Nanophase segregation and rectification in monolayers of functionalized hexa-peri-hexabenzocoronenes

F. Jäckel; X. Yin; P. Samorì; N. Tchebotareva; M. D. Watson; A. Venturini; K. Müllen; J. P. Rabe

doi:10.1016/j.synthmet.2004.06.048

Nanophase segregation and rectification in monolayers of functionalized hexa-peri-hexabenzocoronenes

F. Jäckel, X. Yin, P. Samorì, N. Tchebotareva, M. D. Watson, A. Venturini, K. Müllen, J. P. Rabe

Chemistry

Research output: Contribution to journal › Conference article › peer-review

5 Scopus citations

Abstract

We report a scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) study on the structural and electronic transport properties of self-assembled monolayers of functionalized hexa-peri-hexabenzocoronenes (HBCs) at the graphite-solution interface. The HBCs bearing either one pyrene (PY) or six anthraquinone (AQ) substituents form two-dimensional crystalline arrays where the HBC and the additional moieties are phase segregated on the nanoscale. Differences in contrast between the HBCs and their substituants can be correlated with the results of quantum chemical calculations on the frontier orbitals of the different moieties. The variation of the tunneling parameters in the STM provides further insight into the markedly different electronic properties of the HBC and the AQ moieties at the interface. Furthermore, STS investigations revealed an inverse rectifying behavior of the two different moieties within the tunneling junction, which can be explained with resonantly enhanced tunneling through the HOMO of the HBC and the LUMO of the AQ. This study opens new possibilities for the research towards mono-molecular electronics.

Original language	English
Pages (from-to)	5-9
Number of pages	5
Journal	Synthetic Metals
Volume	147
Issue number	1-3
DOIs	https://doi.org/10.1016/j.synthmet.2004.06.048
State	Published - Dec 7 2004
Event	Supramolecular Approaches to Organic Electronics and Nanotechn. - Strasbourg, France Duration: May 24 2004 → May 28 2004

Bibliographical note

Funding Information:
This work was supported by the EU through DISCEL and MAC-MES, the ESF through SMARTON and SONS-BIONICS, and the German BMBF (03N 6500).

Keywords

Molecular electronics
STM/STS
Self-assembly

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.synthmet.2004.06.048

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title = "Nanophase segregation and rectification in monolayers of functionalized hexa-peri-hexabenzocoronenes",

abstract = "We report a scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) study on the structural and electronic transport properties of self-assembled monolayers of functionalized hexa-peri-hexabenzocoronenes (HBCs) at the graphite-solution interface. The HBCs bearing either one pyrene (PY) or six anthraquinone (AQ) substituents form two-dimensional crystalline arrays where the HBC and the additional moieties are phase segregated on the nanoscale. Differences in contrast between the HBCs and their substituants can be correlated with the results of quantum chemical calculations on the frontier orbitals of the different moieties. The variation of the tunneling parameters in the STM provides further insight into the markedly different electronic properties of the HBC and the AQ moieties at the interface. Furthermore, STS investigations revealed an inverse rectifying behavior of the two different moieties within the tunneling junction, which can be explained with resonantly enhanced tunneling through the HOMO of the HBC and the LUMO of the AQ. This study opens new possibilities for the research towards mono-molecular electronics.",

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note = "Funding Information: This work was supported by the EU through DISCEL and MAC-MES, the ESF through SMARTON and SONS-BIONICS, and the German BMBF (03N 6500).; Supramolecular Approaches to Organic Electronics and Nanotechn. ; Conference date: 24-05-2004 Through 28-05-2004",

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TY - JOUR

T1 - Nanophase segregation and rectification in monolayers of functionalized hexa-peri-hexabenzocoronenes

AU - Jäckel, F.

AU - Yin, X.

AU - Samorì, P.

AU - Tchebotareva, N.

AU - Watson, M. D.

AU - Venturini, A.

AU - Müllen, K.

AU - Rabe, J. P.

N1 - Funding Information: This work was supported by the EU through DISCEL and MAC-MES, the ESF through SMARTON and SONS-BIONICS, and the German BMBF (03N 6500).

PY - 2004/12/7

Y1 - 2004/12/7

N2 - We report a scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) study on the structural and electronic transport properties of self-assembled monolayers of functionalized hexa-peri-hexabenzocoronenes (HBCs) at the graphite-solution interface. The HBCs bearing either one pyrene (PY) or six anthraquinone (AQ) substituents form two-dimensional crystalline arrays where the HBC and the additional moieties are phase segregated on the nanoscale. Differences in contrast between the HBCs and their substituants can be correlated with the results of quantum chemical calculations on the frontier orbitals of the different moieties. The variation of the tunneling parameters in the STM provides further insight into the markedly different electronic properties of the HBC and the AQ moieties at the interface. Furthermore, STS investigations revealed an inverse rectifying behavior of the two different moieties within the tunneling junction, which can be explained with resonantly enhanced tunneling through the HOMO of the HBC and the LUMO of the AQ. This study opens new possibilities for the research towards mono-molecular electronics.

AB - We report a scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) study on the structural and electronic transport properties of self-assembled monolayers of functionalized hexa-peri-hexabenzocoronenes (HBCs) at the graphite-solution interface. The HBCs bearing either one pyrene (PY) or six anthraquinone (AQ) substituents form two-dimensional crystalline arrays where the HBC and the additional moieties are phase segregated on the nanoscale. Differences in contrast between the HBCs and their substituants can be correlated with the results of quantum chemical calculations on the frontier orbitals of the different moieties. The variation of the tunneling parameters in the STM provides further insight into the markedly different electronic properties of the HBC and the AQ moieties at the interface. Furthermore, STS investigations revealed an inverse rectifying behavior of the two different moieties within the tunneling junction, which can be explained with resonantly enhanced tunneling through the HOMO of the HBC and the LUMO of the AQ. This study opens new possibilities for the research towards mono-molecular electronics.

KW - Molecular electronics

KW - STM/STS

KW - Self-assembly

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T2 - Supramolecular Approaches to Organic Electronics and Nanotechn.

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ER -

Nanophase segregation and rectification in monolayers of functionalized hexa-peri-hexabenzocoronenes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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