In situ observation of a Au (111) electrode surface using the X-ray reciprocal-lattice space imaging method

Sakata, Osami; Nakamura, Masashi

doi:10.1016/j.apsusc.2009.01.100

Cited by 7 publications

(2 citation statements)

References 24 publications

(21 reference statements)

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“…For growth in ultra-high vacuum conditions, one should be able to do this by tuning temperature, the metal deposition flux, or an extra density of adatom clusters, [43][44][45] while for chemical growth situations one can tune the electrochemical potential and concentration. [46][47][48] These factors should enable one to select a particular period for the reconstruction, which in turn should enable one to obtain a nanotemplate with a required repeat distance.…”

Section: Evaluation Of R and Comparison With Experimentsmentioning

confidence: 99%

Prediction of reconstruction in heteroepitaxial systems using the Frenkel-Kontorova model

et al. 2011

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Many heteroepitaxial metal-on-metal systems reconstruct into patterns of alternating domains of stacking faults separated by partial misfit dislocations. Here, we use two approaches to investigate the question of whether these can be predicted and controlled: (i) We map the system onto a one-dimensional Frenkel-Kontorova model, and then obtain a simple criterion to determine whether or not the surface will reconstruct; this had earlier been done for homoepitaxial systems, but is here generalized to the heteroepitaxial case. (ii) The two-dimensional Frenkel-Kontorova model is solved numerically by performing quenched molecular dynamics simulations. The necessary microscopic parameters are obtained by performing ab initio density functional theory calculations on the unreconstructed systems. The systems considered are overlayers of Fe, Co, Pt, Ag, Au, and Pb on a Ru(0001) substrate, as well as clean Ru(0001). The predictions of the two approaches agree with one another as well as with experiment. Both the presence and periodicity of the reconstruction are very sensitive to the value of "chemical potential" . Accordingly, we suggest that can be used to tune the periodicity so as to obtain a desired nanotemplate for subsequent growth of self-organized nanostructures.

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Section: Evaluation Of R and Comparison With Experimentsmentioning

confidence: 99%

Prediction of reconstruction in heteroepitaxial systems using the Frenkel-Kontorova model

et al. 2011

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“…The modified method of synchrotron-based reciprocalspace mapping uses a grazing-incidence geometry at a fixed azimuthal angle and produces a reciprocal-space map with a single X-ray exposure. The method was originally proposed for the quick evaluation of NiO nanowires on an ultra-smooth sapphire substrate (Sakata et al, 2004), Bi atomic lines buried in an Si interface (Sakata et al, 2005) and an Au electrode interface in an H 2 SO 4 solution (Sakata & Nakamura, 2009). The basic idea behind the method is that the diffraction conditions of the thin films can be represented by rods, which are perpendicular to the two-dimensional sample.…”

Section: Modified Synchrotron-based Reciprocal-space Mapping At a Fixmentioning

confidence: 99%

Application of synchrotron-based reciprocal-space mapping at a fixed angular position to identification of crystal symmetry of Bi₄Ti₃O₁₂epitaxial thin films

2011

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The crystal structures of Bi4Ti3O12 epitaxial films with thicknesses of 50 and 3 nm were investigated using synchrotron‐based diffraction. Films with (100)/(010) orientations (i.e.a and b domains) were grown on TiO2 (101) single crystals using metal–organic chemical vapor deposition. Synchrotron‐based reciprocal‐space mapping at a fixed angular position was applied to the determination of the crystal symmetry of the films. This method used a grazing‐incidence geometry at a fixed azimuthal angle using 25 keV incident X‐rays, which enabled the generation of a reciprocal‐space map with a single X‐ray exposure. The maps recorded about 120 and 30 diffraction spots from the 50 and 3 nm‐thick samples, respectively. A two‐dimensional 200 × 250 mm detector was used 133 mm downstream from the sample. The results revealed that both Bi4Ti3O12 films had a B1a1 monoclinic structure or a lower crystal symmetry.

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Grazing Incidence X-Ray Diffraction

Sakata

Nakamura

2013

Surface Science Techniques

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In situ observation of a Au (111) electrode surface using the X-ray reciprocal-lattice space imaging method

Cited by 7 publications

References 24 publications

Prediction of reconstruction in heteroepitaxial systems using the Frenkel-Kontorova model

Prediction of reconstruction in heteroepitaxial systems using the Frenkel-Kontorova model

Application of synchrotron-based reciprocal-space mapping at a fixed angular position to identification of crystal symmetry of Bi₄Ti₃O₁₂epitaxial thin films

Grazing Incidence X-Ray Diffraction

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In situ observation of a Au (111) electrode surface using the X-ray reciprocal-lattice space imaging method

Cited by 7 publications

References 24 publications

Prediction of reconstruction in heteroepitaxial systems using the Frenkel-Kontorova model

Prediction of reconstruction in heteroepitaxial systems using the Frenkel-Kontorova model

Application of synchrotron-based reciprocal-space mapping at a fixed angular position to identification of crystal symmetry of Bi4Ti3O12epitaxial thin films

Grazing Incidence X-Ray Diffraction

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Application of synchrotron-based reciprocal-space mapping at a fixed angular position to identification of crystal symmetry of Bi₄Ti₃O₁₂epitaxial thin films