Nanostructured 2D-transition metal dichalcogenides

纳米结构二维过渡金属二硫属化物

• 批准号: 1801199
• 负责人: Matthias Batzill
• 金额: $ 40.42万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1801199&HistoricalAwards=false
• 关键词: Nanostructured; 2D; transition; metal; dichalcogenides

Two-dimensional (2D) materials are those that extend in one plane like a piece of paper, but are only a single molecular layer thick. Thus, essentially all atoms in a 2D material are located at the surface and interact with their environment. This ability to form reactive surfaces makes 2D materials interesting for promoting chemical reactions, such as those driven by electricity or light, processes known as electro- or photocatalysis, respectively. In perfect 2D materials, the lack of broken bonds at the surface of the single molecular layers often makes them quite chemically inert. Useful chemical functionalities arise from crystal imperfections that are challenging to create in a reliable and controlled manner. In this project, Professor Matthias Batzill and his group at the University of South Florida are designing 2D materials with atomic-scale crystal modifications. The researchers then correlate the structural and electronic properties of the 2D materials with their chemical functionalities. Their research may lead to novel concepts for making novel or improved multicomponent 2D materials for electrocatalysis. The research in this project is strongly interdisciplinary and teaches students chemistry concepts that prepare them for jobs in industry or academia. Moreover, this project strengthens international collaborations and encourages students to gain international research experience by fostering student exchanges with collaborating institutions abroad. Students will collaborate with the University of Electronic Science and Technology of China (UESTC) as well as at Elettra and Soleil synchrotrons in Italy and France, respectively. With funding from the Macromolecular, Supramolecular and Nanochemistry (MSN) Program of the Chemistry Division, multi-component and nanostructured transition metal dichalcogenides (TMDCs) are investigated to determine fundamental principles for the creation of catalytically active sites in these materials. Molecular beam epitaxy (MBE) is employed to synthesize model systems with well-defined crystal modifications. Regulating growth conditions in MBE enables control over edge density, composition, and phase boundaries, as well as intrinsic and extrinsic defects. The structure, defects, and interfaces are characterized with atomic resolution by scanning tunneling microscopy and spectroscopy. Photoemission gives additional insight into electronic states and band alignments that promote charge transfer processes. These structural and electronic properties of nanostructured TMDCs are correlated to chemical properties by a combination of vacuum characterization of adsorption and reaction of probe molecules, as well as photocatalytic and electrocatalytic investigations under realistic reaction conditions.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

二维 (2D) 材料是那些像一张纸一样在一个平面上延伸的材料，但只有一个分子层厚。因此，基本上二维材料中的所有原子都位于表面并与其环境相互作用。这种形成反应表面的能力使得二维材料对于促进化学反应很有趣，例如由电或光驱动的化学反应，分别称为电催化或光催化。在完美的二维材料中，单分子层表面缺乏断裂的键通常使它们具有相当的化学惰性。有用的化学功能源于晶体缺陷，而以可靠和受控的方式制造这些缺陷具有挑战性。在这个项目中，南佛罗里达大学的 Matthias Batzill 教授和他的团队正在设计具有原子级晶体修饰的二维材料。然后，研究人员将二维材料的结构和电子特性与其化学功能相关联。他们的研究可能会带来用于制造新型或改进的电催化多组分二维材料的新概念。该项目的研究具有很强的跨学科性，教授学生化学概念，为他们在工业界或学术界的工作做好准备。此外，该项目加强了国际合作，并通过促进与国外合作机构的学生交流来鼓励学生获得国际研究经验。 学生们将与中国电子科技大学（UESTC）以及意大利和法国的 Elettra 和 Soleil 同步加速器合作。 在化学部高分子、超分子和纳米化学 (MSN) 项目的资助下，研究了多组分和纳米结构过渡金属二硫属化物 (TMDC)，以确定在这些材料中创建催化活性位点的基本原理。分子束外延 (MBE) 用于合成具有明确晶体修饰的模型系统。调节 MBE 中的生长条件可以控制边缘密度、成分和相界以及内在和外在缺陷。通过扫描隧道显微镜和光谱学以原子分辨率表征结构、缺陷和界面。光电发射可以进一步深入了解促进电荷转移过程的电子状态和能带排列。纳米结构 TMDC 的这些结构和电子特性通过结合探针分子的吸附和反应的真空表征以及实际反应条件下的光催化和电催化研究与化学特性相关。该奖项反映了 NSF 的法定使命，并被认为是值得的通过使用基金会的智力优势和更广泛的影响审查标准进行评估来获得支持。

项目成果

Room‐Temperature Ferromagnetism in MoTe 2 by Post‐Growth Incorporation of Vanadium Impurities

MoTe 2 中的室温铁磁性（通过钒杂质的后生长掺入）

• DOI: 10.1002/aelm.201900044
• 发表时间: 2019-04
• 期刊: Advanced Electronic Materials
• 影响因子: 6.2
• 作者: Coelho, Paula Mariel;Komsa, Hannu‐Pekka;Lasek, Kinga;Kalappattil, Vijaysankar;Karthikeyan, Jeyakumar;Phan, Manh‐Huong;Krasheninnikov, Arkady V.;Batzill, Matthias
• 通讯作者: Batzill, Matthias

Which Transition Metal Atoms Can Be Embedded into Two-Dimensional Molybdenum Dichalcogenides and Add Magnetism?

哪些过渡金属原子可以嵌入二维钼二硫属化物中并增加磁性？

• DOI: 10.1021/acs.nanolett.9b01555
• 发表时间: 2019-06
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Karthikeyan, J.;Komsa, Hannu;Batzill, Matthias;Krasheninnikov, Arkady V.
• 通讯作者: Krasheninnikov, Arkady V.

Mirror twin grain boundaries in molybdenum dichalcogenides

二硫属化钼中的镜像孪晶晶界

• DOI: 10.1088/1361-648x/aae9cf
• 发表时间: 2018-12
• 期刊: Journal of Physics: Condensed Matter
• 作者: Batzill; Matthias
• 通讯作者: Matthias

Synthesis and characterization of 2D transition metal dichalcogenides: Recent progress from a vacuum surface science perspective

二维过渡金属二硫属化物的合成和表征：真空表面科学视角的最新进展

• DOI: 10.1016/j.surfrep.2021.100523
• 发表时间: 2021-03
• 期刊: Surface Science Reports
• 影响因子: 9.8
• 作者: Lasek, Kinga;Li, Jingfeng;Kolekar, Sadhu;Coelho, Paula Mariel;Guo, Lu'an;Zhang, Min;Wang, Zhiming;Batzill, Matthias
• 通讯作者: Batzill, Matthias

Mirror twin boundaries in MoSe 2 monolayers as one dimensional nanotemplates for selective water adsorption

MoSe 2 单层中的镜像孪晶边界作为选择性水吸附的一维纳米模板

• DOI: 10.1039/d0nr08345c
• 发表时间: 2021-01
• 期刊: Nanoscale
• 影响因子: 6.7
• 作者: Li, Jingfeng;Joseph, Thomas;Ghorbani;Kolekar, Sadhu;Krasheninnikov, Arkady V.;Batzill, Matthias
• 通讯作者: Batzill, Matthias