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Corrugated single layer templates for molecules: From h-BN nanomesh to graphene based quantum dot arrays


Ma, H; Thomann, M; Schmidlin, J; Roth, S; Morscher, M; Greber, T (2010). Corrugated single layer templates for molecules: From h-BN nanomesh to graphene based quantum dot arrays. Frontiers of Physics in China, 5(4):387-392.

Abstract

Functional nano-templates enable self-assembly of otherwise impossible arrangements of
molecules. A particular class of such templates is that of sp2 hybridized single layers of hexagonal
boron nitride or carbon (graphene) on metal supports. If the substrate and the single layer
have a lattice mismatch, superstructures are formed. On substrates like rhodium or ruthenium
these superstructures have unit cells with ∼3-nm lattice constant. They are corrugated and
contain sub-units, which behave like traps for molecules or quantum dots, which are small
enough to become operational at room temperature. For graphene on Rh(111) we emphasize
a new structural element of small extra hills within the corrugation landscape. For the case of
molecules like water it is shown that new phases assemble on such templates, and that they can
be used as “nano-laboratories” where many individual processes are studied in parallel. Furthermore,
it is shown that the h-BN/Rh(111) nanomesh displays a strong scanning tunneling
microscopy-induced luminescence contrast within the 3 nm unit cell which is a way to address
trapped molecules and/or quantum dots.

Abstract

Functional nano-templates enable self-assembly of otherwise impossible arrangements of
molecules. A particular class of such templates is that of sp2 hybridized single layers of hexagonal
boron nitride or carbon (graphene) on metal supports. If the substrate and the single layer
have a lattice mismatch, superstructures are formed. On substrates like rhodium or ruthenium
these superstructures have unit cells with ∼3-nm lattice constant. They are corrugated and
contain sub-units, which behave like traps for molecules or quantum dots, which are small
enough to become operational at room temperature. For graphene on Rh(111) we emphasize
a new structural element of small extra hills within the corrugation landscape. For the case of
molecules like water it is shown that new phases assemble on such templates, and that they can
be used as “nano-laboratories” where many individual processes are studied in parallel. Furthermore,
it is shown that the h-BN/Rh(111) nanomesh displays a strong scanning tunneling
microscopy-induced luminescence contrast within the 3 nm unit cell which is a way to address
trapped molecules and/or quantum dots.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2010
Deposited On:13 Feb 2011 17:55
Last Modified:07 Dec 2017 07:15
Publisher:Springer
ISSN:1673-3487
Publisher DOI:https://doi.org/10.1007/s11467-010-0137-0
Related URLs:http://arxiv.org/abs/1006.5692

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