二维横向异构结构通过顺序边缘表皮生长
Prasana K Sahoo1, Shahriar Memaran2,3, Yan Xin2
1Department of Physics, University of South Florida, Tampa, Florida 33620, USA.
Nature
|January 5, 2018
概括
研究人员开发了一种单方法,从过渡金属二基中连续制造多连接的侧向异构结构. 这种进步可以精确控制这些先进的电子设备材料的生长.
科学领域:
- 材料科学
- 凝聚物质物理学
- 纳米技术
背景情况:
- 过渡金属二甲基化物 (TMD) 的二维 (2D) 异构连接对先进的光电器件具有前景.
- 目前用于横向TMD异构的制造方法缺乏现场控制和灵活性.
- 现有的技术往往导致污染和长时间的处理.
研究的目的:
- 开发一种新的,灵活的,可控的方法来合成2DTMD单层的侧向多连接异构结构.
- 在制造复杂的二维异构结构时克服顺序增长和现场控制的局限性.
主要方法:
- 使用单个异质固体源的单合成方法.
- 通过用水蒸气改变反应性气体环境来控制异质连接的顺序形成.
- 对前体氧化,挥发和核化进行选择性控制.
主要成果:
- 从TMD单层中连续制造横向多连接的异构结构.
- 通过光发光映射证明了带隙的顺序空间调制.
- 通过原子分辨率成像和电传输测量证实无缺陷的横向连接和二极管式响应.
结论:
- 开发的单方法为制造复杂的TMD横向异构结构提供了更高的灵活性和控制.
- 这种方法使得原子薄的平面超级格子不断生长.
- 这些发现为开发基于二维材料的新型设备和集成电路提供了基础.
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