Buckyball-substrate interactions probed by STM and AFM

Sarid, Dror; Chen, T.; Howells, S.; Gallagher, Mary E.; Yi, L.; Lichtenberger, Dennis L.; Nebesney, K.W.; Ray, Charles D.; Huffman, Donald R.; Lamb, Lowell D.

doi:10.1016/0304-3991(92)90331-d

Cited by 19 publications

(5 citation statements)

References 16 publications

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“…∼10 −11 N for a diamond tip scanning a NaCl (100) face at a constant height of 4 Å) and consequently remain difficult to detect. Recently, new composite systems formed of C 60 thin films of ordered monolayers adsorbed on gold substrate have displayed important van der Waals corrugations (∼5 × 10 −10 N) easy to detect in AFM (Sarid et al 1992). Simulations based on an extension of the simplified formulation we have outlined in this section were found to be in good agreement with experimental data (Girard et al 1993).…”

Section: More Realistic Descriptions Based On Atomic Descriptions Of ...supporting

confidence: 61%

The physics of the near-field

Girard¹,

Joachim²,

Gauthier³

2000

Rep. Prog. Phys.

133

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Over the last decade, extensive exploitation of the different kinds of near-fields existing spontaneously or artificially in immediate proximity to the surface of materials has generated a considerable amount of new exciting developments. In this review the main physical properties of these peculiar fields are revisited. In a first stage, following a unified pedagogical model, we recall that the concept of near-field is not restricted to specific research areas, but actually covers numerous domains of contemporary physics (electronics, photonics, interatomic forces, phononics,. . .). To a great extent, it will be shown that it mainly concerns phenomena involving evanescent fields (electronic density surface wave, evanescent light, local electrostatic and magnetic fields,. . .) or localized interatomic or molecular interactions. In fact, the practical exploitation of these waves and local interactions was latent for a long time in physics until the beginning of the 1980s which was marked by the emergence and the success of local probe-based methods (STM, SFM, SNOM). Nowadays, various theoretical approaches and powerful numerical methods well suited to near-field physics are described in the literature. In the second part of this review, different original aspects of the near-field will be discussed with the intent of realizing control and optimization of its properties. In particular, the physics hidden inside the inverse decay length parameter η associated with all near-field concepts will be analysed in detail. This analysis may serve as a general framework for the design of physical or chemical compounds (photonic and electronic) able to control this fundamental parameter. We conclude the review by reconsidering an old and fundamental problem that can be summarized by the question, 'What happens in the near-field interaction zone?'. Actually, this problem has been largely unaddressed in the near-field literature because what is needed in most practical situations is just the transmission coefficient of the whole device. However, when some dissipative elements interact with the near-field, this reasoning appears to be somewhat limited. In order to get more insight into this challenging question, we briefly give a stateof-the-art review of the relation between tunnelling events and energy dissipation inside the near-field.

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Section: More Realistic Descriptions Based On Atomic Descriptions Of ...supporting

confidence: 61%

The physics of the near-field

Girard¹,

Joachim²,

Gauthier³

2000

Rep. Prog. Phys.

133

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“…The best known is the transition to a low-symmetry structure that occurs in solid C 60 upon cooling to below 249 K, 53 which appears to be reflected by the similar transition found in simulation studies of solid-phase C 60 carried out using a full 60-site pairwise additive LJ atom-atom interaction; 54 however, discussion of the low-energy phonon dispersion of the C 60 crystal also requires consideration of the directional dependence of the C 60 -C 60 interaction. Also, it has been found that, although MD simulations using Girifalco's potential correctly predict the minimum-energy geometry of free ͑C 60 ) 13 to be icosahedral, 36 they predict decahedral structures for ͑C 60 ) 14 and ͑C 60 ) 15 , which are capped icosahedra according to calculations with the more accurate atom-atom LJ potential 55 ͓for positively charged ͑C 60 ) N , icosahedral configurations have been inferred from mass spectrometry results for N between 13 and 55; see Ref. 4͔.…”

Section: Phase-change Behaviormentioning

confidence: 99%

Clusters and layers ofC60molecules supported on a graphite substrate

et al. 1997

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Using the models proposed by Girifalco and by Ruoff and Hickman for describing the C 60 -C 60 and C 60 -graphite interactions, respectively, we have carried out a computer simulation study of the structures and phase changes of clusters of C 60 molecules supported on a graphite substrate. We have also analyzed the configurations and binding energies of layers of C 60 molecules deposited on the same substrate. It is predicted that the ground-state structures of the supported clusters consist in monolayerlike hexagonal arrangements parallel to the graphite surface, and that when the temperature is raised the supported fullerene clusters lose C 60 molecules by sublimation before they can attain a liquidlike state.

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“…Fullerenes have been studied extensively because of their unique physical and chemical properties. , The adlayers of fullerenes, such as C 60 and C 70 , have been investigated on the surfaces of semiconductors (Si, GaAs, Ge) and metals (Au, Ag, Cu) using scanning probe microscopy. − With high-resolution scanning tunneling microscopy (STM), it was possible to determine the packing arrangements and even electronic structures of fullerene molecules adsorbed on various surfaces . For example, the monolayer of C 60 molecules adsorbed on Si(111)-(7 × 7) and Si(100)-(2 × 1) surfaces was found by STM to form (7 × 7) and c(4 × 4) structures in ultrahigh vacuum (UHV), respectively.…”

Section: Introductionmentioning

confidence: 99%

Adlayers of C₆₀−C₆₀ and C₆₀−C₇₀ Fullerene Dimers Formed on Au(111) in Benzene Solutions Studied by STM and LEED

et al. 2004

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Scanning tunneling microscopy (STM) and low-energy electron diffraction were used to reveal the structures of ordered adlayers of [2+2]-type C60-C60 fullerene dimer (C120) and C60-C70 cross-dimer (C130) formed on Au(111) by immersingit in abenzene solution containing C120 or C130 molecules. High-resolution STM images clearly showed the packing arrangements and the electronic structures of C120 and C130 on the Au(111) surface in ultrahigh vacuum. The (2 square root3 x 4square root3)R30 degrees, (2square root3 x 5square root3)R30 degrees, and (7 x 7) structures were found for the C120 adlayer on the Au(111) surface, whereas C130 molecules were closely packed on the surface. Each C60 or C70 monomer cage was discerned in the STM image of a C130 molecule.

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Buckyball-substrate interactions probed by STM and AFM

Cited by 19 publications

References 16 publications

The physics of the near-field

The physics of the near-field

Clusters and layers ofC60molecules supported on a graphite substrate

Adlayers of C₆₀−C₆₀ and C₆₀−C₇₀ Fullerene Dimers Formed on Au(111) in Benzene Solutions Studied by STM and LEED

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Buckyball-substrate interactions probed by STM and AFM

Cited by 19 publications

References 16 publications

The physics of the near-field

The physics of the near-field

Clusters and layers ofC60molecules supported on a graphite substrate

Adlayers of C60−C60 and C60−C70 Fullerene Dimers Formed on Au(111) in Benzene Solutions Studied by STM and LEED

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Product

Resources

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Adlayers of C₆₀−C₆₀ and C₆₀−C₇₀ Fullerene Dimers Formed on Au(111) in Benzene Solutions Studied by STM and LEED