Dynamic force microscopy study of 3,4,9,10-perylenetetracarboxylic dianhydride on KBr(001)

Kunstmann, Tobias; Schlarb, Alois K.; Fendrich, M.; Wagner, Thorsten; Möller, R.; Hoffmann, R.

doi:10.1103/physrevb.71.121403

Cited by 108 publications

(117 citation statements)

References 35 publications

Supporting

Mentioning

110

Contrasting

Order By: Relevance

Section: Resultsmentioning

confidence: 99%

“…[32][33][34] However, the adsorption energy landscape for molecular species usually shows only subtle corrugation and already at low coverage (well below a closed monolayer) immediate 2-dimensional domain formation is observed, with molecular close-packing or even aggregation into 3-dimensional structures similar to single crystal insulators. 35,36 Page 5 of 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 7 Here on the c...…”

mentioning

confidence: 99%

See 1 more Smart Citation

Dehalogenation and Coupling of a Polycyclic Hydrocarbon on an Atomically Thin Insulator

et al. 2014

View full text Add to dashboard Cite

Catalytic activity is of pivotal relevance in enabling efficient and selective synthesis processes.Recently, covalent coupling reactions catalyzed by solid metal surfaces opened the rapidly evolving field of on-surface chemical synthesis. Tailored molecular precursors in conjunction with the catalytic activity of the metal substrate allow the synthesis of novel, technologically highly relevant materials such as atomically precise graphene nanoribbons. However, the reaction path on the metal substrate remains unclear in most cases and the intriguing question is how a specific atomic configuration between reactant and catalyst controls the reaction processes. In this study, we cover the metal substrate with a monolayer of hexagonal boron nitride (h-BN), reducing the reactivity of the metal, and gain unique access to atomistic details during the activation of a polyphenylene precursor by sequential dehalogenation and the subsequent coupling to extended oligomers. We use scanning tunneling microscopy (STM) and density functional theory (DFT) to reveal a reaction site anisotropy, induced by the registry mismatch between the precursor and the nano-structured h-BN monolayer. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 3 An atomically thin layer of insulating h-BN is a structurally analogous counterpart for graphene -a single layer of sp 2 -hybridised carbon atoms 1 -matching the graphene lattice almost perfectly with a small mismatch of approx. 2%. Currently, the fabrication of two-dimensional materials follows two main approaches: i) the bottom-up synthesis by substrate supported chemical vapor deposition (CVD) with suitable precursors and ii) the top-down approach by exfoliation. The assembly of graphene/h-BN heterostructures, leading to novel devices or devices with enhanced performance, usually relies on elaborate, sequential transfer processes of the produced layers. 2 The main obstacles are possible misalignment, introduction of defects and contaminations resulting from transferring layers that are just one atom thick. Only recently, the direct CVD growth of graphene on h-BN was demonstrated, offering superior properties. [3][4][5] However, the growth conditions are harsh (long exposure time, high temperatures, several cycles, etc.). Metal substrates are favored, because of their high catalytic activity, 6 but they have the disadvantage that they strongly alter the properties of the grown layers, which therefore cannot be directly used for electronic device fabrication.A common motif in on-surface chemical reactions is the activation of a precursor, the intermittent complex formed between precursor and substrate, and finally the coupling reaction. 7A long-standing question is the impact of the specific atomic configuration between substrate and reactant on the catalytic efficiency and how does the specific atomic arrangement chan...

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Dehalogenation and Coupling of a Polycyclic Hydrocarbon on an Atomically Thin Insulator

et al. 2014

View full text Add to dashboard Cite

show abstract

“…[12][13][14] However, fundamental studies of organic-organic interfaces are still scarce despite of their great interest for molecular electronic applications. 15 Transition-metal dicarboxylate complexes enable the formation of two-dimensional anionic layers and are potential candidates as supramolecular building blocks to design organic layered structures.…”

Section: Introductionmentioning

confidence: 99%

Morphology Change of C₆₀ Islands on Organic Crystals Observed by Atomic Force Microscopy

et al. 2016

View full text Add to dashboard Cite

Organic-organic heterojunctions are nowadays highly regarded materials for lightemitting diodes, field-effect transistors, and photovoltaic cells with the prospect of designing low-cost, flexible, and efficient electronic devices. 1-3 However, the key parameter of optimized heterojunctions relies on the choice of the molecular compounds as well as on the morphology of the organic-organic interface 4 which thus requires fundamental studies. In this work, we investigated the deposition of C 60 molecules at room temperature on an organic layer compound, the salt bis(benzylammonium)bis(oxalato)-cupurate(II), by means of non-contact atomic force microscopy (nc-AFM). Threedimensional molecular islands of C 60 having either triangular or hexagonal shapes are formed on the substrate following a "Volmer-Weber" type of growth. We demonstrate the dynamical reshaping of those C 60 nano-structures under the local action of the AFM tip at room temperature. The dissipated energy is about 75 meV and can be interpreted as the activation energy required for this migration process.1

show abstract

“…This weak interaction severely hampers the formation of substrate-templated, self-assembled structures on prototypical insulating surfaces held at room temperature. Instead, high molecular mobility, 9 clustering at step edges, 10 and molecular bulk crystal formation 11 have been observed frequently. Thus, molecular selfassembly on insulating surfaces requires an increased moleculeÀsurface interaction.…”

mentioning

confidence: 99%

Controlling Molecular Self-Assembly on an Insulating Surface by Rationally Designing an Efficient Anchor Functionality That Maintains Structural Flexibility

et al. 2013

View full text Add to dashboard Cite

Molecular self-assembly on surfaces is dictated by the delicate balance between intermolecular and moleculeÀsurface interactions. For many insulating surfaces, however, the moleculeÀsurface interactions are weak and rather unspecific. Enhancing these interactions, on the other hand, often puts a severe limit on the achievable structural variety. To grasp the full potential of molecular self-assembly on these application-relevant substrates, therefore, requires strategies for anchoring the molecular building blocks toward the surface in a way that maintains flexibility in terms of intermolecular interaction and relative molecule orientation. Here, we report the design of a site-specific anchor functionality that provides strong anchoring toward the surface, resulting in a well-defined adsorption position. At the same time, the anchor does not significantly interfere with the intermolecular interaction, ensuring structural flexibility. We demonstrate the success of this approach with three molecules from the class of shape-persistent oligo(p-benzamide)s adsorbed onto the calcite(10.4) surface. These molecules have the same aromatic backbone with iodine substituents, providing the same basic adsorption mechanism to the surface calcium cations. The backbone is equipped with different functional groups. These have a negligible influence on the molecular adsorption on the surface but significantly change the intermolecular interaction. We show that distinctly different molecular structures are obtained that wet the surface due to the strong linker while maintaining variability in the relative molecular orientation. With this study, we thus provide a versatile strategy for increasing the structural richness in molecular self-assembly on insulating substrates.

show abstract

Dynamic force microscopy study of 3,4,9,10-perylenetetracarboxylic dianhydride on KBr(001)

Cited by 108 publications

References 35 publications

Dehalogenation and Coupling of a Polycyclic Hydrocarbon on an Atomically Thin Insulator

Dehalogenation and Coupling of a Polycyclic Hydrocarbon on an Atomically Thin Insulator

Morphology Change of C₆₀ Islands on Organic Crystals Observed by Atomic Force Microscopy

Controlling Molecular Self-Assembly on an Insulating Surface by Rationally Designing an Efficient Anchor Functionality That Maintains Structural Flexibility

Contact Info

Product

Resources

About

Dynamic force microscopy study of 3,4,9,10-perylenetetracarboxylic dianhydride on KBr(001)

Cited by 108 publications

References 35 publications

Dehalogenation and Coupling of a Polycyclic Hydrocarbon on an Atomically Thin Insulator

Dehalogenation and Coupling of a Polycyclic Hydrocarbon on an Atomically Thin Insulator

Morphology Change of C60 Islands on Organic Crystals Observed by Atomic Force Microscopy

Controlling Molecular Self-Assembly on an Insulating Surface by Rationally Designing an Efficient Anchor Functionality That Maintains Structural Flexibility

Contact Info

Product

Resources

About

Morphology Change of C₆₀ Islands on Organic Crystals Observed by Atomic Force Microscopy