para-Sexiphenyl thin film growth on Cu(110) and Cu(110)–(2×1)O surfaces

Hu, Ye; Maschek, K.; Sun, Li; Hohage, M.; Zeppenfeld, P.

doi:10.1016/j.susc.2005.11.027

Cited by 36 publications

(35 citation statements)

References 67 publications

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“…19 Figure 1(a) gives an overview of the surface morphology. The first 6P wetting layer consists of flat and planar molecules forming a dense c(22×2) structure, where the molecules are aligned with their long molecular axis in the [1][2][3][4][5][6][7][8][9][10] direction. 10 For sub-monolayer exposures, the molecules repel each other due to Coulomb repulsion when the LUMO is occupied on hybridization.…”

Section: Resultsmentioning

confidence: 99%

Revealing the Buried Metal–Organic Interface: Restructuring of the First Layer by van der Waals Forces

et al. 2015

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With the use of molecular manipulation in a cryogenic scanning tunneling microscope, the structure and rearrangement of sexiphenyl molecules at the buried interface of the organic film with the Cu(110) substrate surface have been revealed. It is shown that a reconstruction of the first monolayer of flat lying molecules occurs due to the van der Waals pressure from subsequent layers. In this rearrangement, additional sexiphenyl molecules are forced into the established complete monolayer and adopt an edge-on configuration. Incorporation of second layer molecules into the first layer is also demonstrated by purposely pushing sexiphenyl molecules with the STM tip. The results indicate that even chemisorbed organic layers at interfaces can be significantly influenced by external stress from van der Waals forces of subsequent layers.

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Section: Resultsmentioning

confidence: 99%

Revealing the Buried Metal–Organic Interface: Restructuring of the First Layer by van der Waals Forces

et al. 2015

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“…Such behaviour is generally ascribed to the passivation role of oxygen, which weakens the interaction between molecules and the substrates and thus impacts on the balance between the film's packing energies and substratemolecule interaction. The general validity can be questioned on ordered oxygen reconstructions on Cu (1 1 0), where the surface is passivated, but the molecules remain lying and have a distinct azimuthal orientation [25,29]. It should be further noted that the oxide surfaces, such as glass, SiO 2 , oxidized Al, where up-right molecular orientation in the grown films is observed, are disordered.…”

Section: Discussionmentioning

confidence: 99%

Sexithiophene films on ordered and disordered TiO2(110) surfaces: Electronic, structural and morphological properties

et al. 2007

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“…8,9 Controlling the thin film growth is a key feature for successful technological implementation of organic semiconductors. 3,[15][16][17] The use of graphene (Gr) as substrate for organic semiconductors is of special significance because it bears potential to replace the transparent indium tin oxide (ITO) as electrode material in organic optoelectronics. 5,10 The molecular orientation with respect to the substrate surface can be tuned by changing the substrate properties.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependent growth morphologies of parahexaphenyl on SiO2 supported exfoliated graphene

Kratzer¹,

Klima²,

Teichert³

et al. 2013

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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Growth condition dependence of morphology and electric properties of ZnO films on sapphire substrates prepared by molecular beam epitaxyThe growth of small conjugated molecules on graphene is of increasing interest, since the latter bears the potential to serve as a transparent electrode for organic solar cells and light emitting diodes. Here, parahexaphenyl thin films have been grown by hot wall epitaxy on SiO 2 supported exfoliated graphene. The arising morphologies-studied by atomic force microscopy-exhibit a strong dependence on deposition temperature. At temperatures from 280 K-333 K, islands consisting of almost upright standing molecules and needles composed from lying molecules coexist on the graphene flake. Between 363 and 423 K solely needles-consisting of lying molecules-are present on the graphene. The needles form well-ordered networks with relative orientation angles of $30 , $60 , and $90 reflecting the symmetry of the graphene substrate.

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para-Sexiphenyl thin film growth on Cu(110) and Cu(110)–(2×1)O surfaces

Cited by 36 publications

References 67 publications

Revealing the Buried Metal–Organic Interface: Restructuring of the First Layer by van der Waals Forces

Revealing the Buried Metal–Organic Interface: Restructuring of the First Layer by van der Waals Forces

Sexithiophene films on ordered and disordered TiO2(110) surfaces: Electronic, structural and morphological properties

Temperature dependent growth morphologies of parahexaphenyl on SiO2 supported exfoliated graphene

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