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| Ferrari, A. |
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| Pfattner, Raphael | Brussels |
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Erbe, A.
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Publications (10/10 displayed)
- 2022Engineering gold-platinum core-shell nanoparticles by self-limitation in solutioncitations
- 2022Differences in perchlorate adsorption to azobenzene monolayers on gold formed from thioacetate and thiol precursorscitations
- 2022Terahertz control of photoluminescence emission in few-layer InSecitations
- 2020Electrochemical contrast switching between black and white appearance of gelatin-covered zinc
- 2020Transition Metal-Carbon Bond Enthalpies as Descriptor for the Electrochemical Stability of Transition Metal Carbides in Electrocatalytic Applicationscitations
- 2019Pretreatment with a β-Cyclodextrin-Corrosion Inhibitor Complex Stops an Initiated Corrosion Process on Zinccitations
- 2019Carbon-Sulfur Bond Cleavage During Adsorption of Octadecane Thiol to Copper in Ethanolcitations
- 2018Gradient in defect density of ZnO nanorods grown by cathodic delamination, a corrosion process, leads to end-specific luminescencecitations
- 2016Electrical characterization of two-dimensional materials and their heterostructurescitations
- 2013Electro-codeposition of Modified Silica Colloids and Coppercitations
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article
Gradient in defect density of ZnO nanorods grown by cathodic delamination, a corrosion process, leads to end-specific luminescence
Abstract
ZnO nanorods were grown on a zinc substrate via cathodic delamination of a polymer coating, a tailored corrosion process, at room temperature. A comparison between in situ Raman spectra and post mortem cross sectional analysis by Raman spectroscopy, photoluminescence spectroscopy and scanning electron microscopy shows that in the initial stages of the synthesis, preferentially defect rich ZnO grows. At later stages, crystalline wurtzite ZnO growth dominates. The result is nanorod arrays consisting of nanorods with a large density of point defects in the approximate to 500 nmrange near the zinc substrate, and low defect density in the regions further away from the interface. The growth, which proceeds over several hours, can be interrupted at any time. Large salt concentrations in the corrosive medium increase the growth rate, but also the amount of point defects. The resulting rods show strongly position-dependent luminescence and Raman spectra. Different luminescence can thus be selectively excited, based on the position of excitation.