利用化学气相沉积可控合成磁性二维非层状硫化钴纳米晶

IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Small Pub Date : 2024-12-23 DOI:10.1002/smll.202406202
Jimin Jang, Euihoon Jeong, Minwoong Joe, Tobiloba Gabriel Abraham, Younggeun Jang, Jongchan Yoon, Jaegu Song, Zonghoon Lee, Tuson Park, Youngchan Kim, Changgu Lee
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引用次数: 0

摘要

在二维(2D)非层状过渡金属硫族化合物(tmc)中,硫化钴因其不同的结构相和独特的性质而备受关注。tmc独特的磁性使其在未来自旋电子器件中的潜在应用引起了人们的极大兴趣。此外,它们的高导电性、大比表面积和丰富的活性位点也引起了催化领域的关注。然而,相可控的二维非层状硫化钴纳米晶体的合成仍然具有挑战性。在本研究中,报告了一种使用常压化学气相沉积(APCVD)在绝缘衬底上合成二维非层状硫化钴纳米晶体的方法。通过控制生长温度,实现了从黄铁矿结构的CoS2到立方Co3S4和六方CoS的纳米晶相转变。磁输运研究揭示了CoS2在低于居里温度时的金属和铁磁性行为。此外,基于Co3S4和CoS的器件的电学测量显示出传统的金属行为,包括依赖于温度和磁场的普通霍尔效应。这些发现证明了APCVD在合成具有可控相的高质量二维非层状硫化钴纳米晶体方面的潜力,为其在自旋电子学和催化方面的应用铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Controllable Synthesis of Magnetic 2D Non-Layered Cobalt Sulfide Nanocrystals Using Chemical Vapor Deposition

Controllable Synthesis of Magnetic 2D Non-Layered Cobalt Sulfide Nanocrystals Using Chemical Vapor Deposition

Controllable Synthesis of Magnetic 2D Non-Layered Cobalt Sulfide Nanocrystals Using Chemical Vapor Deposition

Among 2-dimensional (2D) non-layered transition-metal chalcogenides (TMCs), cobalt sulfides are highly interesting because of their diverse structural phases and unique properties. The unique magnetic properties of TMCs have generated significant interest in their potential applications in future spintronic devices. In addition, their high conductivity, large specific surface area, and abundant active sites have attracted attention in the field of catalysis. However, the synthesis of phase-controllable 2D non-layered cobalt sulfide nanocrystals remains challenging. In the present study, a method is reported in which ambient-pressure chemical vapor deposition (APCVD) is used to synthesize 2D non-layered cobalt sulfide nanocrystals on insulating substrates. By controlling the growth temperature, the transition of nanocrystal phases from pyrite-structured CoS2 to cubic Co3S4 and hexagonal CoS is achieved. Magnetotransport studies revealed metallic and ferromagnetic behaviors at temperatures below the Curie temperature for CoS2. In addition, electrical measurements of Co3S4- and CoS-based devices showed conventional metallic behaviors, including temperature- and magnetic field-dependent ordinary Hall effects. These findings demonstrate the potential of APCVD for synthesizing high-quality 2D non-layered cobalt sulfide nanocrystals with controllable phases, paving the way for their application in spintronics and catalysis.

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来源期刊
Small
Small 工程技术-材料科学:综合
CiteScore
17.70
自引率
3.80%
发文量
1830
审稿时长
2.1 months
期刊介绍: Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.
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