Tracking motion of nanoscale particles at a liquid-solid interface

A team from National University of Singapore have demonstrated the nanoscale rotational dynamics of surface-adsorbed particles  at high spatial and temporal resolution using Hummingbird Scientific’s Liquid Cell platform. The work  is published in Nano Letters.

Beam-induced rotation and displacement of Au nanorods and nanobipyramids adsorbed onto a SiNx surface at a rate of 300 frames oer second. Image Copyright © 2019 American Chemical Society

There is a fundamental interest in understanding interaction of particles and molecules with surfaces, including capturing the intermediate states during adsorption and desorption of NPs at solid surfaces. Here researchers used liquid cell TEM, and exploited the high spatial and temporal capabilities of capturing nanoparticle dynamics under electron beam – concurrently tracking both the rotation and translation of surface-adsorbed anisotropic nanoparticles. The work presents important insights into surface interactions of particles and understanding of interfacial transport.

Reference: See Wee Chee, Utkarsh Anand, Geeta Bisht, Shu Fen Tan, and Utkur Mirsaidov. “Direct Observations of the Rotation and Translation of Anisotropic Nanoparticles Adsorbed at a Liquid–Solid Interface,” Nano Letters (2019). DOI:10.1021/acs.nanolett.8b04962

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