相关实验视频

Updated: Jan 18, 2026

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Published on: August 18, 2017

通过旋转编码散射显微镜实时可视化子粒子反应异构性

Jun-Hao Wan^1,2, Gang Wu^1,2, Chen Qian^3,4

¹Hefei National Laboratory for Physical Sciences at the Microscale, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, China.

Nature communications

|January 16, 2026

概括

旋转编码散射显微镜 (RESM) 可实时可视化纳米级化学变化. 这种新技术揭示了子粒子反应路径,进步了催化和材料科学.

科学领域:

纳米技术纳米技术
化学动力学化学动力学
材料科学材料科学材料科学

背景情况:

液体中的纳米化学转化对于催化和材料合成至关重要.
目前的光学成像方法缺乏对子粒子动态的分辨率和灵敏度.
这些过程的实时,无标签的可视化仍然是一个重大挑战.

研究的目的:

介绍了一种新的光学成像技术,即旋转编码散射显微镜 (RESM).
实现实时,无标签可视化子粒子化学转换,具有高灵敏度和分辨率.
阐明纳米级化学反应机制和途径.

主要方法:

开发了旋转编码散射显微镜 (RESM).
动态设计了点传播函数 (PSF) 来编码子粒子结构变化.
应用RESM研究银纳米圈氧化和普鲁士蓝色纳米粒子间隙.

主要成果:

RESM允许在子粒子水平上直接跟踪化学反应.
银纳米圈 (Ag NSs) 的化度依赖氧化机制.
通过高Cl-度的AgCl沉观察到异型氧化,与低度的同型氧化不同.
证明了普鲁士蓝色纳米颗粒的异构介质动力学,揭示了子粒子异质性.

结论:

在纳米尺度上,RESM提供高灵敏度的化学成像.
该技术可视化了以前隐藏的子粒子反应路径.
RESM将结构特征和功能性能结合在一起,为纳米级研究提供了一个广泛适用的平台.

更多相关视频

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

相关概念视频

Measuring Reaction Rates

Measuring Reaction Rates

Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...

Electron Microscope Tomography and Single-particle Reconstruction

Electron Microscope Tomography and Single-particle Reconstruction

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...