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Title

Gecko-like branched polymeric nanostructures from nanoporous templates

AuthorsBlaszczyk-Lezak, Iwona; Juanes, Diana; Martín, Jaime; Mijangos, Carmen
Issue Date2018
PublisherAmerican Chemical Society
CitationLangmuir 34(38): 11449-11453 (2018)
AbstractHere, we report a simple method to produce hierarchically shaped polymeric one-dimensional nanostructures. More specifically, dual-sized polymer nanowires are fabricated employing multibranched anodic aluminum oxide templates. By fine selection of the anodization conditions, we achieve branched nanopores having a first segment of 400 nm in diameter from which seven further 55 nm in diameter pores arise. Wetting of such nanopores with polymer melts - for example, poly(μ-caprolactone) and polystyrene - allows for the nanomolding of their respective inverse nanostructures, that is, dual-sized multibranched polymer nanowires that, when supported on a flat surface, strongly resemble the spatulae of geckos' toes. The structural features of the dual-sized polymer nanostructures, namely, crystalline phase, crystallinity, texture, and so on, are furthermore characterized and interpreted within the context of polymer phase transitions in confined media. Our work presents a readily applicable approach to produce soft nanomaterials of high morphological complexity, thereby with promising implications in the nanotechnology area, for example, in biomimetic solid adhesion.
Publisher version (URL)http://dx.doi.org/10.1021/acs.langmuir.8b01923
URIhttp://hdl.handle.net/10261/176048
Identifiersdoi: 10.1021/acs.langmuir.8b01923
issn: 0743-7463
e-issn: 1520-5827
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