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Substrate topography guides pore morphology evolution in nanoporous gold thin films

  • Author(s): Chapman, CAR
  • Daggumati, P
  • Gott, SC
  • Rao, MP
  • Seker, E
  • et al.
Abstract

© 2015 Acta Materialia Inc. This paper illustrates the effect of substrate topography on morphology evolution in nanoporous gold (np-Au) thin films. One micron-high silicon ridges with widths varying between 150 nm and 50 μm were fabricated and coated with 500 nm-thick np-Au films obtained by dealloying sputtered gold-silver alloy films. Analysis of scanning electron micrographs of the np-Au films following dealloying and thermal annealing revealed two distinct regimes where the ratio of film thickness to ridge width determines the morphological evolution of np-Au films.

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