<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi mathvariant="normal">C</mml:mi><mml:mn>60</mml:mn></mml:msub></mml:math>on alkali halides: Epitaxy and morphology studied by noncontact AFM

Burke, S. A.; Mativetsky, Jeffrey M.; Fostner, Shawn; Grütter, Peter

doi:10.1103/physrevb.76.035419

Cited by 49 publications

(63 citation statements)

References 44 publications

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“…On the NaCl layers, the growth mode is different from the one observed on the bare metal substrate, owing to the different adsorption energies [19][20][21] : the fullerene molecules form nanocrystals with a minimal height of 2 ML. Furthermore, similarly shaped nanocrystals are obtained after co-deposition of C 60 and C 70 molecules, showing again that on these dielectric substrates the intermolecular interactions prevail over the fullerene-substrate coupling.…”

Section: Introductionmentioning

confidence: 92%

“…In this case, owing to a subtle balance of surface energies and dewetting phenomena [19][20][21] , the fullerene molecules grow in a threedimensional (3D) fashion and form nanocrystals. Similar results have been obtained for other molecules such as bimolecular perylenetetracarboxylic diimide (PTCDI) and BDATB on NaCl on vicinal Au surfaces 22 .…”

Section: Introductionmentioning

confidence: 99%

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Growth and characterization of fullerene nanocrystals on NaCl/Au(111)

et al. 2011

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The growth of fullerene nanocrystals, composed of only C(60), only C(70), or a mixture of both fullerenes, has been investigated by scanning tunneling microscopy (STM). The nanocrystals, formed on a NaCl ultrathin layer partially covering a Au(111) surface, have characteristic truncated-triangular or hexagonal shapes, with lateral size up to 100 nm and a typical height of two to four molecular layers. This growth mode differs considerably from the ones observed on metallic surfaces. STM images with biasdependent submolecular resolution reveal the spatial distribution of the electronic density originating from the molecular orbitals. A comparison of the experimental results with first-principles density functional theory calculations allows us to unambiguously determine the orientation and the nature of individual fullerene molecules in the surface layer of the nanocrystals. Growth and characterization of fullerene nanocrystals on NaCl/Au(111) The growth of fullerene nanocrystals, composed of only C60, only C70, or of a mixture of both fullerenes, has been investigated by Scanning Tunneling Microscopy (STM). The nanocrystals, formed on a NaCl ultrathin layer partially covering a Au(111) surface, have characteristic truncatedtriangular or hexagonal shapes, with lateral size up to 100 nm and a typical height of two to four molecular layers. This growth mode differs considerably from the ones observed on metallic surfaces. STM images with bias-dependent submolecular resolution reveal the spatial distribution of the electronic density originating from the molecular orbitals. A comparison of the experimental results with first principle Density Functional Theory (DFT) calculations allows us to unambiguously determine the orientation and the nature of individual fullerene molecules in the surface layer of the nanocrystals.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Growth and characterization of fullerene nanocrystals on NaCl/Au(111)

et al. 2011

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“…This behaviour is similar to C 60 adsorbed on ionic crystals. [34][35][36][37][38][39]44 However, in contrast to C 60 /ionic crystals, C 60 islands on BNL extend rather in height than in width (approximately 10 times narrower than on ionic crystals). Therefore, the growth is governed by a "Volmer-Weber-like" growth mode and suggests a weaker molecule/surface interaction on BNL than on bulk insulators.…”

Section: Resultsmentioning

confidence: 97%

“…[25][26][27] At room temperature (RT), two dimensional C 60 layers have been observed on metals [28][29][30] and semiconductors [31][32][33] while large three dimensional molecular islands or clusters have been revealed on ionic crystals. [34][35][36][37][38][39] Additionally, the controlled manipulation of C 60 molecules has also been demonstrated through the action of a SPM tip as single molecules [40][41][42][43] or as entire islands. 44 In the present work, we characterize the adsorption of the C 60 molecules on the organic lay- 20 The van der Walls diameter of one C 60 molecule is ∼ 1 nm and is close to 2c.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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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

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“…[14][15][16] Instead, a statistical analysis of island edges reveals two preferred directions. These two directions coincide with the [011] and [011] directions of the C(100)-(2 × 1):H surface.…”

Section: A As-deposited Island Structurementioning

confidence: 99%

Influence of charge transfer doping on the morphologies of C60islands on hydrogenated diamond C(100)-(2×1)

et al. 2012

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The adsorption and island formation of C 60 fullerenes on the hydrogenated C(100)-(2 × 1):H diamond surface is studied using high-resolution noncontact atomic force microscopy in ultrahigh vacuum. At room temperature, C 60 fullerene molecules assemble into monolayer islands, exhibiting a hexagonally close-packed internal structure. Dewetting is observed when raising the substrate temperature above approximately 505 K, resulting in two-layer high islands. In contrast to the monolayer islands, these double-layer islands form extended wetting layers. This peculiar behavior is explained by an increased molecule-substrate binding energy in the case of double-layer islands, which originates from charge transfer doping. Only upon further increasing the substrate temperature to approximately 615 K, the wetting layer desorbs, corresponding to a binding energy of the charge transfer-stabilized film of 1.7 eV.

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C60on alkali halides: Epitaxy and morphology studied by noncontact AFM

Cited by 49 publications

References 44 publications

Growth and characterization of fullerene nanocrystals on NaCl/Au(111)

Growth and characterization of fullerene nanocrystals on NaCl/Au(111)

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

Influence of charge transfer doping on the morphologies of C60islands on hydrogenated diamond C(100)-(2×1)

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C60on alkali halides: Epitaxy and morphology studied by noncontact AFM

Cited by 49 publications

References 44 publications

Growth and characterization of fullerene nanocrystals on NaCl/Au(111)

Growth and characterization of fullerene nanocrystals on NaCl/Au(111)

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

Influence of charge transfer doping on the morphologies of C60islands on hydrogenated diamond C(100)-(2×1)

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