Journal
LANGMUIR
Volume 30, Issue 25, Pages 7615-7620Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la5015253
Keywords
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Funding
- National Science Foundation Graduate Research Fellowship
- National Defense Science and Engineering Graduate fellowship from the Department of Defense
- Leopoldina Fellowship Program
- Edward, Frances and Shirley B. Daniels and Wyss Fellowship
- Air Force Office of Scientific Research (AFOSR) [FA9550-09-0669-DOD35CAP]
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Porous materials display interesting transport phenomena due to restricted motion of fluids within the nano- to microscale voids. Here, we investigate how liquid wetting in highly ordered inverse opals is affected by anisotropy in pore geometry. We compare samples with different degrees of pore asphericity and find different wetting patterns depending on the pore shape. Highly anisotropic structures are infiltrated more easily than their isotropic counterparts. Further, the wetting of anisotropic inverse opals is directional, with liquids filling from the side more easily. This effect is supported by percolation simulations as well as direct observations of wetting using time-resolved optical microscopy.
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