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Liquid Cell Electron Microscopy of Nanoparticle Self-Assembly Driven by Solvent Drying

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Title
Liquid Cell Electron Microscopy of Nanoparticle Self-Assembly Driven by Solvent Drying
Author(s)
Lee W.C.; Byung Hyo Kim; Choi S.; Takeuchi S.; Jungwon Park
Publication Date
2017-02
Journal
Journal of Physical Chemistry Letters, v.8, no.3, pp.647 - 654
Publisher
AMER CHEMICAL SOC
Abstract
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. © 2017 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/3487
ISSN
1948-7185
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
J.Physical Chemistry Lett(Liquid-cell electron).pdfDownload

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