title: Phosphorescent Oxygen and Mechanosensitive Nanostructured Materials Based on Hard Elastic Polypropylene Films.
abstract: It is well known that sensitivity of quenched-phosphorescence O2sensors can be tuned by changing the nature of indicator dye and host polymer acting as encapsulation and quenching mediums. Here, we describe a new type of sensor materials based on nanostructured hard elastic polymeric substrates. With the example of hard elastic polypropylene films impregnated with Pt-benzoporphyrin dye, we show that such substrates enable simple one-step fabrication of O2sensors by standard and scalable polymer processing technologies. In addition, the resulting sensor materials show prominent response to tensile drawing via changes in phosphorescence intensity and lifetime and O2quenching constant, Kq. The mechanosensitive response shows reversibility and hysteresis, which are related to macroscopic changes in the nanoporous structure of the polymer. Such multifunctional materials can find use as mechanically tunable O2sensors, as well as strain/deformation sensors operating in a phosphorescence-lifetime-based detection mode.
authors.affiliation: School of Biochemistry and Cell Biology, University College Cork , Western Road, Cork T12 YN60, Ireland.
authors.forename: Irina A
authors.initials: IA
authors.lastname: Okkelman
authors.affiliation: Faculty of Chemistry, Lomonosov Moscow State University , Leninskiye Gory, Moscow 119991, Russia.
authors.forename: Alla A
authors.initials: AA
authors.lastname: Dolgova
authors.affiliation: School of Biochemistry and Cell Biology, University College Cork , Western Road, Cork T12 YN60, Ireland.
authors.forename: Swagata
authors.initials: S
authors.lastname: Banerjee
authors.affiliation: School of Biochemistry and Cell Biology, University College Cork , Western Road, Cork T12 YN60, Ireland.
authors.forename: Joseph P
authors.initials: JP
authors.lastname: Kerry
authors.affiliation: Faculty of Chemistry, Lomonosov Moscow State University , Leninskiye Gory, Moscow 119991, Russia.
authors.forename: Aleksandr
authors.initials: A
authors.lastname: Volynskii
authors.affiliation: Faculty of Chemistry, Lomonosov Moscow State University , Leninskiye Gory, Moscow 119991, Russia.
authors.forename: Olga V
authors.initials: OV
authors.lastname: Arzhakova
authors.affiliation: School of Biochemistry and Cell Biology, University College Cork , Western Road, Cork T12 YN60, Ireland.
authors.forename: Dmitri B
authors.identifier: http://orcid.org/0000-0003-1556-1145
authors.initials: DB
authors.lastname: Papkovsky
keywords: Mechanosensitive materials; hard elastic polymers; mechanically tunable oxygen sensors; phosphorescence-based sensors; strain and deformation sensors