stress response of silver nanoparticle film on a water subphase

ORAL

Abstract

We examine the stress response of a film composed of dodecanethiol-ligated silver nanoparticles and supported on a water subphase, using optical microscopy and synchrotron x-ray techniques (x-ray reflectivity and grazing incidence x-ray diffraction). We observe a monolayer-to-bilayer transition, which is followed by wrinkling and folding of the nanoparticle film. The results are quantitatively different from a similar film of gold nanoparticles, which undergoes a monolayer-to-trilayer transition and wrinkles with a longer wavelength. The silver film is also less covered in wrinkles and folds than the gold film at similar compressive strains, and the wrinkles quickly relax when compression is stopped.

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Authors

  • Kyungil Kim

    University of Chicago

  • Brian Leahy

    University of Chicago

  • Yeling Dai

    Department of Physics, University of California, San Diego, University of California at San Diego

  • Janet Soltau

    University of Vermont

  • O. G. Shpyrko

    University of California San Diego, Department of Physics, University of California, San Diego, UC San Diego, University of California at San Diego, University of California, San Diego, University of California, San Diego, La Jolla, CA 92093, USA

  • Mati Meron

    University of Chicago

  • Binhua Lin

    University of Chicago