Surface Analysis of Nanoscale Aluminium and Silicon Films Made by Electrodeposition in Ionic Liquids
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Fabian Bebensee
We present a spectroscopic and microscopic study of nanoscale Al and Si films electrodeposited in water- and air-stable ionic liquids. The choice of cations for such ionic liquids has previously been shown to have a significant effect on the crystallite size of electrodeposited Al or Si films. We found that the deposits are generally uniform, dense, metallic bright, and adherent with crystallite sizes in the nanometer range. The nanocrystalline films were characterized using X-ray Photoelectron Spectroscopy (XPS) and High-Resolution Scanning Electron Microscopy (HRSEM). The XPS results show that the surface of both films is oxidized although the deposition was done in an inert gas glove box. Furthermore our results suggest that as a consequence of oxygen attack the nanoparticles are composed of a metallic core surrounded by a thin oxidic shell. Our XPS study also shows that neither the cation nor the anion of the ionic liquid is entrapped in the deposit. Thus, electrodeposition in ionic liquids delivers pure materials.
© Oldenbourg Wissenschaftsverlag
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Artikel in diesem Heft
- Quantum Thermodynamics of the Spontaneous Approach to the Equilibrium State – Irreversible Exponential Decay of a Discrete Quantum State of Entropy Production into a Continuum
- Preparation and Characterization of Mn0.4NixZn0.6−xFe2O4 Soft Spinel Ferrites for Low and High Frequency Applications by Citrate Precursor Method
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- Mechanistic Studies on the Nucleation of Zinc Sulphide Nanoparticles by Means of XAFS Spectroscopy
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- Computing Activity Coefficients of Binary Lennard-Jones Mixtures by Gibbs-Duhem Integration
- Electronic Spectra of Hydrogen-Bonded Self and Water Complexes of Indazole
