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      Avoiding cracks in nanoparticle films.

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          Abstract

          A new method utilizing subsequent depositions of thin crack-free nanoparticle layers is demonstrated to avoid the formation of cracks within silica nanoparticle films. Using this method, films can be assembled with thicknesses exceeding the critical cracking values. Explanation of this observed phenomenon is hypothesized to mainly arise from chemical bond formation between neighboring silica nanoparticles. Application of this method for fabricating crack-free functional structures is demonstrated by producing crack-free Bragg reflectors that exhibit structural color.

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          Author and article information

          Journal
          Nano Lett.
          Nano letters
          1530-6992
          1530-6984
          Oct 10 2012
          : 12
          : 10
          Affiliations
          [1 ] Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
          Article
          10.1021/nl302555k
          22984890

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