Morphology Control of One-Dimensional Gallium Nitride Nanostructures by Modulating the Crystallinity of Sacrificial Gallium Oxide Templates

• Autorzy: Ko Yun Taek , Park Mijeong , Park Jingyeong , Moon Jaeyun , Choa Yong-Ho , Lee Young-In

Identyfikatory

DOI

10.24425/amm.2021.136366

• Języki publikacji: EN

Abstrakty

EN

In this study, we demonstrated a method of controllably synthesizing one-dimensional nanostructures having a dense or a hollow structure using fibrous sacrificial templates with tunable crystallinity. The fibrous Ga₂O₃ templates were prepared by calcining the polymer/gallium precursor nanofiber synthesized by an electrospinning process, and their crystallinity was varied by controlling the calcination temperature from 500°C to 900°C. GaN nanostructures were transformed by nitriding the Ga₂O₃ nanofibers using NH₃ gas. All of the transformed GaN nanostructures maintained a one-dimensional structure well and exhibited a diameter of about 50 nm, but their morphology was clearly distinguished according to the crystallinity of the templates. When the templates having a relatively low crystallinity were used, the transformed GaN showed a hollow nanostructure, and as the crystallinity increased, GaN was converted into a denser nanostructure. This morphological difference can be explained as being caused by the difference in the diffusion rate of Ga depending on the crystallinity of Ga₂O₃ during the conversion from Ga₂O₃ to GaN. It is expected that this technique will make possible the tubular nanostructure synthesis of nitride functional nanomaterials.

Słowa kluczowe

EN

GaN; nanofiber; nanotube; electrospinning; chemical transformation

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2021
• Tom: Vol. 66, iss. 3
• Strony: 709--712
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr.

Twórcy

autor

Ko Yun Taek

• Hanyang University, Dept. of Advanced Materials Science and Engineering, Ansan 15588, Republic of Korea

• https://orcid.org/0000-0002-9320-092X

autor

Park Mijeong

• Seoul National University of Science And Technology, Dept. of Materials Science and Engineering, Seoul 01811, Republic of Korea

• https://orcid.org/0000-0002-4509-0092

autor

Park Jingyeong

• Hanyang University, Dept. of Advanced Materials Science And Engineering, Ansan 15588, Republic of Korea

• https://orcid.org/0000-0002-2660-9071

autor

Moon Jaeyun

• University of Nevada, Dept. of Mechanical Engineering, Las Vegas, 4505 S. Maryland PKWY Las Vegas, NV 89154, United States

• https://orcid.org/0000-0003-0128-4108

autor

Choa Yong-Ho

• Hanyang University, Dept. of Advanced Materials Science and Engineering, Ansan 15588, Republic of Korea

• https://orcid.org/0000-0002-1254-3593

autor

Lee Young-In

• Seoul National University of Science And Technology, Dept. of Materials Science and Engineering, Seoul 01811, Republic of Korea

• https://orcid.org/0000-0002-9830-8294

Bibliografia

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Uwagi

1. This study was supported by the Research Program funded by the SeoulTech (Seoul National University of Science and Technology).

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).