Dimethyl sulfoxide (DMSO) is sometimes used as a solvent in the preparation of Langmuir-Blodgett (LB) films. By analogy with standard volatile solvents, it is often assumed that DMSO has no further effect once the solute molecules are distributed over the subphase surface. We hypothesized that this is not always the case and that DMSO may play an important role by remaining on the surface after spreading, contributing to the isotherms, influencing the formation of the LB film, and being incorporated into the resulting film. We studied the spreading of pure DMSO and the properties of Langmuir (spread) and Gibbs (adsorbed) layers of DMSO on water, proposed a robust approach to form the spread layers, and used the LB method to fabricate multilayer films on solid substrates. DMSO, which is completely miscible with water, can itself form a spreading surface layer very similar to the Langmuir layers of insoluble amphiphiles. When transferred repeatedly to a substrate, this layer forms a remarkably stable, poorly soluble multilayer film.

中文翻译：

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朗缪尔槽中的二甲亚砜


二甲亚砜 (DMSO) 有时用作制备 Langmuir-Blodgett (LB) 薄膜的溶剂。通过与标准挥发性溶剂类比，通常假设一旦溶质分子分布在面下相表面，DMSO 就不再产生进一步的作用。我们假设情况并非总是如此，DMSO 可能发挥重要作用，在铺展后保留在表面上，有助于等温线，影响 LB 膜的形成，并并入所得膜中。我们研究了纯 DMSO 的铺展以及 DMSO 在水中的 Langmuir（铺展）层和 Gibbs（吸附）层的性质，提出了一种形成铺展层的稳健方法，并使用 LB 方法在固体基材上制备多层薄膜。 DMSO 与水完全混溶，本身可以形成与不溶性两亲物的 Langmuir 层非常相似的铺展表面层。当重复转移到基材上时，该层形成非常稳定、难溶的多层膜。