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Ultra‐Long Van Der Waals CdBr2 Micro/Nanobelts
Small Methods ( IF 10.7 ) Pub Date : 2020-09-01 , DOI: 10.1002/smtd.202000501
Fei Wang 1 , Lemin Jia 1 , Ying Ding 1 , Haihuai Cai 1 , Wei Zheng 1 , Feng Huang 1
Affiliation  

Recently, 1D van der Waals materials with appealing optoelectronic properties different from 2D layered materials have attracted widespread attention. However, the existing methods are incapable of growing the high‐quality and large‐size 1D van der Waals materials to a certain extent. Here, a new method of organic liquid phase synthesis followed by annealing is proposed, which overcomes the crystal size limitation caused by chemical vapor deposition and successfully synthesizes the high‐quality ultra‐long (millimeter level) van der Waals CdBr2 micro/nanobelts without being limited by substrate matching. The Raman tensor of CdBr2 with extremely high anisotropy is extracted, revealing the structure and physical properties of this van der Waals crystal. What is more, based on this material, the photodetectors with high responsivity are manufactured. Methodologically, compared with current methods, this work indicates the advantages of liquid phase synthesis in growing high‐quality, large‐size 1D van der Waals materials. It is believed that the method proposed in this paper can provide a noble perspective for the study of 1D van der Waals materials and arouse a lot of interest in the field of optoelectronics.

中文翻译:

超长范德华力CdBr2微/纳米带

近来,具有与2D层状材料不同的有吸引力的光电特性的1D van der Waals材料引起了广泛的关注。但是,现有方法无法在一定程度上扩展高质量和大尺寸一维范德华材料。在这里,提出了一种新的有机液相合成然后退火的方法,该方法克服了化学气相沉积引起的晶体尺寸限制,成功地合成了高质量的超长(毫米级)范德华斯CdBr 2微米/纳米级无受基材匹配的限制。CdBr 2的拉曼张量提取出具有极高各向异性的材料,揭示了该范德华晶体的结构和物理性质。而且,基于这种材料,制造了具有高响应度的光电检测器。从方法上讲,与目前的方法相比,这项工作表明了液相合成在增长高质量,大尺寸一维范德华材料方面的优势。相信本文提出的方法可以为一维范德华材料的研究提供一个崇高的前景,并引起光电子领域的很多兴趣。
更新日期:2020-10-07
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