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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jansen, Henricus V.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2013Fabrication of 3D fractal structures using nanoscale anisotropic etching of single crystalline siliconcitations
- 2010Combining retraction edge lithography and plasma etching for arbitrary contour nanoridge fabricationcitations
- 2009Characterization of MEMS-on-tube assembly: reflow bonding of borosilicate glass (Duran ®) tubes to silicon substratescitations
- 2008Fabrication of a silicon oxide stamp by edge lithography reinforced with silicon nitride for nanoimprint lithographycitations
- 2008Monolithics silicon nano-ridge fabrication by edge lithography and wet anisotropic etching of silicon
- 2007Simple technique for direct patterning of nanowires using a nanoslit shadow-maskcitations
- 2006Polymeric microsieves produced by phase separation micromoldingcitations
- 2006Nano-ridge fabrication by local oxidation of silicon edges with silicon nitride as a maskcitations
- 2005Nano-ridge fabrication by local oxidation of silicon edges with silicon nitride as a mask
- 2003Wet anisotropic etching for fluidic 1d nanochannelscitations
- 2002Wet anisotropic etching for fluidic 1D nanochannels
- 2000High resolution powder blast micromachiningcitations
- 2000Mask materials for powder blastingcitations
Places of action
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article
Polymeric microsieves produced by phase separation micromolding
Abstract
The fabrication of polymeric microsieves with tunable properties (pore size, shape or porosity) is described in this work. Perfectly structured freestanding membranes and accurate replicas of polyethersulfone (PES), copolymers of polyethersulfone and polyethylene oxide (PES–PEO), and blends of PES and hydrophilic additives were produced by phase separation micromolding (PSμM) using a microstructured mold. Phase separation occurred in two stages: vapor-induced phase separation (VIPS), where shrinkage and subsequent perforation of the polymer film took place, and liquid-induced phase separation (LIPS), where lateral shrinkage that facilitated the release of the polymer replica from the mold occurred. The dimensions of the perforations were tuned either by using molds with different pillar diameter or by thermal treatment of the polymer above its glass transition temperature. By the latter method, microsieves with initial pore sizes of about 5 or 2.5 μm were reduced to 1.5 and 0.5 μm, respectively, whereas perforations down to 1.2 μm were achieved by tuning the dimensions of the mold features.