在三维中绘制Au@Pd核心外纳米颗粒的表面和表面下原子结构
Yiheng Dai1, Zhiheng Xie1, Yao Zhang1
1Beijing National Laboratory for Molecular Sciences, Center for Integrated Spectroscopy, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
ACS nano
|February 20, 2025
概括
这项研究揭示了金 (Au@Pd) 核心外纳米颗粒中的原子排列如何影响其特性. 了解这些3D结构是设计先进纳米材料的关键.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 表面科学是一门学科.
背景情况:
- 纳米材料的3D原子结构对于结构功能相关性至关重要.
- 由于成像的局限性,在高分辨率下解决这些结构是具有挑战性的.
研究的目的:
- 为了确定Au@Pd核心外纳米粒子的3D原子表面和地下结构.
- 为了将这些结构与电子和表面化学特性相关联.
主要方法:
- 原子分辨率电子断层扫描 (AET) 用于成像纳米粒子结构.
- 用光谱和电化学测量来分析性能.
主要成果:
- 金 (Au) 和 (Pd) 的混合显著影响了表面和地下结构.
- 在混合,结合障碍和拉伸应变之间发现了负相关性.
- 不同的表面结构与不同的Au/Pd比率的变化电子和化学特性相关.
结论:
- 这项工作阐明了现实的纳米材料中复杂的表面/地表结构.
- 它增强了对纳米结构中单个原子水平结构-功能关系的理解.
相关概念视频
Atomic Structure
163.2K
Overview
163.2K
Atomic Force Microscopy
3.1K
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
3.1K
Electron Microscope Tomography and Single-particle Reconstruction
2.1K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.1K
Atomic Structure
82.8K
The Greek philosopher Democritus proposed that everything on Earth is made up of tiny particles called atomos, Greek for "indivisible," from which the modern term "atom" is derived. In the 19th century, John Dalton proposed the atomic theory that is still largely correct today. He put forth five postulates to explain how atoms made up the world around us. (1) All matter is composed of infinitely small particles or atoms. (2) All atoms of a given element are identical to one...
82.8K


