Fabrication of radial superlattices based on different hybrid materials

The fabrication of radial superlattices is demonstrated for three different hybrid material systems. Inherently strained pseudomorphic InGaAs/Fe 3 Si bilayers are rolled‐up to produce radial semiconductor/magnetic heterostructures. Apart from this epitaxially based material system, radial InAlGaAs/GaAs/Cr superlattices are investigated as an example for periodic semiconductor/metallic multilayers. Finally, rolled‐up InGaAs/GaAs/1‐hexadecanethiol layers are studied as a new class of semiconductor/organic short‐period superlattices. The radial superlattices are examined structurally, and particular attention is paid to the interfaces of the periodic hybrid heterostructures. These investigations reveal that, except for the semiconductor/organic hybrid material system, always a new interface layer forms, modifying the initial rolled‐up layer system. The study demonstrates the potential to fabricate periodic layer systems from pure single‐crystalline material, single‐crystalline/poly‐crystalline material as well as single‐crystalline/non‐crystalline material, which cannot be realized by any planar growth techniques. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)