Structure and Morphology in Diffusion-Driven Growth of Nanowires: The Case of ZnTe
| Autor: | Ruggero Vigliaturo, David Ferrand, Alberto Artioli, M. den Hertog, Régis André, Joel Cibert, Pamela Rueda-Fonseca, Kuntheak Kheng, Eric Robin, Serge Tatarenko, Edith Bellet-Amalric, Y. Genuist, P. Stepanov |
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| Přispěvatelé: | Nanophysique et Semiconducteurs (NPSC), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Matériaux, Rayonnements, Structure (MRS), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Epitaxie et couches minces (EpiCM), Matériaux, Rayonnements, Structure (NEEL - MRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Epitaxie et couches minces (NEEL- EpiCM), Nanophysique et Semiconducteurs (NEEL - NPSC) |
| Rok vydání: | 2014 |
| Předmět: |
[PHYS]Physics [physics]
HRTEM Materials science Morphology (linguistics) Mechanical Engineering Diffusion Nanowire Analytical chemistry Bioengineering General Chemistry nanowires cristallografia Condensed Matter Physics Cadmium telluride photovoltaics Crystallography General Materials Science Vapor–liquid–solid method High-resolution transmission electron microscopy Layer (electronics) Molecular beam epitaxy |
| Zdroj: | Nano Letters Nano Letters, American Chemical Society, 2014, 14 (4), pp.1877-1883. ⟨10.1021/nl4046476⟩ Nano Letters, 2014, 14 (4), pp.1877-1883. ⟨10.1021/nl4046476⟩ |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl4046476 |
| Popis: | International audience; Gold-catalyzed ZnTe nanowires were grown at low temperature by molecular beam epitaxy on a ZnTe(111) B buffer layer, under different II/VI flux ratios, including with CdTe insertions. High-resolution electron microscopy and energy-dispersive X-ray spectroscopy (EDX) gave information about the crystal structure, polarity, and growth mechanisms. We observe, under stoichiometric conditions, the simultaneous presence of zinc-blende and wurtzite nanowires spread homogeneously on the same sample. Wurtzite nanowires are cylinder-shaped with a pyramidal-structured base. Zinc-blende nanowires are cone-shaped with a crater at their base. Both nanowires and substrate show a Te-ended polarity. Te-rich conditions favor zinc-blende nanowires, while Zn-rich suppress nanowire growth. Using a diffusion-driven growth model, we present a criterion for the existence of a crater or a pyramid at the base of the nanowires. The difference in nanowire morphology indicates lateral growth only for zinc-blende nanowires. The role of the direct impinging flux on the nanowire's sidewall is discussed |
| Databáze: | OpenAIRE |
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