| 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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Cunin, Frédérique
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Size-tunable silicon nanoparticles synthesized in solution via a redox reactioncitations
- 2023Upscale Synthesis of Magnetic Mesoporous Silica Nanoparticles and Application to Metal Ion Separation: Nanosafety Evaluationcitations
- 2023Nanostructured Porous Silicon for Bone Tissue Engineering: Kinetics of Particle Degradation and Si-Controlled Releasecitations
- 2018Elaboration and Characterization of Porous Silicon multilayer for biomaterial applications
- 2018Elaboration and Characterization of Porous Silicon multilayer for biomaterial applications
- 2013Interaction of Antibiotics with Lipid Vesicles on Thin Film Porous Silicon Using Reflectance Interferometric Fourier Transform Spectroscopycitations
- 2011Dental Pulp Stem Cells Adhesion/Proliferation On Porous Silicon Scaffold
- 2007Confinement of Thermoresponsive Hydrogels in Nanostructured Porous Silicon Dioxide Templatescitations
- 2007Confinement of Thermoresponsive Hydrogels in Nanostructured Porous Silicon Dioxide Templatescitations
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article
Confinement of Thermoresponsive Hydrogels in Nanostructured Porous Silicon Dioxide Templates
Abstract
A thermoresponsive hydrogel, poly(N-isopropylacrylamide) (poly(NIPAM)), is synthesized in-situ within an oxidized porous Si template, and the nanocomposite material is characterized. Infiltration of hydrogel into the interconnecting nanometer-scale pores of the porous SiO2 host is confirmed by scanning electron microscopy. The optical reflectivity spectrum of the nanocomposite hybrid displays Fabry-Pérot fringes characteristic of thin film interference, enabling direct, real-time observation of the volume phase transition of the confined poly(NIPAM) hydrogel. Reversible optical reflectivity changes are observed to correlate with the temperature-dependent volume phase transition of the hydrogel, providing a new means of studying nanometer-scale confinement of responsive hydrogels. The nano-confined hydrogel displays a swelling and shrinking response to changes in temperature that is significantly faster than for the bulk hydrogel. The porosity and pore size of the SiO2 template, which are precisely controlled by the electrochemical synthesis parameters, strongly influence the extent and rate of changes in the reflectivity spectrum of the nano-composite. The observed optical response is ascribed to changes in both the mechanical and the dielectric properties of the nano-composite.