TITLE

Large contrast enhancement of graphene monolayers by angle detection

AUTHOR(S)
Yu, V.; Hilke, M.
PUB. DATE
October 2009
SOURCE
Applied Physics Letters;10/12/2009, Vol. 95 Issue 15, p151904
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Exfoliated graphene monolayers are identified by optical inspection. In order to improve the monolayer detection, we investigate the angle dependence of the optical contrast of graphene on a 90 nm SiO2/Si substrate. We observe a significant enhancement of the visibility of graphene by changing the polarization and the angle of optical incidence. This method can be used to detect graphene on arbitrary substrates such as GaAs/AlAs based materials, which have a much cleaner surface.
ACCESSION #
44665217

 

Related Articles

  • Ultrasound exfoliation of inorganic analogues of graphene. Štengl, Václav; Henych, Jiří; Slušná, Michaela; Ecorchard, Petra // Nanoscale Research Letters;Dec2014, Vol. 9 Issue 1, p1 

    High-intensity ultrasound exfoliation of a bulk-layered material is an attractive route for large-scale preparation of monolayers. The monolayer slices could potentially be prepared with a high yield (up to 100%) in a few minutes. Exfoliation of natural minerals (such as tungstenite and...

  • Eliminating defects from graphene monolayers during chemical exfoliation. Kumar Srivastava, Pawan; Ghosh, Subhasis // Applied Physics Letters;1/28/2013, Vol. 102 Issue 4, p043102 

    Graphene layers with and without defects have been grown by chemically exfoliating graphite in organic solvents and characterized by different spectroscopic techniques. It has been shown that defects can be controlled in graphene layers while intercalating different organic molecules in...

  • Thermal Annealing of Exfoliated Graphene. Wang Xueshen; Li Jinjin; Zhong Qing; Zhong Yuan; Zhao Mengke // Journal of Nanomaterials;2013, p1 

    Monolayer graphene is obtained by mechanical exfoliation using scotch tapes. The effects of thermal annealing on the tape residues and edges of graphene are researched. Atomic force microscope images showed that almost all the residues could be removed in N2/H2 at 400°C but only agglomerated...

  • Making graphene by the kitchen-sink approach. RAVENSCROFT, MICHAEL // Chemical Week;6/8/2015, Vol. 177 Issue 16, p25 

    The article focuses on the production of high-quality graphene through the kitchen-sink approach which uses high-shear mixers and known as liquid-phase exfoliation process developed by researchers led by Jonathan Coleman at the Trinity College Dublin (RCD).

  • Graphene levitation. Tsakmakidis, Kosmas // Nature Materials;Jan2013, Vol. 12 Issue 1, p3 

    The article reports on a study by Silvano Lizzit and colleagues which reveals that oxygen intercalation through a graphene layer can disconnect a monolayer from its substrate and repair the usual electronic structure.

  • Microfocus infrared ellipsometry characterization of air-exposed graphene flakes. Weber, J. W.; Hinrichs, K.; Gensch, M.; van de Sanden, M. C. M.; Oates, T. W. H. // Applied Physics Letters;8/8/2011, Vol. 99 Issue 6, p061909 

    Graphene and ultrathin graphite flakes prepared by exfoliation were characterized by microfocus synchrotron infrared mapping ellipsometry. The dielectric function of graphene in a dry-air atmosphere is determined and compared to that of ultrathin graphite, bulk graphite, and gold. The imaginary...

  • In Situ and Simultaneous Synthesis of a Novel Graphene-Based Catalyst for Deep Hydrodesulfurization of Naphtha. Hajjar, Zeinab; Kazemeini, Mohammad; Rashidi, Alimorad; Bazmi, Mansour // Catalysis Letters;Sep2015, Vol. 145 Issue 9, p1660 

    In this research, a novel graphene-supported catalyst was prepared through which, a simultaneous chemical exfoliation of graphite and MoS powder performed preparing a new composite species and evaluated for the hydrodesulfurization reaction of naphtha and no sulfidation pretreatment was...

  • Ultrahigh-throughput exfoliation of graphite into pristine 'single-layer' graphene using microwaves and molecularly engineered ionic liquids. Matsumoto, Michio; Saito, Yusuke; Park, Chiyoung; Fukushima, Takanori; Aida, Takuzo // Nature Chemistry;Sep2015, Vol. 7 Issue 9, p730 

    Graphene has shown much promise as an organic electronic material but, despite recent achievements in the production of few-layer graphene, the quantitative exfoliation of graphite into pristine single-layer graphene has remained one of the main challenges in developing practical devices....

  • Role of Peroxide Ions in Formation of Graphene Nanosheets by Electrochemical Exfoliation of Graphite. Rao, Kodepelly Sanjeeva; Senthilnathan, Jaganathan; Liu, Yung-Fang; Yoshimura, Masahiro // Scientific Reports;2/28/2014, p1 

    This study demonstrates a facile, mild and environmentally-friendly sustainable (soft processing) approach for the efficient electrochemical exfoliation of graphite using a sodium hydroxide/hydrogen peroxide/water (NaOH/H2O2/H2O) system that can produce high-quality, anodic few-layer graphene...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics