Mesoscopic Metallosupramolecular Texturing by Hierarchic Assembly

摘要

Currently,there is a strong interest in improving the fabrication and mesoscopic integration of functional nano-systems at surfaces.In particular,new pathways need to be developed to provide methodologies for the synthesis and embedding of nanostructures across multiple length scales.Herein,we introduce the combination of nanopatterning and controlled metal-organic assembly to process prestructured metallic templates and generate arrangements at a higher hierarchical level.We present results of scanning tunneling microscopy (STM) on the metal-directed assembly and mesoscopic organization of supramolecular architectures by using a textured metal substrate,that is,an Au(111) surface decorated with Fe or Co nanodot arrays.By tuning the local reaction conditions with co-deposited dicarboxylate linker molecules,distinct low-dimensional metallosupramolecular systems have been synthesized,which include regularly spaced iron terephthalate ribbons that form a grating whose extension is only limited by the substrate terrace morphology.These findings indicate that hierarchic assembly protocols blending physical nanopatterning and supramolecular engineering on surfaces are generally useful for fabricating nanomaterials with control of features at the mesoscopic level.