Spontaneous local symmetry breaking: a conformational study of glycine on Cu{311}

Understanding the interplay between intrinsic molecular chirality and chirality of the bonding footprint is crucial in exploiting enantioselectivity at surfaces. As such, achiral glycine and chiral alanine are the most obvious candidates if one is to study this interplay on different surfaces. Here, we have investigated the adsorption of glycine on Cu{311} using reflection-absorption infrared spectroscopy, low-energy electron diffraction, temperature-programmed desorption and first-principles density-functional theory. This combination of techniques has allowed us to accurately identify the molecular conformations present under different conditions, and discuss the overlayer structure in the context of the possible bonding footprints. We have observed coverage-dependent local symmetry breaking, with three-point bonded glycinate moieties forming an achiral arrangement at low coverages, and chirality developing with the presence of two-point bonded moieties at high coverages. Comparison with previous work on the self-assembly of simple amino acids on Cu{311} and the structurally-similar Cu{110} surface has allowed us to rationalise the different conditions necessary for the formation of ordered chiral overlayers.

Jornal da UNESP, 2015, ano XXXI, n. 311

Jornal elaborado pela Assessoria de Comunicação e Imprensa da Reitoria da UNESP

Analysis of confinement potential fluctuation and band-gap renormalization effects on excitonic transition in GaAs/AlGaAs multiquantum wells grown on (100) and (311)A GaAs surfaces

The competition between confinement potential fluctuations and band-gap renormalization (BGR) in GaAs/AlxGa1-xAs quantum wells grown on [1 0 0] and [3 1 1]A GaAs substrates is evaluated. The results clearly demonstrate the coexistence of the band-tail states filling related to potential fluctuations and the band-gap renormalization caused by an increase in the density of photogenerated carriers during the photoluminescence (PL) experiments. Both phenomena have strong influence on temperature dependence of the PL-peak energy (E-PL(T)). As the photon density increases, the E-PL can shift to either higher or lower energies, depending on the sample temperature. The temperature at which the displacement changes from a blueshift to a redshift is governed by the magnitude of the potential fluctuations and by the variation of BGR with excitation density. A simple band-tail model with a Gaussian-like distribution of the density of state was used to describe the competition between the band-tail filling and the BGR effects on E-PL(T). (C) 2012 Elsevier B.V. All rights reserved.

Die alten Statuten der jüdischen Gemeinden in Mähren (311 Takkanot) : sammt den nachfolgenden Synodalbeschlüssen

veröffentlicht von G. Wolf

Na 1 Nachlass Max Horkheimer, 12 - Korrespondenzen u.a. mit Carl Dreyfuss (p. I 6, 184-311)

1 Brief von Max Horkheimer an die Zeitschrift The Dog's World, 05.06.1939; 5 Briefe zwischen John Dollard und Max Horkheimer, 1936-1938; 16 Briefe zwischen Josef Doppler und Max Horkheimer, 1934-1939; 2 Briefe zwischen Walter Dorn und Max Horkheimer, 27.09.1941, 24.03.1942; 2 Briefe zwischen Melvyn Douglas und Max Horkheimer, 02.03.1942, 18.12.1941; 34 Briefe zwischen Carl Dreyfuss und Max Horkheimer, 1937-1939; 1 Brief von der National City Bank of New York an den American Consul General London, 15.10.1937; 1 Brief und 2 Entwürfe von Max Horkheimer an den Americal Consul General London, 10.09.1937; 4 Briefe zwischen Walter Dubislav und Max Horkheimer, 1936, 02.10.1936; 3 Briefe zwischen A. E. Duncan-Jones und Max Horkheimer, 1938, 13.04.1938; 1 Brief von E. Duprée an Max Horkheimer, 04.02.1936; 2 Briefe zwischen Bonté Durán und Max Horkheimer, 15.04.1941;

Na 1 Nachlass Max Horkheimer, 46 - Korrespondenzen u.a. mit Manfred Schild (p. I 21. A, 219-311)

3 Briefe zwischen Manfred Schild und Max Horkheimer, 11.04.1946, 1946; 1 Brief vom War Department Washington an Max Horkheimer, 31.08.1943; 1 Brief und Beilage von Max Horkheimer an Anton C. Miller, 16.08.1943; 1 Brief von Max Horkheimer an Charles Perelman, 23.09.1940; 1 Brief von Fred M. Roberts an Edwin F. Borden, 16.04.1940; 1 Brief von Max Horkheimer an Edwin F. Bordin, 15.04.1940; 1 Brief von Fred M. Roberts an das American Consul General, 10.04.1940; 1 Brief von Max Horkheimer an Rudolf Schaar, 08.03.1940; 3 Briefe zwischen E. M. Bernstein und Max Horkheimer, 11.09.1939, 1939; 1 Brief von E. M. berstein an Otto Nathan, 21.06.1939; 1 Brief von Eleanor Slater an Max Horkheimer, 29.03.1939; 2 Briefe zwischen dem Internat Student Service und Franz Neumann, 09.02.1939; 2 Briefe zwsichen George F. Plimpton und Franz F. Neumann, 07.02.1939, 08.02.1939; 2 Briefe zwischen Alfred Grünebaum und Max Horkheimer, 29.11.1938, 13.12.1938; 1 Brief von Max Horkheimer an Robert S. Lynd, 30.04.1938; 1 Brief von Max Horkheimer an Dean Henry P. van Dusen, 30.04.1938; 1 Brief von Dean Henry P. van Dusen an Finley und Benjamin Parker, 25.04.19378; 1 Brief von Robert S. Lynd an Finley und Benjamin Parker, 25.04.1938; 1 Brief von Max Horkheimer an Paul Tillich, 22.04.1938; 1 Brief von Alfred K. Stern an Franz Neumann, 22.04.1938; 1 Brief von Alfred K. Stern an Finley und Benjamin Parker, 22.04.1938;

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 311 - Mitteilung an Professor Hugo von Meltzl über die Unterstützung eines geplanten Schopenhauer-Denkmals in Danzig

u.a.: Erstellung einer Schopenhauer-Büste auf der Basis einer Radierung von Angilbert Göbel; Schopenhauer-Portrait; biographische Angaben Gwinners; Arthur Schopenhauer; Angilbert Göbel; F. A. C. Prestel;

Ms.Ff.F.Stoltze 3. 311 - Brief von Leopold Sonnemann an Lyda Stoltze

Kündigung des Hauses am Grüneburgweg