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. 2023 Jun 1;11:1172687. doi: 10.3389/fchem.2023.1172687

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Copyright © 2023 Xavier, Payne, Bauerfeldt and Sacchi.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Representation of the (A) 12-ZGNR model and the unique-symmetry adsorption sites, Z1, Z2, Z3 and Z4 and the (B) 12-AGNR model and the unique-symmetry adsorption sites A1, A2, A3 and A4, investigated in this work. To better illustrate, the upper edge are hydrogen free whereas the lower edge is passivated with hydrogen. (C) Depictions of the orientations of methane with respect to the graphene nanoribbons, considered in this work. (D) Adsorptions sites for the methane in the same plane of the 12-ZGNR.