Sieving hydrogen isotopes through two dimensional crystals
M. Lozada-Hidalgo,S. Hu,Owen P. Marshall,Artem Mishchenko,Alexander N. Grigorenko,Robert A. W. Dryfe,Boya Radha,Irina V. Grigorieva,Andre K. Geim +8 more
TLDR
In this article, the isotope effect is attributed to a difference of about 60 meV between zero-point energies of incident protons and deuterons, which translates into the equivalent difference in the activation barriers posed by two-dimensional crystals.Abstract:
One-atom-thick crystals are impermeable to atoms and molecules, but hydrogen ions (thermal protons) penetrate through them. We show that monolayers of graphene and boron nitride can be used to separate hydrogen ion isotopes. Employing electrical measurements and mass spectrometry, we find that deuterons permeate through these crystals much slower than protons, resulting in a separation factor of ~10 at room temperature. The isotope effect is attributed to a difference of about 60 meV between zero-point energies of incident protons and deuterons, which translates into the equivalent difference in the activation barriers posed by two dimensional crystals. In addition to providing insight into the proton transport mechanism, the demonstrated approach offers a competitive and scalable way for hydrogen isotope enrichment.read more
Citations
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Book ChapterDOI
Materials and Applications for Plasma Spraying
TL;DR: Flame sprayed coatings have found wide utilization as protective and decorative coatings as discussed by the authors, and this process has been effective for fabricating complex thin wall components, and many applications for metal, ceramic and organic coatings are described in the literature.
Electrically-Driven Ion Transmission Through Two-Dimensional Nanomaterials
TL;DR: In this paper, the authors tested the hypothesis that the selectivity ratio of hydrogen isotopes (protium, Deuterium, and tritium) through membrane could be improved by incorporating graphene and related 2D materials in the membrane electrode assembly of a polymer electrolyte membrane electrolysis cell.
Posted Content
Conductivity Equations of Protons Transporting Through 2D Crystals Obtained with the Rate Process Theory and Free Volume Concept
Tian Hao,Yuanze Xu,Ting Hao +2 more
TL;DR: In this paper, it was shown that only the number of conduction protons, proton size and packing structure, and the energy barrier associated with 2D crystals are critical for 2D crystal quantization conductance.
Journal ArticleDOI
Limits on gas impermeability of graphene.
Pengzhan Sun,Q. Yang,Wenjun Kuang,Y. V. Stebunov,Wenqi Xiong,Jin Yu,Rahul R. Nair,Mikhail I. Katsnelson,Shengjun Yuan,Shengjun Yuan,Irina V. Grigorieva,M. Lozada-Hidalgo,FengChao Wang,FengChao Wang,Andre K. Geim +14 more
TL;DR: In this article, it was shown that defect-free graphene is impermeable to all gases and liquids, even though it is only one-atom thick, despite being only one atom thick.
References
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