Abstract Cholesterol is widely used in the field of amphiphilic self-assembly as a small organic molecular structural unit. In this article, new cholesterol amide derivative (CHAM) films via molecular self-assembly technology have been successfully prepared. Scanning electron microscope, transmission electron microscope, UV–Vis spectra, atomic force microscopy (AFM), contact angle and Fourier transform infrared spectroscopy were measured to characterize the morphology and nanostructure of the prepared self-assembled CHAM Langmuir–Blodgett (LB) films. The obtained experimental data revealed that different subphases played an important role in formation of a stable LB film, resulting in different assembly behavior. CHAM contains adamantane units and highly symmetrical tricyclic aliphatic hydrocarbon clusters, so it can combined with cyclodextrin through host–guest interact, for CHAM act as host and cyclodextrin containing a hydrophobic cavity act as guest. The morphology of single-layer Langmuir films with different subphases was characterized by AFM, indicating that the CHAM molecules formed a stable LB films on the surface of the pure water subphase, cyclodextrin subphase and cyclodextrin polymer subphase. The photoelectric properties were characterized by J-V characteristics, EIS response and impedance map, and it was found that the CHAM film had better photoelectric properties.

中文翻译：

---

自组装胆固醇酰胺衍生物朗缪尔-布洛杰特薄膜中的界面纳米结构和光电特性

摘要 胆固醇作为有机小分子结构单元被广泛应用于两亲自组装领域。本文通过分子自组装技术成功制备了新型胆固醇酰胺衍生物（CHAM）薄膜。测量扫描电子显微镜、透射电子显微镜、UV-Vis 光谱、原子力显微镜 (AFM)、接触角和傅立叶变换红外光谱，以表征制备的自组装 CHAM Langmuir-Blodgett (LB) 薄膜的形貌和纳米结构。获得的实验数据表明，不同的亚相在形成稳定的 LB 薄膜中起重要作用，导致不同的组装行为。CHAM 含有金刚烷单元和高度对称的三环脂肪烃簇，所以它可以通过主客体相互作用与环糊精结合，因为CHAM作为主体，含有疏水腔的环糊精作为客体。具有不同亚相的单层朗缪尔膜的形貌通过 AFM 表征，表明 CHAM 分子在纯水亚相、环糊精亚相和环糊精聚合物亚相的表面形成了稳定的 LB 膜。光电性能通过JV特性、EIS响应和阻抗图表征，发现CHAM薄膜具有更好的光电性能。表明 CHAM 分子在纯水亚相、环糊精亚相和环糊精聚合物亚相的表面形成了稳定的 LB 膜。光电性能通过JV特性、EIS响应和阻抗图表征，发现CHAM薄膜具有更好的光电性能。表明 CHAM 分子在纯水亚相、环糊精亚相和环糊精聚合物亚相的表面形成了稳定的 LB 膜。光电性能通过JV特性、EIS响应和阻抗图表征，发现CHAM薄膜具有更好的光电性能。