Jimin Jang, Euihoon Jeong, Minwoong Joe, Tobiloba Gabriel Abraham, Younggeun Jang, Jongchan Yoon, Jaegu Song, Zonghoon Lee, Tuson Park, Youngchan Kim, Changgu Lee
{"title":"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","authors":"Jimin Jang, Euihoon Jeong, Minwoong Joe, Tobiloba Gabriel Abraham, Younggeun Jang, Jongchan Yoon, Jaegu Song, Zonghoon Lee, Tuson Park, Youngchan Kim, Changgu Lee","doi":"10.1002/smll.202406202","DOIUrl":null,"url":null,"abstract":"<p>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 CoS<sub>2</sub> to cubic Co<sub>3</sub>S<sub>4</sub> and hexagonal CoS is achieved. Magnetotransport studies revealed metallic and ferromagnetic behaviors at temperatures below the Curie temperature for CoS<sub>2</sub>. In addition, electrical measurements of Co<sub>3</sub>S<sub>4</sub>- 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.</p>","PeriodicalId":228,"journal":{"name":"Small","volume":"21 6","pages":""},"PeriodicalIF":12.1000,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Controllable Synthesis of Magnetic 2D Non-Layered Cobalt Sulfide Nanocrystals Using Chemical Vapor Deposition\",\"authors\":\"Jimin Jang, Euihoon Jeong, Minwoong Joe, Tobiloba Gabriel Abraham, Younggeun Jang, Jongchan Yoon, Jaegu Song, Zonghoon Lee, Tuson Park, Youngchan Kim, Changgu Lee\",\"doi\":\"10.1002/smll.202406202\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>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 CoS<sub>2</sub> to cubic Co<sub>3</sub>S<sub>4</sub> and hexagonal CoS is achieved. Magnetotransport studies revealed metallic and ferromagnetic behaviors at temperatures below the Curie temperature for CoS<sub>2</sub>. In addition, electrical measurements of Co<sub>3</sub>S<sub>4</sub>- 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.</p>\",\"PeriodicalId\":228,\"journal\":{\"name\":\"Small\",\"volume\":\"21 6\",\"pages\":\"\"},\"PeriodicalIF\":12.1000,\"publicationDate\":\"2024-12-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Small\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/smll.202406202\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/smll.202406202","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
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.
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.