Polycrystalline Graphene with Single Crystalline Electronic Structure

• Published in: Nano letters Vol. 14; no. 10; pp. 5706 - 5711
• Main Authors: Brown, Lola, Lochocki, Edward B, Avila, José, Kim, Cheol-Joo, Ogawa, Yui, Havener, Robin W, Kim, Dong-Ki, Monkman, Eric J, Shai, Daniel E, Wei, Haofei I, Levendorf, Mark P, Asensio, María, Shen, Kyle M, Park, Jiwoong
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 08.10.2014
• Subjects: Boron nitride; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystal structure; Electronic structure; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic structure of nanoscale materials : clusters, nanoparticles, nanotubes, and nanocrystals; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Foils (structural shapes); Fullerenes and related materials; diamonds, graphite; General studies of phase transitions; Graphene; Materials science; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Nanostructure; Nucleation; Optoelectronics; Physics; Specific materials; Structure of solids and liquids; crystallography; artificial twisted bilayer; dark-field transmission electron microscopy; Graphene; hexagonal boron nitride; angle-resolved photoemission spectroscopy; Thin films; Monocrystals; Electronic structure; Hexagonal crystals; Nucleation; Optoelectronic properties; Growth mechanism; Polycrystals; Heterostructures; Bilayers; Crystal structure
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl502445j

We report the scalable growth of aligned graphene and hexagonal boron nitride on commercial copper foils, where each film originates from multiple nucleations yet exhibits a single orientation. Thorough characterization of our graphene reveals uniform crystallographic and electronic structures on length scales ranging from nanometers to tens of centimeters. As we demonstrate with artificial twisted graphene bilayers, these inexpensive and versatile films are ideal building blocks for large-scale layered heterostructures with angle-tunable optoelectronic properties.