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NiPt截角八面体纳米颗粒/MoS异质结构的构建及其界面结构演变

Construction of the Heterostructure of NiPt Truncated Octahedral Nanoparticle/MoS and Its Interfacial Structure Evolution.

作者信息

Mu Congyan, Li Hao, Zhou Liang, Ye Huanyu, Wang Rongming, Sun Yinghui

机构信息

Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.

出版信息

Nanomaterials (Basel). 2023 May 31;13(11):1777. doi: 10.3390/nano13111777.

DOI:10.3390/nano13111777
PMID:37299680
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10255085/
Abstract

Interfacial atomic configuration plays a vital role in the structural stability and functionality of nanocomposites composed of metal nanoparticles (NPs) and two-dimensional semiconductors. In situ transmission electron microscope (TEM) provides a real-time technique to observe the interface structure at atomic resolution. Herein, we loaded bimetallic NiPt truncated octahedral NPs (TONPs) on MoS nanosheets and constructed a NiPt TONPs/MoS heterostructure. The interfacial structure evolution of NiPt TONPs on MoS was in situ investigated using aberration-corrected TEM. It was observed that some NiPt TONPs exhibited lattice matching with MoS and displayed remarkable stability under electron beam irradiation. Intriguingly, the rotation of an individual NiPt TONP can be triggered by the electron beam to match the MoS lattice underneath. Furthermore, the coalescence kinetics of NiPt TONPs can be quantitatively described by the relationship between neck radius () and time (), expressed as . Our work offers a detailed analysis of the lattice alignment relationship of NiPt TONPs on MoS, which may enlighten the design and preparation of stable bimetallic metal NPs/MoS heterostructures.

摘要

界面原子构型在由金属纳米颗粒（NPs）和二维半导体组成的纳米复合材料的结构稳定性和功能中起着至关重要的作用。原位透射电子显微镜（TEM）提供了一种在原子分辨率下观察界面结构的实时技术。在此，我们将双金属NiPt截顶八面体纳米颗粒（TONPs）负载在MoS纳米片上，并构建了NiPt TONPs/MoS异质结构。使用像差校正TEM原位研究了MoS上NiPt TONPs的界面结构演变。观察到一些NiPt TONPs与MoS表现出晶格匹配，并在电子束照射下显示出显著的稳定性。有趣的是，单个NiPt TONP的旋转可以由电子束触发，以匹配下方的MoS晶格。此外，NiPt TONPs的聚结动力学可以通过颈半径（）与时间（）之间的关系进行定量描述，表示为 。我们的工作对MoS上NiPt TONPs的晶格排列关系进行了详细分析，这可能为稳定的双金属金属NPs/MoS异质结构的设计和制备提供启示。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/53489adfd8d1/nanomaterials-13-01777-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/0fa59ba77920/nanomaterials-13-01777-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/5698def60a99/nanomaterials-13-01777-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/20c3972d4172/nanomaterials-13-01777-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/a247b804eca2/nanomaterials-13-01777-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/53489adfd8d1/nanomaterials-13-01777-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/0fa59ba77920/nanomaterials-13-01777-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/5698def60a99/nanomaterials-13-01777-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/20c3972d4172/nanomaterials-13-01777-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/a247b804eca2/nanomaterials-13-01777-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/73a3/10255085/53489adfd8d1/nanomaterials-13-01777-g005.jpg

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