Zobrazeno 1 - 10
of 136
pro vyhledávání: '"G. Lehmpfuhl"'
Publikováno v:
Acta Crystallographica Section A Foundations of Crystallography. 53:421-425
The importance of thermal diffuse scattering (TDS) in electron diffraction contrast is well known. Experiments involving higher-order Laue-zone (HOLZ) reflections are highly sensitive to variations in the TDS form factors. The Einstein model for TDS
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bdb433d8e442c0d48c91fa7b738a455
https://doi.org/10.1107/s0108767397003176
https://doi.org/10.1107/s0108767397003176
Autor:
G. Lehmpfuhl, Xinhe Bao, Bruno Pettinger, Gerhard Ertl, Martin Muhler, Y. Uchida, Robert Schlögl
Publikováno v:
Catalysis Letters. 32:171-183
Interaction of water with an oxygenated Ag(111) surface leads to an enhancement of the surface restructuring and an activated formation of hydroxyl groups (OH) located stably on the surface and incorporated in the subsurface region, as evidenced by m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32660221dfd4b4d4fd883c4156814c66
https://doi.org/10.1007/bf00806112
https://doi.org/10.1007/bf00806112
Publikováno v:
Surface Science. 296:L1-L7
Nucleation and growth of the Au(100) reconstruction were observed by means of reflection electron microscopy during the phase transition from nonreconstructed to reconstructed surface. In the early stage of the reconstruction nucleation, reconstructe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9dde7eab17b94adbc189593ff736bc64
https://doi.org/10.1016/0039-6028(93)90132-4
https://doi.org/10.1016/0039-6028(93)90132-4
Publikováno v:
Ultramicroscopy. 50:239-243
Reconstruction on a clean Au(111) surface shows complicated contrast in reflection electron microscopic images using many diffracted beams originating from the superstructure. From an analysis of contrast variations with focusing conditions, we deduc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::370cc542da1401a90e6ce292b6fd45dc
https://doi.org/10.1016/0304-3991(93)90192-z
https://doi.org/10.1016/0304-3991(93)90192-z
Autor:
Y. Uchida, G. Lehmpfuhl
Publikováno v:
Ultramicroscopy. 48:445-451
Reflection electron microscopy (REM) allows a very accurate determination of crystallographic directions on a surface. The lack of resolution in REM due to foreshortening is compensated by enhanced sensitivity for measuring angular differences of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a705d40cf383e381da9976d34e503167
https://doi.org/10.1016/0304-3991(93)90120-m
https://doi.org/10.1016/0304-3991(93)90120-m
Publikováno v:
Surface Science. 284:L419-L425
Reconstruction onm Au(100) surfaces has been directly imaged by reflection electron microscopy (REM) with the minimum-exposure technique. Domains containing different superstructures coexist on these surfaces and display certain orientation relations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9ba82bf082b8a285a2dc0432d09a530
https://doi.org/10.1016/0039-6028(93)90519-p
https://doi.org/10.1016/0039-6028(93)90519-p
Publikováno v:
Zeitschrift für Naturforschung A. 47:1187-1190
Scanning tunneling microscopy (STM) of Au(100) was performed in air with a NanoScope II. Regions of 150 x 150 nm with atomatically flat areas fragmented by atomic steps were observed. The reconstructed (100) surface, deformed to a twisted hexagon wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aacac0368ed80540141b8a0516743098
https://doi.org/10.1515/zna-1992-1202
https://doi.org/10.1515/zna-1992-1202
Publikováno v:
Ultramicroscopy. 45:291-298
The reconstruction of the (100) and (111) surfaces on gold could be directly imaged in a conventional electron microscope with a double-tilt heating goniometer in combination with the minimum-exposure technique. On Au(100) superlattice fringes of 1.4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26a758d8514a447dd5fb5b8ac4f035be
https://doi.org/10.1016/0304-3991(92)90140-f
https://doi.org/10.1016/0304-3991(92)90140-f
Publikováno v:
Surface Science. 275:253-264
The structural modifications which are induced by the NO + CO reaction on Pt surfaces were studied using reflection electron microscopy (REM) to image atomic steps. Small single crystal spheres of Pt (diameter ≈ 0.3 mm) were prepared and then expos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e962e657e7089e6286fcd4e18ce2755
https://doi.org/10.1016/0039-6028(92)90798-b
https://doi.org/10.1016/0039-6028(92)90798-b
Publikováno v:
Ultramicroscopy. 41:367-373
Experimental results are compared to computational simulations for convergent beam reflection high energy electron diffraction (CB-RHEED) patterns. Incidence conditions are for the Pt(111) surface close to the [112] zone axis. Particular emphasis is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e10d14f55b0cd20fafa94d24e7145da
https://doi.org/10.1016/0304-3991(92)90216-7
https://doi.org/10.1016/0304-3991(92)90216-7