Über ferromagnetische Ferrite: Zur Bildung eines ferromagnetischen Kupfer(II)-ferrits,CuFe2O4, auf nassem Wege

Ohne Zusammenfassung     

Über den Nachweis von frühzeitigen,subtilen Veränderungen der Festkörperoberfläche am Beispiel des V2O5

Ohne Zusammenfassung     

Über die Bildung von röntgenamorphem Eisen(III)-hydroxid durch Luftoxydation von Eisen(II)-hydroxid und Eisen(II)-carbonat

In the presence of certain foreign cations (Ca²⁺, Mg²⁺), amorphous iron(III) hydroxide may be obtained from Fe^II hydroxide or carbonate by air oxidation.     

A study of the adhesion of copper to polyimide foils using surface analytical techniques

Summary The adhesion of chemically and electrochemically deposited copper films on commercial polyimide foils has been studied using scanning electron microscopy, photoelectron spectroscopy, EDX and IR reflection-absorption spectroscopy. Experiments have been carried out on the bare surface and the deposited layers as well as on surfaces prepared by peeling off the deposits. The results show that, at least for the case considered here, poor adhesion is caused by cohesion failure in the foil itself, and that a thin surface layer of the polyimide foil is important for the interface bond. IR spectroscopy was used to study the molecular nature of this surface layer.

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Untersuchung der Adhäsion von Kupfer an Polyimidfolien mit Hilfe von oberflächenanalytischen Verfahren

     

Coherent electron transport through an azobenzene molecule: a light-driven molecular switch

We apply a first-principles computational approach to study a light-sensitive molecular switch. The molecule that comprises the switch can convert between a trans and a cis configuration upon photoexcitation. We find that the conductance of the two isomers varies dramatically, which suggests that this system has potential application as a molecular device. A detailed analysis of the band structure of the metal leads and the local density of states of the system reveals the mechanism of the switch.     

Measurement of the Casimir force between dissimilar metals

The first precise measurement of the Casimir force between dissimilar metals is reported. The attractive force, between a Cu layer evaporated on a microelectromechanical torsional oscillator and an Au layer deposited on an Al2O3 sphere, was measured dynamically with a noise level of 6 fN/sqrt[Hz]. Measurements were performed for separations in the 0.2-2 micro m range. The results agree to better than 1% in the 0.2-0.5 micro m range with a theoretical model that takes into account the finite conductivity and roughness of the two metals. The observed discrepancies, which are much larger than the experimental precision, can be attributed to a lack of a complete characterization of the optical properties of the specific samples used in the experiment.     

Preparation of the first polymeric, chelating proton donors and their use in diastereoselective protonations of chiral enolates

The use of homopolymer 2a of methyl 5-vinylsalicylate, as well as of statistical copolymers 2b-f, in the diastereoselective protonation of the chiral keto-enolate 1 leads to selectivities of up to 93:7 in favor of product 3.