Journal
NANOMATERIALS
Volume 11, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/nano11081949
Keywords
GaP; nanowires; molecular beam epitaxy; two-stage growth
Categories
Funding
- Ministry of Science and Higher Education of the Russian Federation [FSRM-2020-0005]
- St. Petersburg State University [75746688]
- Russian Science Foundation [20-72-10192, 20-19-00256]
- Partenariats Hubert Curien Kolmogorov project [43784UJ]
- Indo French Centre for the Promotion of Advanced Research (CEFIPRA) [6008-1]
- Russian Science Foundation [20-72-10192] Funding Source: Russian Science Foundation
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The study demonstrates highly controllable self-catalyzed growth of gallium phosphide (GaP) nanowires on template-free silicon substrates, achieving a high yield of vertical GaP nanowires with control over surface density. The approach also allows for independent control of GaP nanowire length and diameter, providing a new method for designing photonic and electronic devices at the nanoscale.
Tailorable synthesis of III-V semiconductor heterostructures in nanowires (NWs) enables new approaches with respect to designing photonic and electronic devices at the nanoscale. We present a comprehensive study of highly controllable self-catalyzed growth of gallium phosphide (GaP) NWs on template-free silicon (111) substrates by molecular beam epitaxy. We report the approach to form the silicon oxide layer, which reproducibly provides a high yield of vertical GaP NWs and control over the NW surface density without a pre-patterned growth mask. Above that, we present the strategy for controlling both GaP NW length and diameter independently in single- or two-staged self-catalyzed growth. The proposed approach can be extended to other III-V NWs.
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