Reference : Quantum tunneling of thermal protons through pristine graphene
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/35796
Quantum tunneling of thermal protons through pristine graphene
English
Poltavskyi, Igor mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Tkatchenko, Alexandre mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Mortazavi, Majid [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany]
Zheng, Limin [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany]
31-May-2018
Journal of Chemical Physics
American Institute of Physics
148
20
204707
Yes (verified by ORBilu)
International
0021-9606
0021-9606
[en] thermal protons transport ; graphene ; tunneling
[en] Engineering of atomically thin membranes for hydrogen isotope separation is an actual challenge which has a broad range of applications. Recent experiments [M. Lozada-Hidalgo et al., Science 351, 68 (2016)] unambiguously demonstrate an order-of-magnitude difference in permeabilities of graphene-based membranes to protons and deuterons at ambient conditions, making such materials promising for novel separation technologies. Here we demonstrate that the permeability mechanism in such systems changes from quantum tunneling for protons to quasi-classical transport for heavier isotopes. Quantum nuclear effects exhibit large temperature and mass dependence, modifying the Arrhenius activation energy and Arrhenius prefactor for protons by more than 0.5 eV and by seven orders of magnitude correspondingly. Our findings not only shed light on the separation process for hydrogen isotope ions passing through pristine graphene but also offer new insights for controlling ion transport mechanisms in nanostructured separation membranes by manipulating the shape of the barrier and transport process conditions.
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/10993/35796
10.1063/1.5024317
FnR ; FNR11360857 > Alexandre Tkatchenko > QUANTION > Quantum Ion Tunneling and Scattering in Layered Nanomaterials > 01/03/2017 > 28/02/2020 > 2016

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
Quantum tunneling of thermal protons through pristine graphene.pdfPublisher postprint1.81 MBView/Open

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.