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    Pulsed Laser Annealing of Thin Films of Self-Assembled Nanocrystals

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    Type
    Article
    Authors
    Baumgardner, William J.
    Choi, Joshua J.
    Bian, Kaifu
    Fitting Kourkoutis, Lena
    Smilgies, Detlef-M. cc
    Thompson, Michael O.
    Hanrath, Tobias
    KAUST Grant Number
    KUS-C1-018-02
    Date
    2011-08-08
    Online Publication Date
    2011-08-08
    Print Publication Date
    2011-09-27
    Permanent link to this record
    http://hdl.handle.net/10754/599415
    
    Metadata
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    Abstract
    We investigated how pulsed laser annealing can be applied to process thin films of colloidal nanocrystals (NCs) into interconnected nanostructures. We illustrate the relationship between incident laser fluence and changes in morphology of PbSe NC films relative to bulk-like PbSe films. We found that laser pulse fluences in the range of 30 to 200 mJ/cm2 create a processing window of opportunity where the NC film morphology goes through interesting transformations without large-scale coalescence of the NCs. NC coalescence can be mitigated by depositing a thin film of amorphous silicon (a-Si) on the NC film. Remarkably, pulsed laser annealing of the a-Si/PbSe NC films crystallized the silicon while NC morphology and translational order of the NC film are preserved. © 2011 American Chemical Society.
    Citation
    Baumgardner WJ, Choi JJ, Bian K, Fitting Kourkoutis L, Smilgies D-M, et al. (2011) Pulsed Laser Annealing of Thin Films of Self-Assembled Nanocrystals. ACS Nano 5: 7010–7019. Available: http://dx.doi.org/10.1021/nn201588p.
    Sponsors
    We thank Jan Koenig for providing bulk PbSe thin film samples. W.B. was supported by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). K.B. was supported by NSF-CBET 0828703. J.J.C. was supported by the NSF IGERT Fellowship Program on "Nanoscale Control of Surfaces and Interfaces," administered by Cornell's MRSEC. We also acknowledge the Cornell Center for Materials Science (NSF DMR-0520404) and the Cornell High Energy Synchrotron Source (NSF DMR-09262384).
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Nano
    DOI
    10.1021/nn201588p
    PubMed ID
    21800845
    ae974a485f413a2113503eed53cd6c53
    10.1021/nn201588p
    Scopus Count
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