Figure 4: Structural study of alloy nanowires with HRTEM and STEM.
From: Non-equilibrium induction of tin in germanium: towards direct bandgap Ge1−xSnx nanowires
(a) HRTEM image of highly crystalline Ge1−xSnx nanowire (9.2 at.% Sn incorporation). Scale bar, 5 nm. FFT pattern in the inset confirms the crystallinity and growth orientation of the alloy nanowire. (b) Lattice-resolved STEM HAADF image recorded from the core of the alloy nanowire showing the single crystalline nature with an inter-planer spacing of 0.33 nm. Scale bar, 2 nm. (c) High-resolution HAADF image of a seed-nanowire interface (magnified image in the inset) shows abrupt catalyst-nanowire interface with no precipitation of metallic Sn. Scale bar, 2 and 1 nm for the inset.
