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    Cryo-transmission electron microscopy of Ag nanoparticles grown on an ionic liquid substrate

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    Type
    Article
    Authors
    Anjum, Dalaver H. cc
    Stiger, Rebecca M.
    Finley, James J.
    Conway, James F.
    KAUST Department
    Advanced Nanofabrication, Imaging and Characterization Core Lab
    Core Labs
    Electron Microscopy
    Imaging and Characterization Core Lab
    Date
    2011-01-31
    Online Publication Date
    2011-01-31
    Print Publication Date
    2010-07
    Permanent link to this record
    http://hdl.handle.net/10754/561547
    
    Metadata
    Show full item record
    Abstract
    We report a novel method of growing silver nanostructures by cathodic sputtering onto an ionic liquid (IL) and our visualization by transmission cryo-electron microscopy to avoid beam-induced motion of the nanoparticles. By freezing the IL suspension and controlling electron dose, we can assess properties of particle size, morphology, crystallinity, and aggregation in situ and at high detail. We observed round silver nanoparticles with a well-defined diameter of 7.0 ± 1.5 nm that are faceted with crystalline cubic structures and ∼80% of the particles have multiply twinned faults. We also applied cryo-electron tomography to investigate the structure of the nanoparticles and to directly visualize the IL wetting around them. In addition to particles, we observed nanorods that appear to have assembled from individual nanoparticles. Reexamination of the samples after 4-5 days from initial preparation showed significant changes in morphology, and potential mechanisms for this are discussed. © 2010 Materials Research Society.
    Citation
    Anjum, D. H., Stiger, R. M., Finley, J. J., & Conway, J. F. (2010). Cryo-transmission electron microscopy of Ag nanoparticles grown on an ionic liquid substrate. Journal of Materials Research, 25(7), 1264–1271. doi:10.1557/jmr.2010.0166
    Publisher
    Cambridge University Press (CUP)
    Journal
    Journal of Materials Research
    DOI
    10.1557/jmr.2010.0166
    ae974a485f413a2113503eed53cd6c53
    10.1557/jmr.2010.0166
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab

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