Free-standing graphene membranes on glass nanopores for ionic current measurements
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Authors
Abstract
jats:pA method is established to reliably suspend graphene monolayers across glass nanopores as a simple, low cost platform to study ionic transport through graphene membranes. We systematically show that the graphene seals glass nanopore openings with areas ranging from 180 nm2 to 20 μm2, allowing detailed measurements of ionic current and transport through graphene. In combination with in situ Raman spectroscopy, we characterise the defects formed in ozone treated graphene, confirming an increase in ionic current flow with defect density. This highlights the potential of our method for studying single molecule sensing and filtration.</jats:p>
Description
Keywords
Graphene, Nanoporous materials, Ozone, Raman spectra, Chemical vapor deposition
Journal Title
Applied Physics Letters
Conference Name
Journal ISSN
0003-6951
1077-3118
1077-3118
Volume Title
Publisher
AIP Publishing
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/K016636/1)
Engineering and Physical Sciences Research Council (EP/G037221/1)
Engineering and Physical Sciences Research Council (EP/G037221/1)
The authors would like to thank S. Purushothaman and K. Göpfrich for careful reading of the manuscript and V. Thacker for useful discussions. This work was supported by the EPSRC Cambridge NanoDTC, EP/G037221/1, and EPSRC grant GRAPHTED, EP/K016636/1. R.S.W. acknowledges a Research Fellowship from St. John's College, Cambridge. N.A.W.B. acknowledges an EPSRC doctoral prize award.