Thermally-driven isotope separation across nanoporous graphene

Document Type

Journal Article

Role

Author

Standard Number

0009-2614

Journal Title

Chemical Physics Letters

Volume

521

First Page

118

Last Page

124

Publication Date

2012

Abstract

Quantum tunneling contributes to the transmission of atoms through nanoporous graphene barriers, even at room temperature. In a temperature gradient, the mass-dependence of tunneling leads to isotope separation, in contrast to the classical transmission case where no separation can occur. Using transition state theory, we show that zero-point and tunneling contributions enrich the isotopes in opposite directions with respect to the temperature gradient. Zero-point energy differences dominate around room temperature. --author-supplied description

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