Strong electronic perturbation of the Cu{111} surface by 7,7′,8,8′-tetracyanoquinonedimethane

Kamna, M. M.; Graham, Turnbull; Love, J. Christopher; Weiss, Paul S.

doi:10.1016/s0039-6028(98)00636-0

Cited by 47 publications

(47 citation statements)

References 46 publications

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“…Hence, the unit cell of (3 3 ×12) only can cover a few domain of the adlayer. This result is similar to that obtained in UHV environment [16] .…”

Section: Stm Observationsupporting

confidence: 91%

“…Each unit cell includes two molecules. Thus, the packing density of the adlayer is It is noted that there is a strong electrostatic repulsion between adjacent TCNQ molecules aligned in end-toend or head-to-head packing [16] . This is due to the great electron-withdrawing ability of the nitrile groups of TCNQ.…”

Section: Stm Observationmentioning

confidence: 99%

“…The angle may be different and is influenced by TCNQ-substrate interaction. Weiss et al reported that adjacent TCNQ can be rotated by 90 o from each other on Cu(111) under ultrahigh racuum [16] . This is ascribed to the different molecule-substrate interactions in the two systems.…”

Section: Stm Observationmentioning

confidence: 99%

“…The critical temperature of a metal-insulator transition for thin film is higher than that of bulk crystal, although crystal surface and thin film have similar structures. Weiss et al reported that the ordering of TCNQ is determined by its anistropical perturbation to the local density of Cu(111) electronic state [16] . Previously, we studied TCNQ adsorption and self-assembled adlayer structure on electrode surface in electrolyte solution [17] .…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of TTF, TCNQ and TTF-TCNQ on Au(111): An in situ ECSTM study

Yan

et al. 2009

Sci. China Ser. B-Chem.

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The adsorption and adlayer structures of tetrathiofulvalene (TTF), tetracyanoquinodimethane (TCNQ) and TTF-TCNQ on Au(111) have been systematically investigated by in situ electrochemical scanning tunneling microscopy (ECSTM) and cyclic voltammetry in 0.1 mol⋅L −1 HClO 4 . All the three molecules were found to form well-ordered adlayers in the double-layer potential region of Au(111). For TTF and TCNQ adlayers, (6×3) and (4×7) structures have been observed, respectively. A structural transition was observed on TCNQ adlayer at potential negative of 0.08 V vs. the reversible hydrogen electrode (RHE), and induced a new phase with (3 3 ×12) structure. On the other hand, the charge transfer complex, TTF-TCNQ, self-organized into ordered domains with a lamellar structure different from those of the pure TTF and TCNQ adlayers on Au(111). Its packing arrangement was comparable to surface structures of either single crystal or thin film of TTF-TCNQ. molecular nanostructure, adsorption, TCNQ and TTF, electrochemical STM

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“…Hence, the unit cell of (3 3 ×12) only can cover a few domain of the adlayer. This result is similar to that obtained in UHV environment [16] .…”

Section: Stm Observationsupporting

confidence: 91%

Section: Stm Observationmentioning

confidence: 99%

Section: Stm Observationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption of TTF, TCNQ and TTF-TCNQ on Au(111): An in situ ECSTM study

Yan

et al. 2009

Sci. China Ser. B-Chem.

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show abstract

“…[5,24,25] For example, nucleophilic molecules such as benzene prefer to bind to the electron-poor region at the upper step edges. [26] In contrast, electrophilic molecules such as tetracyanoquinonedimethane (TCNQ) were found to reside at the lower edges of steps [27] where electron density locally increases due to the Smoluchowski effect. Further studies also revealed that the adsorption of atoms and molecules at step sites could be mediated by local electronic structure such as the pseudo-bandgap [28] and the intrinsic dipoles of the step edges.…”

Section: Introductionmentioning

confidence: 99%

Step‐Mediated Anisotropic Adsorption and Condensation of tert‐Butylamine on Cu(111)

et al. 2010

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Scanning tunneling microscopy (STM) combined with density functional theory (DFT) calculations were applied in studying the anisotropic adsorption and condensation of tert-butylamine (t-BA) molecules in the vicinity of the steps on the Cu(111) surface. The preferential adsorption at the upper step edges and uneven distribution of t-BA in the vicinity of the steps illustrate the asymmetric electronic structure of the surface steps. Our observation demonstrates that the adsorption and diffusion of a polar molecule would be significantly mediated by steps on metal surfaces due to the molecule-step interaction and the intermolecular interactions.

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Molecular Self‐Assembly at Solid Surfaces

et al. 2011

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Self‐assembly, the process by which objects initially distributed at random arrange into well‐defined patterns exclusively due to their local mutual interactions without external intervention, is generally accepted to be the most promising method for large‐scale fabrication of functional nanostructures. In particular, the ordering of molecular building‐blocks deposited at solid surfaces is relevant for the performance of many organic electronic and optoelectronic devices, such as organic field‐effect transistors (OFETs), organic light‐emitting diodes (OLEDs) or photovoltaic solar cells. However, the fundamental knowledge on the nature and strength of the intermolecular and molecule‐substrate interactions that govern the ordering of molecular adsorbates is, in many cases, rather scarce. In most cases, the structure and morphology of the organic‐metal interface is not known and it is just assumed to be the same as in the bulk, thereby implicitly neglecting the role of the surface on the assembly. However, this approximation is usually not correct, and the evidence gathered over the last decades points towards an active role of the surface in the assembly, leading to self‐assembled structures that only in a few occasions can be understood by considering just intermolecular interactions in solid or gas phases. In this work we review several examples from our recent research demonstrating the apparently endless variety of ways in which the surface might affect the assembly of organic adsorbates.

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Strong electronic perturbation of the Cu{111} surface by 7,7′,8,8′-tetracyanoquinonedimethane

Cited by 47 publications

References 46 publications

Adsorption of TTF, TCNQ and TTF-TCNQ on Au(111): An in situ ECSTM study

Adsorption of TTF, TCNQ and TTF-TCNQ on Au(111): An in situ ECSTM study

Step‐Mediated Anisotropic Adsorption and Condensation of tert‐Butylamine on Cu(111)

Molecular Self‐Assembly at Solid Surfaces

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