Dependence of the adsorption height of graphenelike adsorbates on their dimensionality

Weiß, Simon; Gerbert, David; Stein, Arnulf; Schenk, Alex; Yang, Xiaosheng; Brülke, Christine; Kremring, R.; Feldmann, Sascha; Bocquet, François C.; Gille, Marie; Hecht, Stefan; Sokołowski, M.; Tegeder, Petra; Soubatch, Serguei; Tautz, F. Stefan

doi:10.1103/physrevb.98.075410

Cited by 6 publications

(4 citation statements)

References 51 publications

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“…The results suggested the possibility of a 3D intramolecular distortion, which was not directly accessible via STM. Such a distortion was previously determined using the X-ray standing-wave technique for equally small hydrocarbons, such as perylenetetracarboxylic dianhydride (PTCDA) 24 and pentacene, 25 adsorbed on noble metal surfaces.…”

Section: ■ Resultsmentioning

confidence: 99%

Vertical Intermolecular Electronic Communication in Dibenzo[6]phenacene on Ag(111)

Singh,

Lin,

Yeh

et al. 2024

J. Phys. Chem. C

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Organic electronics are a growing field of research involving the design of devices using organic molecules instead of traditional semiconductor materials. Organic molecules are more versatile and can be tailored to possess the desired electronic, mechanical, optical, and chemical properties. Herein, dibenzo[6]phenacene (DB6P) is addressed, which is an organic molecule with a phenacene skeleton linearly extended with additional benzene rings. Employing scanning tunneling microscopy and spectroscopy, we studied the growth of DB6P on a Ag(111) surface and the emerging electronic states. Molecules grew initially planar on the surface, while the growth of the second layer continued in a stacked configuration with a rotated unit cell. This rotation resulted in a Moiré-like modulation, providing experimental access to the vertical electronic interaction between molecules in different layers. The study findings are important because they could lead to the development of new types of organic electronic devices with improved performance and functionality.

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Section: ■ Resultsmentioning

confidence: 99%

Vertical Intermolecular Electronic Communication in Dibenzo[6]phenacene on Ag(111)

Singh,

Lin,

Yeh

et al. 2024

J. Phys. Chem. C

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“…2c). This is caused by the strong concave distortion of the dehydrogenated bisanthene derivatives, resulting from chemical bonds that form between unsaturated edge carbons and the Cu(110) surface 33 .…”

Section: Resultsmentioning

confidence: 99%

“…The polymerisation of 10,10′-dibromo-9,9′-bianthracene (DBBA, C 28 H 16 Br 2 ) on metal surfaces is used for the on-surface synthesis of graphene nanoribbons 27–31 and graphene 30,32,33 . The reaction is thermally activated and proceeds via dehalogenation and cyclodehydrogenation.…”

Section: Introductionmentioning

confidence: 99%

Identifying surface reaction intermediates with photoemission tomography

et al. 2019

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The determination of reaction pathways and the identification of reaction intermediates are key issues in chemistry. Surface reactions are particularly challenging, since many methods of analytical chemistry are inapplicable at surfaces. Recently, atomic force microscopy has been employed to identify surface reaction intermediates. While providing an excellent insight into the molecular backbone structure, atomic force microscopy is less conclusive about the molecular periphery, where adsorbates tend to react with the substrate. Here we show that photoemission tomography is extremely sensitive to the character of the frontier orbitals. Specifically, hydrogen abstraction at the molecular periphery is easily detected, and the precise nature of the reaction intermediates can be determined. This is illustrated with the thermally induced reaction of dibromo-bianthracene to graphene which is shown to proceed via a fully hydrogenated bisanthene intermediate. We anticipate that photoemission tomography will become a powerful companion to other techniques in the study of surface reaction pathways.

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“…Using angle-resolved photoelectron spectroscopy (ARPES) it was shown that QFMLG formed in this way is n-type doped. However, no information about the vertical structure of this system has been reported, such as the thickness of the Sb layer and its vertical distances to the graphene layer and to the substrate, although such information is highly relevant: The layer distance is an excellent indicator of interaction strength [19,[29][30][31][32][33]. The thickness of the intercalated layer can affect the electronic properties and the possible application of the system, as in the case of two dimensional Ag layers on epitaxial graphene [23].…”

Section: Introductionmentioning

confidence: 99%

Vertical structure of Sb-intercalated quasifreestanding graphene on SiC(0001)

Lin¹,

Wolff²,

Hutter³

et al. 2021

Preprint

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Using the normal incidence x-ray standing wave (NIXSW) technique we have investigated the vertical structure of quasi-freestanding monolayer graphene (QFMLG) obtained by intercalation of antimony under the 6 √ 3 × 6 √ 3 R30°reconstructed graphitized 6H-SiC(0001) surface, also known as zeroth-layer graphene. We found that Sb intercalation decouples the QFMLG very well from the substrate. The distance from the QFMLG to the Sb layer almost equals the expected van der Waals bonding distance of C and Sb. The Sb-intercalation layer itself is mono-atomic, very flat, and located much closer to the substrate, at almost the distance of a covalent Sb-Si bond length. All data is consistent with Sb located on-top of the uppermost Si atoms of the SiC bulk.

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Dependence of the adsorption height of graphenelike adsorbates on their dimensionality

Cited by 6 publications

References 51 publications

Vertical Intermolecular Electronic Communication in Dibenzo[6]phenacene on Ag(111)

Vertical Intermolecular Electronic Communication in Dibenzo[6]phenacene on Ag(111)

Identifying surface reaction intermediates with photoemission tomography

Vertical structure of Sb-intercalated quasifreestanding graphene on SiC(0001)

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