Monitoring anthropogenic particles in the environment: Recent developments and remaining challenges at the forefront of analytical methods. Karin Mattsson, Vitor Hugo da Silva, Amrika Deonarine, Stacey M.Advances in Analytical Chemistry 2022, 12 Analysis and Application of Signal Fluctuation in Ultra-Sensitive Detection. Annual Review of Physical Chemistry 2022, 73 Imaging Dynamic Processes in Multiple Dimensions and Length Scales. Filbrun, Fei Zhao, Kuangcai Chen, Teng-Xiang Huang, Meek Yang, Xiaodong Cheng, Bin Dong, Ning Fang. Physical Chemistry Chemical Physics 2022, 24 Determining nanorod dimensions in dispersion with size anisotropy nanoparticle tracking analysis. The Journal of Physical Chemistry C 2019, 123 Determining the Spheroid Geometry of Individual Metallic Nanoparticles by Two-Dimensional Single-Particle Dynamic Light Scattering. Approaches to Understanding the Solution-State Organization of Spray-Dried Dispersion Feed Solutions and Its Translation to the Solid State. The Journal of Physical Chemistry B 2021, 125 Sub-millisecond Translational and Orientational Dynamics of a Freely Moving Single Nanoprobe. Backscattering-Based Discrimination of Microparticles Using an Optofluidic Multiangle Scattering Chip. Reza Ebrahimifard, Peer Erfle, Andreas Dietzel, Georg Garnweitner.This article is cited by 11 publications. SP-DLS should serve as a powerful, nondestructive technique for characterizing the shapes of individual MNPs and other nanostructures. Our results show remarkable agreement with transmission electron microscopy analyses of the same population and allow for unprecedented measurements of the extent of prolate or oblate asphericity of nominally spherical MNPs in solution where the current implementation affords an asphericity detection limit of ∼2.5% assuming a 10% relative error. Assuming symmetric-top rotors for MNPs and passively confining them to the focal volume of a dark-field microscope for long-term observation, we directly relate polarization dynamic fluctuations in the scattered light to the relative difference between the nondegenerate axes of individual particles. In this work, we introduce “single-particle dynamic light scattering” (SP-DLS) as a far-field technique capable of analyzing the shape of individual, freely diffusing MNPs. Techniques to measure the shape of a single particle are lacking, however, often requiring immobilization, extensive numerical simulations, and irreversible alterations of the particle or its environment. In particular, many recent advances have highlighted the importance of fundamentally understanding dynamic reconfiguration in MNP morphologies and compositions. Metallic nanoparticles (MNPs) are prevalent in modern nanotechnologies due to their unique optical properties, chemical and photostability, and ease of manipulation.
0 kommentar(er)
