Cooperative mechanism for anchoring highly polar molecules at an ionic surface

Schütte, Jens; Bechstein, Ralf; Rohlfing, Michael; Reichling, Michael; Kühnle, Angelika

doi:10.1103/physrevb.80.205421

Cited by 31 publications

(31 citation statements)

References 44 publications

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“…This configuration results in a total adsorption energy of nearly −0.9 eV, which is about 0.8 eV higher than the optimal adsorption energy. The resulting energy barrier is very close to the thermal energy of a single molecule at room temperature [36]. However, we do not observe any spontaneous switching of the molecules, indicating that spontaneous switching is not possible.…”

Section: Resultssupporting

confidence: 60%

Single-molecule switching with non-contact atomic force microscopy

Schütte¹,

Bechstein²,

Rahe³

et al. 2011

Nanotechnology

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We report upon controlled switching of a single 3,4,9,10-perylene tetracarboxylic diimide derivative molecule on a rutile TiO 2 (110) surface using a non-contact atomic force microscope at room temperature. After submonolayer deposition, the molecules adsorb tilted on the bridging oxygen row. Individual molecules can be manipulated by the atomic force microscope tip in a well-controlled manner. The molecules are switched from one side of the row to the other using a simple approach, taking benefit of the sample tilt and the topography of the titania substrate. From density functional theory investigations we obtain the adsorption energies of different positions of the molecule. These adsorption energies are in very good agreement with our experimental observations.

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Section: Resultssupporting

confidence: 60%

Single-molecule switching with non-contact atomic force microscopy

Schütte¹,

Bechstein²,

Rahe³

et al. 2011

Nanotechnology

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“…One possibility to overcome this barrier is the use of a specific end group which induces an adequate directed dipole moment within the molecule [26,30]. Moreover, high resolution measurements of molecules on insulating surfaces were scarce due to a lack of suitable imaging techniques.…”

Section: Introductionmentioning

confidence: 99%

Oriented growth of porphyrin-based molecular wires on ionic crystals analysed by nc-AFM

Glatzel¹,

Zimmerli²,

Kawai³

et al. 2011

Beilstein J. Nanotechnol.

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SummaryThe growth of molecular assemblies at room temperature on insulating surfaces is one of the main goals in the field of molecular electronics. Recently, the directed growth of porphyrin-based molecular wires on KBr(001) was presented. The molecule–surface interaction associated with a strong dipole moment of the molecules was sufficient to bind them to the surface; while a stabilization of the molecular assemblies was reached due to the intermolecular interaction by π–π binding. Here, we show that the atomic structure of the substrate can control the direction of the wires and consequently, complex molecular assemblies can be formed. The electronic decoupling of the molecules by one or two monolayers of KBr from the Cu(111) substrate is found to be insufficient to enable comparable growth conditions to bulk ionic materials.

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“…This strategy has successfully been applied for identifying a molecule suitable for molecular self-assembly on CaF 2 (111) [82], namely cytosine. This molecule provides a high dipole moment with the local charges being separated by a distance that corresponds to the distance of a pair of oppositely charged ions in the surface.…”

Section: Increasing the Molecule-surface Interactionmentioning

confidence: 98%

“…Prominent insulating support materials for molecular assemblies are stable cleavage planes of alkali halides [48,, such as KBr(001), NaCl(001), KCl(001) or RbCl(001), the (111) cleavage plane of the fluoride CaF 2 [53,[82][83][84][85], oxide surfaces such as MgO(001) or Al 2 O 3 (001) [55] as well as diamond and mica [86] surfaces. Recently, the calcite(104) surface [49,[87][88][89][90][91][92][93][94][95][96][97][98] has gained increasing attention for reasons discussed later.…”

Section: Special Situation On Insulator Surfacesmentioning

confidence: 99%

Self-assembly of Organic Molecules on Insulating Surfaces

Kling

Bechstein

Rahe

et al. 2015

Noncontact Atomic Force Microscopy

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Molecular self-assembly is known to provide a powerful tool for creating functional structures, with the ultimate structure and functionality encoded in the molecular building blocks. Upon molecule deposition onto surfaces, functional structures have been created ranging from defect-free, highly symmetric two-dimensional layers to complex assemblies with dedicated functionality. Especially organic molecules play a key role for molecular self-assembly due to their impressive structural flexibility and the high degree of control by chemical synthesis. Furthermore, the surface itself provides another exciting dimension: adjusting the subtle balance between intermolecular and molecule-surface interactions allows creating a broad variety of structures and explains the great success when confining molecular self-assembly to surfaces. While most of the structures realized so far have been fabricated on metallic substrates, comparatively little is known about molecular self-assembly on insulating surfaces. However, extending the materials basis to insulating substrates is of increasing interest to benefit from self-assembly strategies for emerging technologies such as molecular (opto)electronics. For the latter and further related applications, decoupling of the electronic structure from the underlying substrate is mandatory for the device functionality. Moreover, future applications will require the molecular structure to be stable at room temperature rather than at low temperatures. On insulating support surfaces, however, most attempts to create self-assembled molecular structures at room temperature have been hampered by the weak molecule-surface interactions. Thus, considerable effort has been made to establish means for increasing

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Cooperative mechanism for anchoring highly polar molecules at an ionic surface

Cited by 31 publications

References 44 publications

Single-molecule switching with non-contact atomic force microscopy

Single-molecule switching with non-contact atomic force microscopy

Oriented growth of porphyrin-based molecular wires on ionic crystals analysed by nc-AFM

Self-assembly of Organic Molecules on Insulating Surfaces

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