Structure Of Solid Surfaces Research Articles

960. International summer school on the investigation of the surface structures of solids by LEED and complementary methods: B Velicky and I Bartos,Czech J Phys, A 22 (2), 1972, 194–196 ( in Czech).

960. International summer school on the investigation of the surface structures of solids by LEED and complementary methods: B Velicky and I Bartos,Czech J Phys, A 22 (2), 1972, 194–196 ( in Czech).

The electronic structure of solid surfaces: core level excitation techniques: R L Park and J E Houston, (Proc 19th Nat Symp Am Vac Soc) J Vac Sci Technol, 10 (1), Jan.Feb 1973, 176–182

The electronic structure of solid surfaces: core level excitation techniques: R L Park and J E Houston, (Proc 19th Nat Symp Am Vac Soc) J Vac Sci Technol, 10 (1), Jan.Feb 1973, 176–182

LEED – Surface structures of solids, Parts 1 & 2edited by A. Laznička

<i>LEED – Surface structures of solids, Parts 1 &amp; 2</i>edited by A. Laznička

Electronic Characterization of Solid Surfaces

At this point it would be presumptuous to suggest either that we understand very much about the electronic structure of solid surfaces or that we can specify in detail exactly what each of our tools for studying such structure is telling us. I think it is fair to say, however, that FES, UPS, and INS do make it possible for us to determine energy level spectra which can with some confidence be ascribed to the resonances of electrons in surface orbitals. It is true that INS is the more surface-selective of the two electron spectroscopies capable of producing data over at least a 10-ev energy range. We have seen intriguing differences between INS and UPS which, when we come to understand them, will most certainly reveal important characteristics of surface electronic structure and greatly expand our ability to distinguish electronic states in the surface from those in the selvedge. Possibly it is not too much to hope that the combined use of INS and UPS with incidence angle as an independent variable will give us information on the geometrical extent of surface orbitals, as well as the net electrical charge and the electric potential gradient in the region of the surface in which the orbitals lie.

Self-Consistent Electronic Structure of Solid Surfaces

We have developed a method for calculating electron states in the surface region of a semi-infinite solid taking full account of the three-dimensional nature of the lattice potential. The Schr\odinger equation is integrated numerically in a region consisting of the last few atomic layers and the vacuum, and optimally matched to a linear combination of Bloch (pseudo) wave functions in the interior. The potential in the surface region is computed self-consistently from the valence-charge density by solving Poisson's equation, using a local approximation to the exchange and correlation contribution, and representing the cores by a model potential. As an illustration of the practical applicability of the method, the electronic structure of the (100) surface of Na has been calculated.

固体表面の構造

固体表面の構造

The Surface Structure of and Catalysis by Platinum Single Crystal Surfaces

Abstract The importance of the atomic structure of solid surfaces and of adsorbed molecules in heterogeneous catalysis has been advocated by many scientists throughout the years. Early studies by Balandin [l], for example, have suggested the presence of close-packed structures of adsorbed molecules that are intermediates in catalytic reactions. In his view both the atomic structure of the substrate metal surface and the structure of the adsorbed molecules were of primary importance in carrying out certain types of catalytic reactions. In the past, however, the difficulties of determining the atomic structure of catalyst surfaces proved to be almost insurmountable, mostly because of the configuration of the catalyst systems. In the case of metal catalysts most commercial catalyst systems consist of finely dispersed metal particles that are deposited on a high surface area support, most frequently silica or alumina. Even at present the atomic structure of such polydispersed systems cannot be ascertained una...

Mechanisms of doping of nickel oxide and their relation to solid surface structure: P Gravelle et al, Elektron Yavlen Adsorb Kataliz Poluprovod, Mir Moscow, 1969, 192–210 ( in Russian)

Mechanisms of doping of nickel oxide and their relation to solid surface structure: P Gravelle et al, Elektron Yavlen Adsorb Kataliz Poluprovod, Mir Moscow, 1969, 192–210 ( in Russian)

Correlation of structure and function in the oxidative phosphorylation system of submitochondrial particles.

1. After the centrifugation of sonicated heavy beef heart mitochondria at 75, 000 × g for 10 minutes, the supernatant was centrifuged at 144, 000 × g for 30 minutes. The residue was revealed being composed of vesicular inner membrane fragments (ETPH), about 600 to 1000 A. in diameter, showing a morphological homogeneity and a high capacity of oxidative phosphorylation. 2. The Pia ratio of the ETPH in the presence of succinate and of NADH2 was 1.68 and 2.54, respectively, and the corrected Pia value for O2 gas equilibrium was 1. 01 and 1.40, respectively. 3. The capacity of oxidative phosphorylation in ETPH fraction was parallel to the activity of the oligomycin. sensitive ATPase in these fractions. 4. The P/0 ratio of ETPH was decreased to about 50 % by hypotonic treatment. The decrease of P/0 ratio was restored to the level of about 90 % by incubating the ETPH with ATP and BSA. In the instance where the P/0 ratio was low level in the hypotonic medium, the surface structure of ETPH was observed as a swollen form and the head pieces of the elementary particles were clearly observed in contrast to the solid surface structure of ETPH in the isotonic medium. 5. The P/0 ratio of ETPH was decreased to about 60 % by relatively severe sonication, and after separating the residue from the supernatant, that of the residue decreased further to about 40 %. The P/0 ratio of the residue was restored to the level before the separation on the addition of the supernatant containing oligomycin-insensitive ATPase. 6. A discussion was made on the correlation between the surface structure and the activities at terminal phosphorylation step of ETPH after the simple physico-chemical treatment.

Release of radioactive inert gas label from surfaces of solids during hydration and dehydration

The results presented show that both the processes of incorporation of water into, as well as its removal from, the surface structure of solids are accompanied by the release of a fraction of the inert gas label, introduced there by ionic bombardment. The extent and time dependence of the release during surface hydration are dependent on the nature and porosity of the labelled substance. By following the release in the course of thermal dehydration, it is possible to discern initial stages of individual dehydration steps. The method can provide us with new information on changes produced in the structure of the outermost layers of a solid during processes of adsorption and desorption.

Methods of studying the surface structure of solids

Methods of studying the surface structure of solids

Methods of studying the surface structure of solids

Methods of studying the surface structure of solids

The surface structure of solids

The surface structure of solids