Bottom-up DNA-guided molecular assembly is a technique of choice in modern organic device engineering. DNA, being a polyelectrolyte, is capable of mediating electrostatic interactions between different molecular building blocks. Here, we report DNA-mediated molecular assembly of an electrostatically driven triphenylene-surfactant complex monolayer. The monolayer, formed at air-water interface with DNA in the subphase, was studied using surface manometry and Brewster angle microscopy. Unlike that of the pristine system, the monolayer in presence of DNA showed enhanced stability and a remarkably high efficiency of deposition on solid supports. The morphologies of deposited films with controlled number of layers were studied using atomic force microscopy. In addition, UV-visible spectroscopy and grazing incidence X-ray diffraction (GIXRD) technique confirmed the presence of DNA in the deposited films. Since both triphenylene and surfactant are technologically relevant molecules, the DNA-mediated molecular assemblies deposited on solid substrates could find applications as functional materials in organic electronics.

自下而上的 DNA 引导分子组装是现代有机设备工程中的一种选择技术。DNA 作为一种聚电解质，能够介导不同分子结构单元之间的静电相互作用。在这里，我们报告了静电驱动的苯联苯-表面活性剂复合单层的 DNA 介导的分子组装。使用表面测压法和布鲁斯特角显微镜研究在气水界面与亚相中的 DNA 形成的单层。与原始系统不同，DNA 存在下的单层表现出增强的稳定性和在固体支持物上的显着高效沉积。使用原子力显微镜研究了具有受控层数的沉积膜的形态。此外，紫外可见光谱和掠入射 X 射线衍射 (GIXRD) 技术证实了沉积膜中存在 DNA。由于三亚苯和表面活性剂都是技术上相关的分子，因此沉积在固体基材上的 DNA 介导的分子组装体可以作为有机电子产品中的功能材料得到应用。