High-yield parallel fabrication of quantum-dot monolayer single-electron devices displaying Coulomb staircase, contacted by graphene.

Autor: Fruhman JM; Cavendish Laboratory, University of Cambridge, Cambridge, UK. joel.fruhman@cantab.net., Astier HPAG; Cavendish Laboratory, University of Cambridge, Cambridge, UK. hipp.astier@cantab.net., Ehrler B; Cavendish Laboratory, University of Cambridge, Cambridge, UK., Böhm ML; Cavendish Laboratory, University of Cambridge, Cambridge, UK., Eyre LFL; Cavendish Laboratory, University of Cambridge, Cambridge, UK., Kidambi PR; Department of Engineering, University of Cambridge, Cambridge, UK.; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA., Sassi U; Cambridge Graphene Centre, Cambridge, UK., De Fazio D; Cambridge Graphene Centre, Cambridge, UK., Griffiths JP; Cavendish Laboratory, University of Cambridge, Cambridge, UK., Robson AJ; Department of Physics, Lancaster University, Lancaster, UK., Robinson BJ; Department of Physics, Lancaster University, Lancaster, UK., Hofmann S; Department of Engineering, University of Cambridge, Cambridge, UK., Ferrari AC; Cambridge Graphene Centre, Cambridge, UK., Ford CJB; Cavendish Laboratory, University of Cambridge, Cambridge, UK. cjbf@cam.ac.uk.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 Jul 14; Vol. 12 (1), pp. 4307. Date of Electronic Publication: 2021 Jul 14.
DOI: 10.1038/s41467-021-24233-2
Abstrakt: It is challenging for conventional top-down lithography to fabricate reproducible devices very close to atomic dimensions, whereas identical molecules and very similar nanoparticles can be made bottom-up in large quantities, and can be self-assembled on surfaces. The challenge is to fabricate electrical contacts to many such small objects at the same time, so that nanocrystals and molecules can be incorporated into conventional integrated circuits. Here, we report a scalable method for contacting a self-assembled monolayer of nanoparticles with a single layer of graphene. This produces single-electron effects, in the form of a Coulomb staircase, with a yield of 87 ± 13% in device areas ranging from < 800 nm 2 to 16 μm 2 , containing up to 650,000 nanoparticles. Our technique offers scalable assembly of ultra-high densities of functional particles or molecules that could be used in electronic integrated circuits, as memories, switches, sensors or thermoelectric generators.
(© 2021. The Author(s).)
Databáze: MEDLINE
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