Characterization of a model Ziegler–Natta catalyst for ethylene polymerization

Abstract

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Local zero-bias anomaly in tunneling spectra of a transition-metal oxide thin film

“…The FMR measurements were done in a UHV compatible electron spin resonance spectrometer operating at 10 GHz which has been described in detail elsewhere. 20 In this setup, low-energy electron diffraction and temperature programmed desorption of CO have been used to prove the formation of a continuous, well-ordered FeO film. FMR spectra were taken at different polar angles between the static magnetic field and the surface normal, and at different temperatures.…”

Interaction of Gold Clusters with Color Centers on MgO(001) Films

“…Details of the experimental setup are described elsewhere. [20] STM experiments were carried out in a custom-built low-temperature STM which has been described in detail elsewhere. [21] For the STM experiments a 3-4 ML thick MgOA C H T U N G T R E N N U N G (001) film was grown on AgA C H T U N G T R E N N U N G (001) by reactive deposition of Mg at 550 K. Au was deposited at 5-8 K. In all cases color centers were produced by electrons with an energy of 100 eV extracted from a filament.…”

Electron trapping in misfit dislocations of MgO thin films

“…20 The STM is equipped with parabolic mirrors and a spectrograph/charge coupled device detector to monitor photon emission from the tunnel junction. The oxide is prepared by Mg deposition onto a sputtered/flashed Mo͑001͒ surface in 1 ϫ 10 −6 mbar O 2 at 300 K. Subsequent annealing to 1100 K leads to the formation of crystalline MgO films, whose surface morphology is governed by the 5% lattice mismatch with the support.…”