Unveiling the Multiradical Character of the Biphenylene Network and Its Anisotropic Charge Transport.

Isaac Alcón, Gaetano Calogero, Nick Papior, Aleandro Antidormi, Kenan Song, Aron W Cummings, Mads Brandbyge, Stephan Roche

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Recent progress in the on-surface synthesis and characterization of nanomaterials is facilitating the realization of new carbon allotropes, such as nanoporous graphenes, graphynes, and 2D π-conjugated polymers. One of the latest examples is the biphenylene network (BPN), which was recently fabricated on gold and characterized with atomic precision. This gapless 2D organic material presents uncommon metallic conduction, which could help develop innovative carbon-based electronics. Here, using first principles calculations and quantum transport simulations, we provide new insights into some fundamental properties of BPN, which are key for its further technological exploitation. We predict that BPN hosts an unprecedented spin-polarized multiradical ground state, which has important implications for the chemical reactivity of the 2D material under practical use conditions. The associated electronic band gap is highly sensitive to perturbations, as seen in finite temperature (300 K) molecular dynamics simulations, but the multiradical character remains stable. Furthermore, BPN is found to host in-plane anisotropic (spin-polarized) electrical transport, rooted in its intrinsic structural features, which suggests potential device functionality of interest for both nanoelectronics and spintronics.
Original languageEnglish (US)
JournalJournal of the American Chemical Society
DOIs
StatePublished - Apr 27 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-05-10
Acknowledgements: I.A. is grateful for a Juan de la Cierva postdoctoral grant (FJC2019-038971-I) from the Spanish Ministerio de Ciencia e Innovación. Financial support by Villum Fonden (00013340) is gratefully acknowledged. ICN2 is funded by the CERCA Programme from Generalitat de Catalunya and is supported by the Severo Ochoa program from Spanish MINECO (grant no. SEV-2017-0706). The Center for Nanostructured Graphene (CNG) is sponsored by the Danish National Research Foundation (DNRF103). S.R. acknowledges funding from the European Union Seventh Framework Programme under grant no. 881603 (Graphene Flagship).

ASJC Scopus subject areas

  • Biochemistry
  • Colloid and Surface Chemistry
  • General Chemistry
  • Catalysis

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