fi lms is provided
Publisher version (URL)http://dx.doi.org/10.1002/adom.201500209
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