Pd Deposition onto the Thermally Roughened Cu(110) Surface

Blanchard, N. P.; Martin, D. S.; Davarpanah, Abdol Mahmood; Barrett, Steve; Weightman, P.

doi:10.1002/1521-396x(200112)188:4<1505::aid-pssa1505>3.0.co;2-8

Cited by 10 publications

(5 citation statements)

References 22 publications

(41 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Investigating the formation of surface alloys is of fundamental interest, and their properties are of importance in technological applications-in particular the tailoring of metallic surfaces to advance the understanding and eventual control of catalytic processes. Two examples of surface alloys that have been investigated by the combination of RAS and STM are Pd/Cu (110) [316,317] and Pd/Au(110) [86]. For Pd deposited onto Cu (110), a difference in reconstruction of the alloyed surface layer was observed, depending on the initial Cu surface morphology [316,317].…”

Section: Metal Deposition: Magnetism Catalysis and Surface Alloysmentioning

confidence: 99%

“…Two examples of surface alloys that have been investigated by the combination of RAS and STM are Pd/Cu (110) [316,317] and Pd/Au(110) [86]. For Pd deposited onto Cu (110), a difference in reconstruction of the alloyed surface layer was observed, depending on the initial Cu surface morphology [316,317]. RA spectra taken following the deposition of Pd onto the Au( 110)-(1 × 2) surface are shown in figure 35 together with corresponding STM results [86].…”

Section: Metal Deposition: Magnetism Catalysis and Surface Alloysmentioning

confidence: 99%

See 1 more Smart Citation

Reflection anisotropy spectroscopy

et al. 2005

View full text Add to dashboard Cite

Reflection anisotropy spectroscopy (RAS) is a non-destructive optical probe of surfaces that is capable of operation within a wide range of environments. In this review we trace the development of RAS from its origins in the 1980s as a probe of semiconductor surfaces and semiconductor growth through to the present where it is emerging as a powerful addition to the wide range of existing ultra-high vacuum (UHV) surface science techniques. The principles, instrumentation and theoretical considerations of RAS are discussed. The recent progress in the application of RAS to investigate phenomena at metal surfaces is reviewed, and applications in fields including electrochemistry, molecular assembly, liquid crystal device fabrication and remote stress sensing are discussed. We show that the experimental study of relatively simple surfaces combined with continuing progress in the theoretical description of surface optics promises to unlock the full potential of RAS. This provides a firm foundation for the application of the technique to the challenging fields of ambient, high pressure and liquid environments. It is in these environments that RAS has a clear advantage over UHVbased probes for investigating surface phenomena, and its surface sensitivity, ability to monitor macroscopic areas and rapidity of response make it an ideal complement to scanning probe techniques which can also operate in such environments.

show abstract

Section: Metal Deposition: Magnetism Catalysis and Surface Alloysmentioning

confidence: 99%

Section: Metal Deposition: Magnetism Catalysis and Surface Alloysmentioning

confidence: 99%

Reflection anisotropy spectroscopy

et al. 2005

View full text Add to dashboard Cite

show abstract

“…The spectrum is in good agreement with previously measured spectra from this stepped surface. 14,18,[28][29][30][31] The shoulder profile centered at 2.2 eV has been well simulated 18,23 by the surface local-field model 32 that is based upon the polarization of atomic dipoles at the ͑110͒ surface. The RA spectrum of the stepped surface is different from that obtained from Cu͑110͒ surfaces prepared via conventional ion bombardment-annealing cleaning cycles, where an intense RAS peak is observed at ϳ2.1 eV, 8,18,23 shown by the solid line in Fig.…”

Section: B Ras In the Region 15-30 Evmentioning

confidence: 99%

Effects of ion bombardment on the optical and electronic properties of Cu(110)

2005

Self Cite

View full text Add to dashboard Cite

We investigate changes in the optical and electronic properties of Cu͑110͒ upon Ar ion bombardment at room temperature using reflectance anisotropy spectroscopy ͑RAS͒. Using a stepped Cu͑110͒ surface of narrow terraces where transitions between surface states near E F at the Ȳ point do not occur, we observe the return of these transitions upon ion bombardment through the emergence of a RAS peak at 2.08 eV. We relate the return of this RAS peak to a repopulation of the lower-lying surface state on the larger terraces produced by ion bombardment and room-temperature annealing. Further bombardment increases the density of surface vacancies and results in the disruption of the upper surface state leading to a reduction in intensity of the 2.08 eV RAS peak. Changes upon bombardment in the RA response around 4 eV-a region dominated by transitions near the L point in bulk Cu-are simulated in terms of a three-phase model of vacuum, surface, and bulk where the dielectric anisotropy of the surface layer is modeled using the energy derivative of the bulk dielectric function. We conclude that the RA response of Cu͑110͒ is highly sensitive to the occupancy of surface states and the presence of vacancies.

show abstract

“…When RAS is applied to a cubic crystal of isotropic bulk optical response, the RA arises in the surface region making RAS a surface sensitive optical technique. RAS has been used to investigate the bi-metallic surface alloys Pd/Cu(110) [17,18] and Pd/Au(110) [19]. In the work presented here significant changes in the RA response of the Cu(110) surface are observed upon alloying with Si, and with the growth of anisotropic 1D Si chains on top of the surface alloy.…”

Section: Introductionmentioning

confidence: 99%

Optical reflectance anisotropy of the Si/Cu(110) surface alloy

Martin¹

2009

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Measurements of the optical reflectance anisotropy (RA) of the Si/Cu(110)-c(2 × 2) surface alloy are reported. Significant changes in the RA response of Cu(110) are observed upon the formation of the surface alloy, and with the growth of one-dimensional (1D) anisotropic Si chains on top of the surface alloy. The transitions between the surface states near the Fermi level (E(F)) at the [Formula: see text] symmetry point on the clean Cu(110) surface are no longer observed in RA spectra of 0.3 ML Si coverage. Peaks in RA spectra arising from transitions between surface-modified bands near E(F) at the L point are found to be sensitive to the formation of the surface alloy. The RA response of the c(2 × 2) surface alloy from 3.0 to 5.5 eV is simulated using a simple three-phase derivative model. The addition of an overlayer phase to this model makes it possible to simulate higher coverage Si/Cu RA profiles where 1D Si chains cover the surface alloy. The success of the models, in which discrete phases contribute to the RA response, supports the view that the Si chains grow on top of the intact c(2 × 2) alloy. Depositing between 1.2 and 1.8 ML Si results in no change to the RA spectroscopy signal, indicating that the signal remains sensitive to the covered alloy interface.

show abstract

Pd Deposition onto the Thermally Roughened Cu(110) Surface

Cited by 10 publications

References 22 publications

Reflection anisotropy spectroscopy

Reflection anisotropy spectroscopy

Effects of ion bombardment on the optical and electronic properties of Cu(110)

Optical reflectance anisotropy of the Si/Cu(110) surface alloy

Contact Info

Product

Resources

About