Multiple mechanisms for adsorbate-induced resistivity: oxygen and formate on Cu(100)

Krastev, E. T.; Kühl, D.; Tobin, R. G.

doi:10.1016/s0039-6028(97)00439-1

Cited by 36 publications

(21 citation statements)

References 35 publications

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“…139 Equation (32) is valid only for a "pure" frustrated translation where the adsorbate is assumed to vibrate as a rigid object parallel to a rigid substrate, without changing its height or orientation during the motion; the validity of such an assumption has been discussed by Graham et al 82 The model of diffuse scattering of conduction electrons by the adsorbate can be tested experimentally, by simultaneously recording the dc resistivity change and the IR reflectance change of a thin monocrystalline film upon adsorption. Two previous experiments have shown that the linear dependence between these two quantities holds, 140,141 as expected theoretically. 102,142 Using synchrotron IR spectroscopy, a thorough test has recently been performed 143 (Fig.…”

Section: Low Frequency Modes and Frictionsupporting

confidence: 78%

Molecules at Surfaces and Interfaces Studied Using Vibrational Spectroscopies and Related Techniques

Dumas

Weldon²,

Chabal³

et al. 1999

Surf. Rev. Lett.

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Recent developments in the major experimental vibrational-spectroscopic techniques (i.e. infrared absorption, Raman scattering, high resolution electron loss, helium atom scattering and sum frequency generation) are reviewed and illustrated with selected results. Particular emphasis is given to two important topics which have attracted much attention in recent years: (i) the complex surface reactions taking place on technologically relevant surfaces and interfaces, and (ii) vibrational dynamics with emphasis on energy dissipation at surfaces.

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Section: Low Frequency Modes and Frictionsupporting

confidence: 78%

Molecules at Surfaces and Interfaces Studied Using Vibrational Spectroscopies and Related Techniques

Dumas

Weldon²,

Chabal³

et al. 1999

Surf. Rev. Lett.

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“…The lateral size of the grains is only little below l MFP , which is 34 nm for bulk Cu at 100 K and at = 2000 cm −1 [see Eq. (19)]. The pronounced edges of these grains and the measured height variation in the range of the film thickness indicate an island film little above the percolation threshold where coalescence just has started.…”

Section: Figmentioning

confidence: 99%

“…1 An even dominant role of ⌬n / n B must be concluded from experiments with formic acid exposure of rough copper films where a resistivity change but no reflectivity change was observed. 1,19 According to Eqs. (2) and (3), this corresponds to −⌬n / n ӷ⌬ / .…”

Section: Introductionmentioning

confidence: 99%

Influence of morphology on adsorbate-induced changes in thin-film dynamic conductivity

et al. 2004

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For ultrathin copper films of various morphology we studied adsorbate-induced changes in broadband infrared transmission at normal incidence of light. Smooth Cu films on Si(111) and mesoscopically rough Cu films on KBr(001) were exposed to CO and to C 2 H 4 . We observed significant broadband changes for each of these gases and for both surfaces. Applying a Drude-type model we calculated the optical spectra in accord with the experiment. We find that the effects related to a change in the electronic relaxation rate are weakly influenced by the mesoscopic roughness of the film, while the effects related to charge transfer are strongly enhanced due to such roughness. This paper shows that the real adsorbate-induced changes can be determined for both the homogeneous films and the inhomogeneous films beyond percolation. The increased surface area owing to mesoscopic roughness is merely one contribution to larger adsorbate-induced effects of inhomogeneous films. The other more interesting contribution is due to depolarization in rough metal films that is responsible for strong enhancement of charge transfer effects.

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“…[17] For a macroscopic metal wire, molecule adsorption influences only over a distance of a few angstrom from the surface. However, for an atomically thin metal wire, adsorption of even a single molecule onto the wire is expected to drastically change the conductance, which has been recently studied experimentally by us [4,13] and theoretically by Landman et al [18] The quantum wires used in the experiment were fabricated by the electrochemical method described above.…”

Section: Effects Of Molecular Adsorption On the Conductance Of The Qumentioning

confidence: 99%

Interactions of Molecules with Metallic Quantum Wires

Tao²

2002

Adv. Mater.

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Can you imagine how to detect a single molecule? Techniques, such as fluorescent spectroscopy and scanning probe microscopy have become available for us to probe single molecules. Described in this article is a simple approach based on atomically thin metallic wires. The interactions of even a single molecule with the wire may cause a large change in the conductance and mechanical properties of the wire and can thus be used to detect single molecules.

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Multiple mechanisms for adsorbate-induced resistivity: oxygen and formate on Cu(100)

Cited by 36 publications

References 35 publications

Molecules at Surfaces and Interfaces Studied Using Vibrational Spectroscopies and Related Techniques

Molecules at Surfaces and Interfaces Studied Using Vibrational Spectroscopies and Related Techniques

Influence of morphology on adsorbate-induced changes in thin-film dynamic conductivity

Interactions of Molecules with Metallic Quantum Wires

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