Fabrication of Three-Dimensional Macroporous Membranes with Assemblies of Microspheres as Templates

Chemistry of Materials

Volumn 10, Issue 7, 1998, Pages 1745-1747

  Park, Sang Hyun ^a   Xia, Younan ^a  

^a UNIVERSITY OF WASHINGTON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0041421675     PISSN: 08974756     EISSN: None     Source Type: Journal    
DOI: 10.1021/cm9801993     Document Type: Article

References (29)

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20. Park, S. H.; Xia, Y. Langmuir Submitted.
21. The thickness (H) of the cell is approximately the same as the thickness of the photoresist film, which can be easily changed from ∼0.5 to ∼50 μm by using different photoresists, different concentrations of solutions, and/or different speeds for spin-coating. The photoresist films used in the present study were ∼12 μm thick.
22. A variety of monodispersed microsphes, including polystyrene beads, silica colloids, silver-coated polystyrene beads, and polycarbonate beads, have been successfully assembled using this procedure (see refs 12 and 13), and their sizes can vary from ∼0.1 to 10 μm Here we have only used 0.97-μm polystyrene beads to demonstrate the capability of the procedure.
23. 2 gas increased When the packing is too fast, polycrystalline rather than single crystalline assemblies are formed. Since polycrystalline assemblies are still useful in fabricating thin film membranes, we used a rate of ∼3 mm/h (for a 12-μm-thick and 2-cm-wide cell) for generating all the assemblies of 0.97-μm polystyrene beads used in fabricating the membranes.
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