Lee, Won Chul Kim, Byung Hyo Choi, Sun Takeuchi, Shoji Park, Jungwon 2024-01-20T02:30:22Z 2024-01-20T02:30:22Z 2021-09-01 2017-02 1948-7185 https://pubs.kist.re.kr/handle/201004/123138 Drying a colloidal solution of nanoparticles is a versatile method to construct self assembled structures of nanoparticles. However, mechanistic understanding has mostly relied on empirical knowledge obtained from the final structures of self-assembly as relevant processes during solvent drying are likely kinetic and far from equilibrium. Here, we present in situ TEM studies of nanoparticle self-assembly under various conditions, including the concentrations of the initial solution and the types of nanoparticles and substrates. The capability of tracking trajectories of individual nanoparticles enables us to understand the mechanisms of drying-mediated self assembly at the single-nanoparticle level. Our results consistently show that a solvent boundary primarily affects nanoparticle motions and the resulting self-assembly processes regardless of different conditions. The solvent boundary drives nanoparticles to form two-dimensional assembly mainly through two pathways, transporting scattered nanoparticles by lateral dragging and flattening aggregated nanoparticles by vertical pressing. English American Chemical Society Liquid Cell Electron Microscopy of Nanoparticle Self-Assembly Driven by Solvent Drying Article 10.1021/acs.jpclett.6b02859 1 The Journal of Physical Chemistry Letters, v.8, no.3, pp.647 - 654 The Journal of Physical Chemistry Letters 8 3 647 654 N scie scopus 000393443400018 2-s2.0-85011369106 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Atomic, Molecular & Chemical Chemistry Science & Technology - Other Topics Materials Science Physics Article X-RAY-SCATTERING NANOCRYSTAL SUPERLATTICE GOLD NANOPARTICLES RINGS GROWTH INTERFACE NETWORKS MODEL