Deterministic One-to-One Synthesis of Germanium Nanowires and Individual Gold Nanoseed Patterning for Aligned Nanowire Arrays

摘要

Germanium nanowires (GeNWs) have attracted much attention in recent years[1]-[9] owing to the advanced electrical properties of germanium, such as high carrier mobilities,[10] and the facile chemical synthesis of single-crystal GeNWs at relatively low temperatures (well below 400 °C).[5] Various synthetic methods for crystalline GeNWs that use gold nanoparticles as seeds have been reported and include chemical vapor deposition (CVD),[5], [8], [9], [11] physical vapor deposition (PVD),[2], [3] and solvothermal reactions.[1], [4] Nevertheless, one-to-one growth (1-1 growth) in which each gold particle seed produces one nanowire[12] and the chemistry needed for such growth is not well-established for GeNWs. To achieve this goal is important for the deterministic synthesis of nanowires with controlled yield, size, growth locations, and orientations.