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Real-time monitoring of self-assembling worm-like micelle formation by organic transistors

机译：实时监测有机晶体管自组装蠕虫状胶束的形成

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Thanks to their appealing rheological properties, nowadays micellar solutions play a fundamental role in many industrial sectors, including personal care products, cosmetics and pharmaceuticals. The use of these solutions and their effectiveness in the desired application is, however, strongly dependent on the specific micellar aggregation form and the related degree of entanglement. To this end, it should be mentioned that, still today, the type and size of the micellar aggregates in a solution can be only investigated by using sophisticated laboratory techniques, which are very difficult to be applied directly in real industrial production sites. In this study, we demonstrate that organic electrochemical transistors (OECTs) based on PEDOT: PSS active channels can be used to reveal the presence of worm-like micelles in surfactant-salt aqueous solutions. In the worm-like regime the response of these devices displays distinctive features in comparison with those exhibited when pure surfactant solutions, containing only spherical micelles, are analysed. Our results could pave the way to the development of a new class of portable and user-friendly devices, suitable for the in situ monitoring of morphological transitions, involving micellar aggregates.
机译：由于具有吸引人的流变性能，如今，胶束解决方案在许多工业领域（包括个人护理产品，化妆品和药品）中发挥着重要作用。但是，这些解决方案的使用及其在所需应用中的有效性在很大程度上取决于特定的胶束聚集形式和相关的缠结程度。为此，应该提到的是，直到今天，溶液中的胶束聚集体的类型和大小仍只能通过使用复杂的实验室技术进行研究，而这些技术很难直接应用于实际的工业生产现场。在这项研究中，我们证明了基于PEDOT：PSS活性通道的有机电化学晶体管（OECT）可用于揭示表面活性剂-盐水溶液中蠕虫状胶束的存在。与仅分析球形胶束的纯表面活性剂溶液相比，在蠕虫状环境中，这些装置的响应显示出鲜明的特征。我们的结果可能为开发新型便携式和用户友好设备铺平道路，该设备适用于现场监测涉及胶束聚集体的形态学转变。

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