http://hdl.handle.net/20.500.12128/21275
Tytuł: | Room-temperature plasticity of a nanosized GaN crystal |
Autor: | Fujikane, Masaki Nagao, Shijo Chrobak, Dariusz Yokogawa, Toshiya Nowak, Roman |
Słowa kluczowe: | GaN nanocrystals; nanoscale compression; plasticity; ultrahigh voltage electron microscopy; ab initio calculations; MD-simulations |
Data wydania: | 2021 |
Źródło: | Nano Letters, 2021, iss. 15, s. 6425-6431 |
Abstrakt: | GaN wurtzite crystal is commonly regarded as eminently brittle. However, our research demonstrates that nanodeconfined GaN compressed along the M direction begins to exhibit room-temperature plasticity, yielding a dislocation-free structure despite the occurrence of considerable, irreversible deformation. Our interest in M-oriented, strained GaN nanoobjects was sparked by the results of first-principles bandgap calculations, whereas subsequent nanomechanical tests and ultrahigh-voltage (1250 kV) transmission electron microscopy observations confirmed the authenticity of the phenomenon. Moreover, identical experiments along the C direction produced only a quasi-brittle response. Precisely how this happens is demonstrated by molecular dynamics simulations of the deformation of the C- and M-oriented GaN frustum, which mirror our nanopillar crystals. |
URI: | http://hdl.handle.net/20.500.12128/21275 |
DOI: | 10.1021/acs.nanolett.1c00773 |
ISSN: | 1530-6984 1530-6992 |
Pojawia się w kolekcji: | Artykuły (WNŚiT) |
Plik | Opis | Rozmiar | Format | |
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Fujikane_Room_temperature_plasticity.pdf | 4,11 MB | Adobe PDF | Przejrzyj / Otwórz |
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