Constructing an array of anchored single-molecule rotors on gold surfaces

Molecular rotors with a fixed off-center rotation axis have been observed for single tetra-tert-butyl zinc phthalocyanine molecules on an Au(111) surface by a scanning tunneling microscope at LN2 temperature. Experiments and first-principles calculations reveal that we introduce gold adatoms at the...

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Published in:Physical review letters 2008-11, Vol.101 (19), p.197209-197209, Article 197209
Main Authors: Gao, L, Liu, Q, Zhang, Y Y, Jiang, N, Zhang, H G, Cheng, Z H, Qiu, W F, Du, S X, Liu, Y Q, Hofer, W A, Gao, H-J
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cited_by cdi_FETCH-LOGICAL-c476t-84b5dbe2e22bdfd01ba1de52ba3a96a6c22239697863af5ef5554179810714933
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container_end_page 197209
container_issue 19
container_start_page 197209
container_title Physical review letters
container_volume 101
creator Gao, L
Liu, Q
Zhang, Y Y
Jiang, N
Zhang, H G
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Liu, Y Q
Hofer, W A
Gao, H-J
description Molecular rotors with a fixed off-center rotation axis have been observed for single tetra-tert-butyl zinc phthalocyanine molecules on an Au(111) surface by a scanning tunneling microscope at LN2 temperature. Experiments and first-principles calculations reveal that we introduce gold adatoms at the surface as the stable contact of the molecule to the surface. An off-center rotation axis is formed by a chemical bonding between a nitrogen atom of the molecule and a gold adatom at the surface, which gives them a well-defined contact while the molecules can have rotation-favorable configurations. Furthermore, these single-molecule rotors self-assemble into large scale ordered arrays on Au(111) surfaces. A fixed rotation axis off center is an important step towards the eventual fabrication of molecular motors or generators.
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title Constructing an array of anchored single-molecule rotors on gold surfaces
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