Abschlussarbeiten - Master
Substrate Optimization for the Growth of Thin Nanowires
Art der Abschlussarbeit
Master
Autoren
- Rasarasan, Thamizharasi
Betreuer
- Prof. Dr. rer. nat. Johann Wolfgang Bartha
Weitere Betreuer
Prof. E. Bakkers, Dr. C. Car (TU Eindoven)
Abstract
Nanowires in general exhibit great advantages over thin film. Particularly, the thin nanowires are more important to obtain defect free core/shell heterostructure, to reduce thermal conductivity, to increase quantum confinement effect and more. In top down approach, defect-free high quality heterostructure nanowire cannot be obtained. Whereas, bottom up approach offers high surface quality nanowires with better strain relaxation mechanism and the ability to alter crystal structures. In order to obtain ultra-thin nanowires, the substrate processing steps must be optimised. In this thesis, different silicon nitride thickness, resists, doses and etching mechanisms were carried out. Initially, substrate processing steps are optimised for thin Au catalysed VLS grown nanowires. Nanowires as thin as 18 nm are obtained for Au catalysed growth. This template was used to grow catalyst free selective area nanowires.
Schlagwörter
-
Berichtsjahr
2017