Self-assembly of Rubrene on Copper Surfaces

Miwa, Jill A.; Cicoira, Fabio; Bedwani, Stéphane; Lipton‐Duffin, Josh; Perepichka, Dmitrii F.; Rochefort, Alain; Rosei, Federico

doi:10.1021/jp802762q

Cited by 34 publications

(31 citation statements)

References 67 publications

(121 reference statements)

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“…9 This means that, in order to realize the crystallinity of rubrene molecules in monolayer regime, it requires additional energy ~205 meV to stabilize the planarization of twisted backbone of rubrene molecule. One may ask where this energy comes from?…”

Section: Resultsmentioning

confidence: 99%

“…1(a), while the rubrene crystals adopt a planar tetracene backbone without any chirality. 9 Recently there has been tremendous effort in growing rubrene crystalline thin films on various substrates. Nevertheless, a lot of self-assembled monolayer (SAM) or supramolecular structures have been obtained on noble-metal substrates like Au, [10][11][12][13][14] …”

Section: Introductionmentioning

confidence: 99%

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Strain-driven formation of rubrene crystalline films on Bi(001)

Meng

Xiong

et al. 2011

Phys. Rev. B

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We report the formation of rubrene crystalline films on Bi(001) substrate starting from the very first layer. With coverage increasing, rubrene shows a structural evolution from self-assembled monolayer to a composite phase, which consists of rubrene crystalline domains and self-assembled domain walls. In particular, Kurdjunov-Sachs (KS) rotational epitaxy has been found in rubrene crystalline domains, which reveal large compressive strains.Further deposition of rubrene leads to a layer-by-layer growth of crystalline films up to the forth layer. The driving force for rubrene crystallinity in monolayer regime has been attributed to the anisotropic strains generated in KS rotation epitaxy.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strain-driven formation of rubrene crystalline films on Bi(001)

Meng

Xiong

et al. 2011

Phys. Rev. B

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“…A Rub molecule can exist in two different structures known as twisted (D2) and planar (D1) isomers. The planar isomer is more stable in the crystal phase, since it favors the more dense packing of Rub molecules, while the twisted isomer is energetically more favorable for free molecules and those adsorbed on dielectric surfaces [11][12]. The chemical structure of Rub planar and twisted isomers and two possible geometrical isomers of Alq3, meridional (C1 symmetry) and facial (C3 symmetry) forms, are shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Optical Properties and Stability of Bilayer Rubrene-Alq3 Films Fabricated by Vacuum Deposition

et al. 2018

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We report on the optical and structural characterization of the two-component vacuum deposited (VD) rubrene (Rub)-Alq3 films. As is known, Rub-doped OLED active materials demonstrate both promising electroluminescence and transistor characteristics. However, in terms of operational lifetime, the Rub practical application in basic devices has a few drawbacks related to its chemical instability. Our main attention was focused on the role of the Alq3 coverage and the isomeric transformation of a Rub molecule on its chemical stability in these structures. By monitoring the evolution of PL emission in time, we found that the Rub degradation in Rub-Alq3 films is slower than that in vacuum-deposited Rub layers. These results demonstrate that the deposition of an Alq3 layer can be a way to enhance the stability of Rub to the photo-oxidation in optoelectronic devices. The Rub amorphous film crystallization at elevated temperatures in open air was observed for the first time.K e y w o r d s: rubrene, Alq3, oxidized rubrene, vacuum deposition, thin films, FTIR spectra, photoluminescence.

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“…The self-assembly of rubrene on pristine low index copper surfaces ((110) and (001)) will be discussed in more detail in a forthcoming paper. 51 Self-Assembly of Rubrene on the O-Cu Template. An STM image of the O-Cu nanotemplate used for this study is shown in Figure 3a.…”

Section: Self-assembly Of Rubrene On Pristine Cu(110)mentioning

confidence: 99%

“…Investigations on other Cu surfaces as well as density functional calculations are in progress to clarify this issue. 51 A tentative model for the adsorption geometry is illustrated in the upper portion of Figure 4a. The molecules assemble side by side into a tightly packed structure forming rows running in the same direction as the O-Cu stripes (i.e., the [001] direction of the pristine Cu surface).…”

Section: Self-assembly Of Rubrene On Pristine Cu(110)mentioning

confidence: 99%

Molecular Assembly of Rubrene on a Metal/Metal Oxide Nanotemplate

et al. 2007

Self Cite

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We investigated the adsorption properties and self-assembly of rubrene molecules on the copper oxide nanotemplate formed by high-temperature exposure of Cu (110) to molecular oxygen. Using high-resolution scanning tunneling microscopy under ultrahigh-vacuum conditions, we observed a complex variety of selfassembled motifs, driven by competing effects such as the chemical affinity between the organic molecule and the surface, surface coverage, and spatial confinement of the rubrene molecules within the rows of the template.

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Self-assembly of Rubrene on Copper Surfaces

Cited by 34 publications

References 67 publications

Strain-driven formation of rubrene crystalline films on Bi(001)

Strain-driven formation of rubrene crystalline films on Bi(001)

Optical Properties and Stability of Bilayer Rubrene-Alq3 Films Fabricated by Vacuum Deposition

Molecular Assembly of Rubrene on a Metal/Metal Oxide Nanotemplate

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