Molecular Assembly on Two-Dimensional Materials

Abstract

Molecular self-assembly is a well-known technique to create highly functional nanostructures on surfaces. Self-assembly on two-dimensional materials is a developing field and has already resulted in the discovery of several rich and interesting phenomena. Here, we review this progress with an emphasis on the electronic properties of the adsorbates and the substrate in well-defined systems, as unveiled by scanning tunneling microscopy (STM). We cover three aspects of the self-assembly. The first one focuses on non-covalent self-assembly dealing with site-selectivity due to inherent moire pattern present on 2D materials deposited on substrates. Modification of intermolecular interactions and molecule-substrate interactions influences the assembly drastically and 2D materials can also be used as a platform to carry out covalent and metal-coordinated assembly. The second part deals with the electronic properties of molecules adsorbed on 2D materials. By virtue of being inert and possessing low density of states near the Fermi level, 2D materials decouple molecules electronically from the underlying metal substrate and allow high-resolution spectroscopy and imaging of molecular orbitals. The moire pattern on the 2D materials causes site-selective gating and charging of molecules in some cases. The last section covers the effects of self-assembled organic molecules on the electronic properties of graphene as revealed by spectroscopy and electrical transport measurements. Non-covalent functionalization of 2D materials has already been applied for their application as catalysts and sensors. With the current surge of activity on building van der Waals heterostructures from 2D materials, molecular self-assembly has the potential to add an extra level of flexibility and functionality for applications ranging from flexible electronics and OLEDs to novel electronic devices and spintronics.

46 pages, 11 figures, topical review paper,

References in corpus (19)

• The electronic properties of graphene
• Boron nitride substrates for high-quality graphene electronics
• Energy Band Gap Engineering of Graphene Nanoribbons
• Control of graphene's properties by reversible hydrogenation
• On-surface synthesis of graphene nanoribbons with zigzag edge topology
• Fluorographene: Two Dimensional Counterpart of Teflon
• Renormalization of Molecular Electronic Levels at Metal-Molecule Interfaces
• Molecular Transport Junctions: Vibrational Effects
• Dirac Cones and Minigaps for Graphene on Ir(111)
• New Generation of Massless Dirac Fermions in Graphene under External Periodic Potentials
• Chemically Tailoring Semiconducting Two-Dimensional Transition Metal Dichalcogenides and Black Phosphorus
• Is graphene on Ru(0001) a nanomesh?
• The environment of graphene probed by electrostatic force microscopy
• Weak Localization and Transport Gap in Graphene Antidot Lattices
• Electrically Controlled Adsorption of Oxygen in Bilayer Graphene Devices
• Epitaxial hexagonal boron nitride on Ir(111): A work function template
• Strongly reshaped organic-metal interfaces: Tetracyanoethylene on Cu(100)
• Topographic and electronic contrast of the graphene moiré on Ir(111) probed by scanning tunneling microscopy and non-contact atomic force microscopy
• Influence of graphene-substrate interactions on configurations of organic molecules on graphene: pentacene/epitaxial graphene/SiC

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• Electronic Characterization of a Charge-Transfer Complex Monolayer on Graphene
• Designing optoelectronic properties by on-surface synthesis: formation and electronic structure of an iron-terpyridine macromolecular complex
• 2D Ladder polyborane: an ideal Dirac semimetal with a multi-feld-tunable band gap
• A mesoscopic model of nanoclusters self-assembly on a graphene Moiré
• Interfacial Coupling Controls Molecular Epitaxy of HMTP on Graphene/SiC