Borghi Francesca, Mirigliano Matteo, Lenardi Cristina, Milani Paolo, Podestà Alessandro
CIMaINa and Dipartimento di Fisica "Aldo Pontremoli", Università degli Studi di Milano, Milano, Italy.
Front Chem. 2021 Feb 5;9:619432. doi: 10.3389/fchem.2021.619432. eCollection 2021.
Ionic liquids are employed in energy storage/harvesting devices, in catalysis and biomedical technologies, due to their tunable bulk and interfacial properties. In particular, the wettability and the structuring of the ionic liquids at the interface are of paramount importance for all those applications exploiting ionic liquids tribological properties, their double layer organization at electrified interfaces, and interfacial chemical reactions. Here we report an experimental investigation of the wettability and organization at the interface of an imidazolium-based ionic liquid ([Bmim][NTf2]) and gold surfaces, that are widely used as electrodes in energy devices, electronics, fluidics. In particular, we investigated the role of the nanostructure on the resulting interfacial interactions between [Bmim][NTf2] and atom-assembled or cluster-assembled gold thin films. Our results highlight the presence of the solid-like structured ionic liquid domains extending several tens of nanometres far from the gold interfaces, and characterized by different lateral extension, according to the wettability of the gold nanostructures by the IL liquid-phase.
由于离子液体具有可调节的本体和界面性质，它们被应用于能量存储/收集装置、催化和生物医学技术中。特别是，对于所有利用离子液体摩擦学性质、其在带电界面处的双层组织以及界面化学反应的应用而言，离子液体在界面处的润湿性和结构至关重要。在此，我们报告了对一种基于咪唑鎓的离子液体（[Bmim][NTf2]）与金表面之间界面处的润湿性和组织的实验研究，金表面在能量装置、电子学、流体ics中广泛用作电极。特别是，我们研究了纳米结构对[Bmim][NTf2]与原子组装或团簇组装的金薄膜之间产生的界面相互作用的作用。我们的结果突出了存在从金界面延伸数十纳米远的类固体结构的离子液体域，并且根据IL液相中金纳米结构的润湿性，其具有不同的横向延伸。
