Dynamics of Soft Nanomaterials Captured by Transmission Electron Microscopy in Liquid Water

In this paper we present <i>in situ</i> transmission electron microscopy of synthetic polymeric nanoparticles with emphasis on capturing motion in a solvated, aqueous state. The nanoparticles studied were obtained from the direct polymerization of a Pt­(II)-containing monomer. The resulting structures provided sufficient contrast for facile imaging <i>in situ</i>. We contend that this technique will quickly become essential in the characterization of analogous systems, especially where dynamics are of interest in the solvated state. We describe the preparation of the synthetic micellar nanoparticles together with their characterization and motion in liquid water with comparison to conventional electron microscopy analyses.