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- W3163279344 abstract "We have synthesized ∼100 nm diameter GeO2 nanowires by electrodepositing Ge within the nanopores of anodized alumina films on aluminium substrates and then oxidizing in air to form GeO2 nanowires. These nanowires have been imaged with scanning electron microscopy and show excellent control over the diameter which varies by less than 10%. The nanowire length is more variable because of the method used to synthesize them, with the maximum length being about 3 μm. They are vertically standing nanowires encased in an alumina matrix, with the top exposed to air and the bottom in contact with the aluminium substrate. Plasmons from the aluminium couple into the nanowires through the aluminium/nanowire interface and affect both the optical and phonon properties of the nanowires. While the plasmon coupling is expected to increase the photoemission yield, the effect of the coupling on the phonons can be more dramatic. The phonon energies can change as a result of the coupling and new phonon modes can be spawned. The Raman spectra of the nanowires show the usual low wavenumber peaks characteristic of phonons in GeO2 nanowires, but we also observe two high wavenumbers peaks that could be due to phonon-plasmon coupling. This can have a very significant effect on electron transport in these nanowires because the phonons affect the carrier mobility, and also on the optical properties since these phonons mediate the energy relaxation of photoexcited carriers." @default.
- W3163279344 created "2021-05-24" @default.
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- W3163279344 date "2021-04-30" @default.
- W3163279344 modified "2023-09-23" @default.
- W3163279344 title "Low Temperature Growth of Germanium Oxide Nanowires by Template Based Self Assembly and their Raman Characterization" @default.
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- W3163279344 doi "https://doi.org/10.1002/9781119529538.ch5" @default.
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