Journal ArticleDOI
Optical Spectroscopy Investigation of the Structural and Electrical Evolution of Controllably Oxidized Graphene by a Solution Method
Reads0
Chats0
TLDR
In this paper, a precisely controlled chemical modification of exfoliated graphene on a substrate was achieved by solution-phase oxidation, which exhibited an energy band gap of 2 eV.Abstract:
A precisely controlled chemical modification of exfoliated graphene on a substrate was achieved by solution-phase oxidation. The structural and electrical evolution of graphene induced by oxygen-related defects was investigated using micro-Raman and photoluminescence spectroscopy. The sp2-hybrid carbon network in monolayer graphene was found to gradually decrease with increasing degree of oxidation. The size of the graphene quantum dots was finally reduced to about 1 nm, which exhibited an energy band gap of 2 eV. The double-layer graphene showed a symmetry breaking induced by the defects. The process of solution modification may provide a facile method to tailor the electrical properties of graphene on a chip for constructing carbon-based nanoelectronics.read more
Citations
More filters
Journal ArticleDOI
The chemical and structural analysis of graphene oxide with different degrees of oxidation
TL;DR: In this article, the formation of different types of oxygen containing functional groups in GO and their influences on its structure were analyzed using X-ray diffraction (XRD), Fourier transform infra-red spectra, x-ray photoelectron spectra (XPS), zeta potential analysis and Raman spectroscopy.
Journal ArticleDOI
Selective ionic transport through tunable subnanometer pores in single-layer graphene membranes.
Sean C. O'Hern,Michael S. H. Boutilier,Juan Carlos Idrobo,Yi Song,Jing Kong,Tahar Laoui,Muataz Ali Atieh,Rohit Karnik +7 more
TL;DR: The ability to tune the selectivity of graphene through controlled generation of subnanometer pores addresses a significant challenge in the development of advanced nanoporous graphene membranes for nanofiltration, desalination, gas separation, and other applications.
Journal ArticleDOI
Tuning the Electrical and Optical Properties of Graphene by Ozone Treatment for Patterning Monolithic Transparent Electrodes
TL;DR: A well-defined graphene pattern is demonstrated by using ozone photolithography, in which the ozone-treated graphene electrodes are monolithic but separated by insulating GO regions, indicating the promising use of ozone treatment to achieve high-performance graphene-based optoelectronic devices.
Journal ArticleDOI
Principles Governing Control of Aggregation and Dispersion of Graphene and Graphene Oxide in Polymer Melts
TL;DR: By combining coarse-grained molecular dynamics and newly developed accurate models of GO, the driving forces that lead to the various morphologies are resolved and computational methods to design directed synthesis routes for diverse self-assemblies and applications are provided.
Journal ArticleDOI
Disorder imposed limits of mono- and bilayer graphene electronic modification using covalent chemistry.
Chih-Jen Shih,Qing Hua Wang,Zhong Jin,Geraldine L.C. Paulus,Daniel Blankschtein,Pablo Jarillo-Herrero,Michael S. Strano +6 more
TL;DR: An electrochemical approach involving phenyl-diazonium salts is used to systematically probe electronic modification in MLG and BLG with increasing functionalization for the first time, obtaining the highest conversion values to date.
References
More filters
Journal ArticleDOI
Gate-induced insulating state in bilayer graphene devices
Jeroen B. Oostinga,Hubert B. Heersche,Xinglan Liu,Alberto F. Morpurgo,Lieven M. K. Vandersypen +4 more
TL;DR: This work demonstrates the controlled induction of an insulating state--with large suppression of the conductivity--in bilayer graphene, by using a double-gate device configuration that enables an electric field to be applied perpendicular to the plane.
Journal ArticleDOI
Fluorographene: A Two‐Dimensional Counterpart of Teflon
Rahul R. Nair,Wencai Ren,Rashid Jalil,Ibtsam Riaz,Vasyl G. Kravets,L. Britnell,Peter Blake,Fredrik Schedin,A. S. Mayorov,Shengjun Yuan,Mikhail I. Katsnelson,Hui-Ming Cheng,Wlodek Strupinski,Lyubov G. Bulusheva,Alexander V. Okotrub,Irina V. Grigorieva,Alexander N. Grigorenko,Kostya S. Novoselov,Andre K. Geim +18 more
TL;DR: F fluorographene is a high-quality insulator that inherits the mechanical strength of graphene, exhibiting a Young's modulus of 100 N m(-1) and sustaining strains of 15%.
Journal ArticleDOI
Atomic and Electronic Structure of Graphene-Oxide
K. Andre Mkhoyan,Alex W. Contryman,John Silcox,Derek Stewart,Goki Eda,Cecilia Mattevi,Steve Miller,Manish Chhowalla +7 more
TL;DR: The results of this detailed analysis reveal that the GO is rough with an average surface roughness of 0.6 nm and the structure is predominantly amorphous due to distortions from sp3 C-O bonds.
Journal ArticleDOI
Determination of the Local Chemical Structure of Graphene Oxide and Reduced Graphene Oxide
TL;DR: This study presents one particular synthetic method for GO and raGO, and reveals that the raGO material under study is greatly structurally dissimilar to graphene, being unstable under signifi cant electron beam.
Journal ArticleDOI
Graphene Oxidation: Thickness-Dependent Etching and Strong Chemical Doping
Li Liu,Sunmin Ryu,Michelle R. Tomasik,Elena Stolyarova,Naeyoung Jung,Mark S. Hybertsen,Michael L. Steigerwald,Louis E. Brus,George W. Flynn +8 more
TL;DR: It is found that O 2 etching kinetics vary strongly with the number of graphene layers in the sample, and three-layer-thick samples show etching similar to bulk natural graphite.