| People | Locations | Statistics |
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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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Kooij, Ernst Stefan
University of Twente
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2019Brush Swelling and Attachment Strength of Barnacle Adhesion Protein on Zwitterionic Polymer Films as a Function of Macromolecular Structurecitations
- 2015Colloidal Route to Bio-inspired Hierarchical Superhydrophobic Substrates
- 2015Amplified responsiveness of multi-layered, polymer grafts: Synergy between brushes and hydrogelscitations
- 2015Innovative gold nanoparticle patterning and selective metallization
- 2013Selective metallization by seeded growth on patterned gold nanoparticle arrayscitations
- 2011Novel, highly selective gold nanoparticle patterning on surfaces using pure watercitations
- 2011Dielectrophoretic alignment of metal and metal oxide nanowires and nanotubescitations
- 2008Field induced phase segregation in ferrofluidscitations
- 2006Seeded-Growth Approach to Selective Metallization of Microcontact-Printed Patternscitations
- 2005Photoluminescence from undoped silicon after chemical etching combined with metal platingcitations
- 2004Electrochemically Induced Morphology and Volume Changes in Surface-Grafted Poly(ferrocenyldimethylsilane) Monolayerscitations
- 2004Ellipsometric characterisation of heterogeneous 2D layerscitations
- 2003Structural and optical characterization of porous anodic aluminium oxidecitations
- 2002Hysteresis in YHx films observed with in situ measurementscitations
- 2001Structural, electrical, and optical properties of La1-z YzHx switchable mirrorscitations
- 2001Structural, optical and electronic properties of LaMgHx switchable mirrorscitations
- 2000Quenching of Giant Hysteresis Effects in La1-zYzHx Switchable Mirrorscitations
Places of action
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article
Amplified responsiveness of multi-layered, polymer grafts: Synergy between brushes and hydrogels
Abstract
The responsive properties of surface-grafted polymer films in aqueous media can be amplified by covalently layering thermosensitive brushes and hydrogels. This was demonstrated by synthesizing layers of linear poly(N-isopropylacrylamide) (PNIPAM) brushes, alternating with cross-linked, poly(hydroxyethyl)methacrylate (PHEMA) hydrogels via sequential surface-initiated atom-transfer radical polymerization (SI-ATRP) steps. Below the lower critical solution temperature (LCST) of PNIPAM, brush/hydrogel multilayered films swell similarly to linear PNIPAM homopolymer brushes, as measured by liquid ellipsometry. In contrast, above the LCST, the PHEMA hydrogel interlayer acts as stiffening element within the collapsed multilayered film, as monitored by atomic force microscopy (AFM) nanoindentation and lateral force microscopy (LFM). This translates into a 10-fold increase in Young’s modulus by the collapsed, layered films compared to PNIPAM homopolymer analogues. The (macro)molecular continuity between the brush main chains and hydrogel constituents thus enables a chemically robust layering to form graded, quasi-3D grafted polymer architectures, which display a concerted and amplified temperature-triggered transition.