摘要
基于分子自组装的分形、准晶等非周期有序结构的表面制备在近年来取得了一系列进展.本文综述了基于扫描隧道显微镜对表面谢尔宾斯基三角分形结构和准晶结构的研究.通过改变前驱体类型,可在不同基底上分别实现基于卤键、氢键、配位键、共价键的谢尔宾斯基三角分形结构的制备,并结合模板法和共组装法,突破生长动力学的限制,使得分形结构的级数达到五级.利用羧基间的氢键作用,可通过分子自组装构建表面分子准晶结构,并通过有机分子与稀土原子间的配位作用,成功实现金属有机配位准晶的制备.
In recent years, much progress has been made in aperiodic ordered surface structures such as fractal and quasicrystal that can be synthesized by molecular self-assembly. Here we review the research progress of Sierpiński triangle fractal structures and quasicrystal structures on metal surfaces investigated by scanning tunneling microscopy.Constructions of Sierpiński triangle fractals with halogen, hydrogen, coordination and covalent bonds were realized on different basal surfaces via changing the precursor types, and complete fifth-order fractals were successfully prepared by a combination of the templating and co-assembly methods overcoming the surface kinetic limitations. Surface molecular quasicrystals were fabricated by utilizing the hydrogen bond between carboxylic acid groups through molecular selfassembly for the first time, and metal-organic coordination quasicrystals were successfully prepared by the coordination between organic molecule and rare-earth atoms.
引文
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