Analysis of surface structures through determination of their composition using STM: Si(100)4×3-In and Si(111)4×1-In reconstructions

The importance of atom layer terraces or steps on platinum surfaces used for catalysis as discussed by Somorjai justifies an extensive investigation of the structure of platinum surfaces through electron microscopy at the atomic resolution level. Experimental and theoretical difficulties complicate the quantitative determination of platinum surface structures but qualitative observation of surface structures on platinum crystals is now possible with good experimental facilities.Ultrathin platinum crystals with nominal 111 orientation are prepared using the procedure reported by Hines without the application of a carbon backing layer. Platinum films with thicknesses of about ten atom layers are strong enough so that they can be mounted on grids to provide ultrathin platinum crystals for examination of surface structure. Crystals as thin as possible are desired to minimize the theoretical difficulties in analyzing image contrast to determine structure. With the current preparation procedures the crystals frequently cover complete openings on a 400 mesh grid.

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Applications of Leed to the Determination of Surface Structures on Metals

Electronic Structure and Reactivity of Metal Surfaces ◽

10.1007/978-1-4684-2796-7_10 ◽

1976 ◽

pp. 289-339 ◽

Cited By ~ 2

Author(s):

S. Andersson

Keyword(s):

Surface Structures

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Fitting dozens of coordinates by LEED: automated determination of complex surface structures

Surface Science ◽

10.1016/0039-6028(93)90817-4 ◽

1993 ◽

Vol 287-288 ◽

pp. 428-431 ◽

Cited By ~ 18

Author(s):

M.A. Van Hove ◽

W. Moritz ◽

H. Over ◽

P.J. Rous ◽

A. Wander ◽

...

Keyword(s):

Complex Surface ◽

Surface Structures ◽

Automated Determination

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DETERMINATION OF COMPLEX SURFACE STRUCTURES WITH LEED

Surface Review and Letters ◽

10.1142/s0218625x97000468 ◽

1997 ◽

Vol 04 (03) ◽

pp. 479-487 ◽

Cited By ~ 12

Author(s):

M. A. VAN HOVE

Keyword(s):

Complex Surface ◽

Surface Structures ◽

Considerable Progress ◽

Structural Determination ◽

Experimental Dataset ◽

The One ◽

Correct Structure

The evolution of the complexity of structural determination attainable with LEED is reviewed. Considerable progress in methodologies and computers has enabled structures as complex as Cu(100) + (4 × 4)- 10Li to be solved in terms of 18 fit parameters. The Si(111)-(7 × 7) structure could now be refined in terms of 100-or-so fit parameters, if a large-enough experimental dataset were available. Big challenges remain: finding a direct or quick way to identify the one qualitatively correct structure; and, to a lesser degree, providing the required size of the experimental dataset.

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Determination of near-surface structures from multi-channel surface wave data using multi-layer perceptron neural network (MLPNN) algorithm

Acta Geophysica ◽

10.2478/s11600-014-0207-8 ◽

2014 ◽

Vol 62 (6) ◽

pp. 1310-1327 ◽

Cited By ~ 1

Author(s):

Çağrı Çaylak ◽

İlknur Kaftan

Keyword(s):

Neural Network ◽

Surface Wave ◽

Surface Structures ◽

Multi Layer Perceptron ◽

Near Surface ◽

Wave Data ◽

Channel Surface ◽

Surface Wave Data

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Determination of irradiation parameters for laser-induced periodic surface structures

Applied Surface Science ◽

10.1016/j.apsusc.2012.09.120 ◽

2013 ◽

Vol 264 ◽

pp. 79-87 ◽

Cited By ~ 37

Author(s):

J. Eichstädt ◽

G.R.B.E. Römer ◽

A.J. Huis in ‘t Veld

Keyword(s):

Surface Structures ◽

Periodic Surface

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Fourier analysis of leed intensities in the determination of surface structures

Surface Science ◽

10.1016/0039-6028(72)90045-3 ◽

1972 ◽

Vol 30 (3) ◽

pp. 553-560 ◽

Cited By ~ 23

Author(s):

T.A. Clarke ◽

R. Mason ◽

M. Tescari

Keyword(s):

Fourier Analysis ◽

Surface Structures

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Cercarial dimensions and surface structures as a tool for species determination of Trichobilharzia spp.

Acta Parasitologica ◽

10.2478/s11686-009-0011-9 ◽

2009 ◽

Vol 54 (1) ◽

Cited By ~ 21

Author(s):

Martin Podhorský ◽

Zuzana Huůzová ◽

Libor Mikeš ◽

Petr Horák

Keyword(s):

Central Europe ◽

Relative Position ◽

Morphological Characteristics ◽

Intraspecific Variability ◽

Surface Structures ◽

The Other ◽

Species Determination ◽

Species Specific ◽

Papillary Pattern

AbstractCercariae of bird schistosomes are traditionally considered to be very similar in their morphological characteristics. In order to solve the problem, we tested some methods which might be suitable for cercarial differentiation. Fourteen isolates of three Trichobilharzia species (T. szidati, T. franki, T. regenti) occurring sympatrically in Central Europe were used. Dimensions of individual cercariae do not represent a useful criterion for identification, because the intraspecific variability exceeds the interspecific one. On the other hand, chaetotaxy appears a promising way for discrimination, although some sensory papillae do not stain sufficiently with silver nitrate. The papillary pattern (i.e. number and relative position of papillae) is specific for all Trichobilharzia species studied by us. Therefore, we compiled an identification key for the three Trichobilharzia species. In addition, we tried to find species-specific surface saccharide epitopes; none of the labeled lectin probes can be used as a speciesspecific marker.

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