Architecture of nano‐ and microdimensional building blocks

Abstract

The architecture of nano-and microdimensional building blocks has been investigated within the research group FOR 522 funded by the Deutsche Forschungsgemeinschaft. The main results are summarized in a series of papers following this article. Nanowires have been investigated for III-V-and II-VIsemiconductors and thermoelectric materials. Structures with curvature -screws, spirals, cylindrical tubes, and scrolls -have been achieved using substrate rotation during material deposition under glancing angle and employing strain, either between lattice planes in incommensurable structures or due to lattice mismatch in epitaxial heterostructures. The modification of physical properties due to conformal coverage with thin films, quantum wells, and dielectric Bragg mirrors has been investigated.Schematic geometry of various investigated structures: Nanowires (GaAs, InAs, GaN, ZnO, Bi 2 Te 3 ), spirals (silicon), tubes (cylindrite, a sulfosalt, FePb 3 Sn 4 Sb 2 S 14 ), and scrolls (InGaAs/BGaAs/GaAs), from left to right.

Recent progress in the electrochemical deposition of ZnO nanowires: synthesis approaches and applications

“…At one, each nanowire is an individual element used to build a more complex structures, including urchin-like ZnO architectures; at the other, a set or array of nanowires act as an individual building block. As a result, once a structure with many nanowires is formed, it can later be integrated as a building block into a device [176][177][178][179] .…”