From understanding to realizing novel III-Sb materials via nanowires
Författare
Summary, in English
Initially direct nucleation of Au-seeded InAs1-xSbx nanowires with a large range of material compositions is explored. Direct growth of nanowires with compositions on the higher end of Sb is made available through semi In-seeded growth. By changing the particle composition the contact angle is improved, and vertical nanowire growth is facilitated.
Thereafter, through template assisted growth, complex multi-segmented selective core-shell structures of InAs-GaSb nanowires are realized. The antimonide shell will exclusively grow on the zinc blende segments of the underlying InAs core, as a result of the higher surface energy of zinc blende sidewalls.
Finally, the thesis successfully examines various templating methods for realizing radial (GaSb), branched (InAs1-xSbx), and axial (1D) (GaSb) wurtzite antimonides for the first time. The mechanisms leading to surmounting wurtzite antimonide formation barriers are explained in detail for each of the specific cases, leading to a thorough
comprehension of the field. These methods, in combination with the possibility to now realize antimonide nanowires directly on substrates, opens doors towards design and synthesis of complex crystal structure engineered nanowires
of pure antimonides.
Publiceringsår
2018-02-27
Språk
Engelska
Fulltext
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Dokumenttyp
Doktorsavhandling
Förlag
Solid State Physics, Lund University
Ämne
- Engineering and Technology
Nyckelord
- Fysicumarkivet A:2018:Namazi
Status
Published
ISBN/ISSN/Övrigt
- ISBN: 978-91-7753-586-7
- ISBN: 978-91-7753-585-0
Försvarsdatum
23 mars 2018
Försvarstid
09:15
Försvarsplats
Lecture hall Rydbergsalen, Fysicum, Professorsgatan 1, Lund University, Faculty of Engineering LTH.
Opponent
- Hannah Joyce (Dr)