Dynamics of a nanoparticle rotating in the near field of a heated solid surface

General expressions for the force of attraction to the surface and the projections of torque exerted on a particle rotating near a solid surface at an arbitrary orientation of the angular velocity vector have been found. It has been shown that the particle decelerates over time and the angular velocity vector tends to be oriented perpendicularly to the surface at any initial conditions.

     

Evidence for the short-period oscillations in spin-resolved photoemission of thin Cr(110) films

The spin-resolved electronic structure of thin Cr overlayers on top of the Fe(110) surface was investigated by means of spin- and angle-resolved photoelectron spectroscopy. The initial fast drop of photoelectron spin-polarization at the Fermi level, followed by weak oscillatory behavior with the period of about 2 ML, can give an evidence for the first time spectroscopic observation of the short period oscillations in (110)-oriented thin Cr films.     

Determination of copper(II) and zinc(II) in blood by spectrophotometry and polarographic methods

Summary Determination of copper with picramine R and of copper and zinc by amalgam polarographic technique with accumulation, have been developed for samples of 0.2–1 ml of blood.

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Zusammenfassung Die Bestimmung von Kupfer mit Pikramin R und von Kupfer und Zink durch Polarographie nach elektrolytischer Anreicherung als Amalgam aus 0,2 bis 1 ml Blut wurde ausgearbeitet.

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Reference solution 1 contains (g/ml): 900 NaCl, 400 NaHPO₄, 200 KC1, 100 CaCl₂, 10 NaHCO₃, 6 Zn²⁺, 1.5 Cu²⁺, 1 AI³⁺+, 0.5 Ti⁴⁺, 0.2 Mn²⁺, 0.1 Pb²⁺, 0.06 Co²⁺, 0.05 Ni²⁺.Reference solution 2 is the same plus Fe³⁺, 500 g/ml.     

Tautomerism of 2,2′-dihydroxyazobenzene

Conclusions A study of the structure of 2,2-dihydroxyazobenzene employing the methods of IR spectroscopy and LCAO MO as the Pariser-Parr approximation disclosed that this compound exists as a mixture of two tautomeric forms, the stability of which is approximately the same.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1334–1336, June, 1973.     

Dynamic fluctuation electromagnetic interaction of a nonrelativistic quadrupole particle with a flat surface

Within the framework of the nonrelativistic fluctuation electromagnetic theory, relationships for the quadrupole-quadrupole contribution to the tangential and normal components of the force acting on a particle moving parallel to the polarizing surface are derived for the first time. Consideration is given to the cases when the particle possesses a permanent quadrupole moment or a fluctuation quadrupole moment and the surface is characterized by a local dielectric function.     

High-resolution Russian–German beamline at BESSY

The superior performance of the high-resolution Russian–German bending-magnet beamline at BESSY is demonstrated by measuring photon flux and photoionization spectra in the spectral region of the 2,-1₃ resonance of doubly-excited He as well as at the 1s absorption thresholds of gas-phase N₂, O₂, and Ne. It is shown that even after 6 years of successful operation, the beamline remains to provide a solid basis for a further development of the Russian–German scientific cooperation in the field of applications of synchrotron radiation.     

Preparation of the subnanometer thick epitaxial Al2O3(0001) layers on Fe(110) for magnetic tunnel junctions

Growth as well as crystallographic and electronic properties of thin AlO_x layers on Fe(110) were studied by means of low-energy electron diffraction and Auger-electron spectroscopy. Al layers of different thickness were deposited on Fe(110) and successfully oxidized to AlO_x. The step-by-step oxidation of thin Al layers at room temperature leads to the formation of amorphous AlO_x on top of the Fe(110) surface. A subsequent annealing at 250 °C of the oxidized 7-Å thick Al layer results in the formation of a well-ordered Al₂O₃(0001) layer on the Fe(110) surface.