14 October 2004 Quantum confinement effects in germanium nanowires studied by electron energy loss spectroscopy (EELS)
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Abstract
Organic monolayer-coated single-crystal germanium (Ge) nanowires ranging from 8 to 80 nm in diameter were synthesized by the gold nanocrystal-seeded supercritical-fluid-liquid-solid (SFLS) approach and studied by energy loss spectroscopy (ELS) on a scanning transmission electron microscope (STEM). Energy losses from a ~0.5 nm diameter electron probe due to scattering from volume and surface plasmons vary with respect to the probe position relative to the nanowire surface, and the volume plasmon energy increases with decreasing diameter for nanowires narrower than 24 nm. Below 24 nm, the organic monolayer-coated nanowires also exhibit size-dependent Ge 3d core ionization spectra that shift to higher energy with reduced diameter that are independent of probe position relative to the surface.
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Tobias Hanrath, Tobias Hanrath, Brian A. Korgel, Brian A. Korgel, } "Quantum confinement effects in germanium nanowires studied by electron energy loss spectroscopy (EELS)", Proc. SPIE 5513, Physical Chemistry of Interfaces and Nanomaterials III, (14 October 2004); doi: 10.1117/12.560276; https://doi.org/10.1117/12.560276
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