Synthesis of Graphene with Tunable Crystallinity and Porosity

  • Author: Liam Critchley
  • Published: 28 June 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: ACS Nano/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Synthesis of Graphene with Tunable Crystallinity and Porosity

There are many methods for producing different forms of graphene. Top-down methods tend to be the most commercially viable methods for producing large volumes. Bottom-up methods are often more tunable and produce higher-quality graphene products.


Andrey Turchanin, Universities of Jena and Ulm, Germany, Andreas Terfort, University of Frankfurt, Germany, and colleagues have developed a method for producing porous graphene and tuning the product's porosity and crystallinity. The researchers used self-assembled monolayers (SAMs) of aromatic molecules as precursors for the graphene.


The team chose SAMs that contain pyridine and pyrrole constituents. The SAMs were placed on copper foils and converted into carbon nanomembranes through a low-energy electron-irradiation-induced cross-linking reaction. This was followed by a conversion into graphene monolayers through pyrolysis.


Pores are formed in the graphene sheet when the precursors' nitrogen atoms leave the carbon nanosheets during the pyrolysis reaction. The pyrolysis temperature and choice of SAM precursor can both be used to tune the degree of porosity and crystallinity in the graphene sheet. The resulting porous graphene sheets have properties that resemble graphene nanoribbons (GNRs), with a charge carrier mobility of around 600 cm2/(Vs).


 

Article Views: 705

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH