Open AccessJournal Article
Direct Imaging of a Two-Dimensional Silica Glass on Graphene
Pinshane Y. Huang,Simon Kurasch,Anchal Srivastava,Anchal Srivastava,Viera Skakalova,Viera Skakalova,Jani Kotakoski,Jani Kotakoski,Arkady V. Krasheninnikov,Arkady V. Krasheninnikov,Robert Hovden,Q. Mao,Jannik C. Meyer,Jannik C. Meyer,Jurgen H. Smet,David A. Muller,Ute Kaiser +16 more
TLDR
The accidental discovery of a 2D silica glass supported on graphene enables the first atomic resolution transmission electron microscopy of a glass, producing images that strikingly resemble Zachariasen's original 1932 cartoon models of 2D continuous random network glasses.Abstract:
Large-area graphene substrates provide a promising lab bench for synthesizing, manipulating, and characterizing low-dimensional materials, opening the door to high-resolution analyses of novel structures, such as two-dimensional (2D) glasses, that cannot be exfoliated and may not occur naturally. Here, we report the accidental discovery of a 2D silica glass supported on graphene. The 2D nature of this material enables the first atomic resolution transmission electron microscopy of a glass, producing images that strikingly resemble Zachariasen's original 1932 cartoon models of 2D continuous random network glasses. Atomic-resolution electron spectroscopy identifies the glass as SiO2 formed from a bilayer of (SiO4) 2− tetrahedra and without detectable covalent bonding to the graphene. From these images, we directly obtain ring statistics and pair distribution functions that span short-, medium-, and long-range order. Ab initio calculations indicate that van der Waals interactions with graphene energetically stabilizes the 2D structure with respect to bulk SiO2. These results demonstrate a new class of 2D glasses that can be applied in layered graphene devices and studied at the atomic scale.read more
Citations
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Graphene: An Emerging Electronic Material
Nathan O. Weiss,Hailong Zhou,Lei Liao,Yuan Liu,Shan Jiang,Yu Huang,Yu Huang,Xiangfeng Duan,Xiangfeng Duan +8 more
TL;DR: The versatility of graphene-based devices goes beyond conventional transistor circuits and includes flexible and transparent electronics, optoelectronics, sensors, electromechanical systems, and energy technologies.
Journal ArticleDOI
Computational Screening of 2D Materials for Photocatalysis
Arunima K. Singh,Kiran Mathew,Kiran Mathew,Houlong L. Zhuang,Richard G. Hennig,Richard G. Hennig +5 more
TL;DR: A computational screening approach is reviewed to rapidly and efficiently discover more 2D materials that possess properties suitable for solar water splitting and discusses future research directions and needed method developments for the computational design and optimization of 2D material for photocatalysis.
Journal ArticleDOI
Graphene-based semiconductor nanostructures
TL;DR: In this paper, the state-of-the-art in the field of semiconducting derivatives of GAs is summarized, including graphane, fluorographene, and diamane.
Journal ArticleDOI
Large Ultrathin Anatase TiO2 Nanosheets with Exposed {001} Facets on Graphene for Enhanced Visible Light Photocatalytic Activity
TL;DR: In this article, the photocatalytic activity of as-prepared anatase ultrathin TiO2 nanosheets for degradation of methylene blue (MB) under visible-light irradiation at λ ≥ 400 nm was investigated.
Journal ArticleDOI
TiO2 nanosheets with exposed {001} facets for photocatalytic applications
Chimmikuttanda Ponnappa Sajan,Swelm Wageh,Swelm Wageh,Ahmed Abdullah Salem Al-Ghamdi,Jiaguo Yu,Jiaguo Yu,Shaowen Cao +6 more
TL;DR: In this article, the authors summarized the recent progress in preparing {001}-TiO2 using different techniques such as hydrothermal, solvothermal, alcohothermal, chemical vapor deposition (CVD), and sol gel-based techniques.
References
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Journal ArticleDOI
Two-dimensional atomic crystals
Kostya S. Novoselov,Da Jiang,Fred Schedin,Timothy J. Booth,V. V. Khotkevich,Sergey V. Morozov,Andre K. Geim +6 more
TL;DR: By using micromechanical cleavage, a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides are prepared and studied.
Book
Electron Energy-Loss Spectroscopy in the Electron Microscope
Ray F. Egerton,Dale E. Newbury +1 more
TL;DR: In this article, the authors present an overview of the basic principles of energy-loss spectroscopy, including the use of the Wien filter, and the analysis of the inner-shell of the detector.
Journal ArticleDOI
Theoretical approaches to x-ray absorption fine structure
John J. Rehr,R. C. Albers +1 more
TL;DR: In this paper, the authors focus on extended x-ray absorption fine structure (EXAFS) well above an X-ray edge, and, to a lesser extent, on xray absorption near-edge structure (XANES) closer to an edge.
Journal ArticleDOI
Grains and grain boundaries in single-layer graphene atomic patchwork quilts
Pinshane Y. Huang,Carlos Ruiz-Vargas,Arend M. van der Zande,William S. Whitney,Mark Levendorf,Joshua W. Kevek,Shivank Garg,Jonathan S. Alden,Caleb Hustedt,Ye Zhu,Jiwoong Park,Paul L. McEuen,David A. Muller +12 more
TL;DR: This work determines the location and identity of every atom at a grain boundary and finds that different grains stitch together predominantly through pentagon–heptagon pairs, and reveals an unexpectedly small and intricate patchwork of grains connected by tilt boundaries.
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