School of Biochemistry and Cell Biology, University College Cork , Western Road, Cork T12 YN60, Ireland.
Faculty of Chemistry, Lomonosov Moscow State University , Leninskiye Gory, Moscow 119991, Russia.
ACS Appl Mater Interfaces. 2017 Apr 19;9(15):13587-13592. doi: 10.1021/acsami.7b00405. Epub 2017 Apr 10.
It is well known that sensitivity of quenched-phosphorescence O sensors 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 O sensors 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 O quenching constant, K. 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 O sensors, as well as strain/deformation sensors operating in a phosphorescence-lifetime-based detection mode.
众所周知，通过改变作为封装和猝灭介质的指示剂染料和主聚合物的性质，可以调整猝灭磷光 O 传感器的灵敏度。在这里，我们描述了一种基于纳米结构硬弹性聚合物基质的新型传感器材料。我们以用 Pt-苯并卟啉染料浸渍的硬弹性聚丙烯薄膜为例，表明此类基质可通过标准和可扩展的聚合物加工技术来简单地一步制造 O 传感器。此外，所得的传感器材料通过磷光强度和寿命以及 O 猝灭常数 K 的变化对拉伸拉伸表现出明显的响应。机械敏感响应具有可逆性和滞后性，这与聚合物的纳米多孔结构的宏观变化有关。这种多功能材料可用作机械可调 O 传感器，以及基于磷光寿命的检测模式运行的应变/变形传感器。
