| 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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Lebental, Bérengère
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2023Selective Outdoor Humidity Monitoring Using Epoxybutane Polyethyleneimine in a Flexible Microwave Sensorcitations
- 2022Electrical and Electrochemical Sensors Based on Carbon Nanotubes for the Monitoring of Chemicals in Water—A Reviewcitations
- 2022Comparing Commercial Metal-Coated AFM Tips and Home-Made Bulk Gold Tips for Tip-Enhanced Raman Spectroscopy of Polymer Functionalized Multiwalled Carbon Nanotubescitations
- 2019Optical chemosensors for metal ions in aqueous medium with polyfluorene derivatives: Sensitivity, selectivity and regenerationcitations
- 2018Oxidation-based continuous laser writing in vertical nano-crystalline graphite thin films
- 2018A graphene-based non-volatile memory
- 2017Graphitization and amorphization of textured carbon using high-energy nanosecond laser pulses
- 2016Oxidation-Based Continuous Laser Writing in Vertical Nano-Crystalline Graphite Thin Filmscitations
- 2016Nanosensors for sustainable cities - From fundamentals to deployments
- 2016Graphitization and amorphization of textured carbon using high-energy nanosecond laser pulsescitations
- 2015A graphene-based non-volatile memory
- 2014A Novel Weigh-In Motion Sensor Using An Asphalt-Embedded Thin Film of Graphene-On-Clay and Carbon-Nanotubes
- 2014An Innovative Nanosensor for Weigh-In-Motion Applications
- 2014An Innovative Nanosensor for Weigh-In-Motion Applications
- 2014Nanosecond-laser-induced graphitization and amorphization of thin nano-crystalline graphite films
- 2012Carbon nanotubes and graphene-based microsonar for embedded monitoring of microporosity
- 2012Visco-acoustic modelling of a vibrating plate interacting with water confined in a domain of micrometric sizecitations
- 2011Capacitive ultrasonic micro-transducer made of carbon nanotubes: prospects for the in-situ embedded non-destructive testing of durability in cementitious materialscitations
- 2011Aligned carbon nanotube based ultrasonic microtransducers for durability monitoring in civil engineeringcitations
- 2011Nanosensors for nanoscale structural health monitoring in civil engineering: new insight on carbon nanotubes devices
- 2010Instrumentation of cementitious materials by embedded ultrasonic micro-transducers made of carbone nanotubes : prospects for in-situ non-destructive testing of durability
- 2009In-situ non destructive testing of cementitous materials via embedded ultrasonic transducers made up of carbon nanotubes.
- 2009Carbon nanotubes based ultrasonic transducer: realization process, morphological and mechanical properties
Places of action
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article
Optical chemosensors for metal ions in aqueous medium with polyfluorene derivatives: Sensitivity, selectivity and regeneration
Abstract
Six polyfluorene derivatives, P1-P6, were synthesized and investigated as responsive materials for the optical sensing of metal ions in an aqueous medium. They were designed by combining carbazole with fluorene units within the backbone. Carbazole was N-functionalized with three coordinating groups, 2-pyridyl-benzimidazole (P1 and P4), 2-phenyl-benzimidazole (P2 and P5) and 4-phenyl-terpyridyl (P3 and P6), respectively. P1-P3 are random copolymers with fluorene:carbazole ratios of 9:1 for P1 and P2, and 9.7:0.3 for P3; P4-P6 are the corresponding alternating polymers. This design lead to polymers made of a conjugated backbone and pendant coordinating groups. The optical properties of the monomers were impacted in various ways by metal ions, and the formation of the [NiM3]2+ and [ZnM3]2+ and [ZnM32]2+ were evidenced with association constants of 105.22, 106.45 and 1014.0, respectively. The emission of the polymers was afterwards found to be influenced by theses metal ions with different sensitivity and selectivity. P1 was found to be more sensitive to the Ni2+ and Cu2+ ions with a better selectivity for Ni2+. Emission of the corresponding alternating polymer P4 was more efficiently quenched by these two ions with respect to P1, in addition of being sensitive to the Ca2+ and Al3+ ions. P3 showed sensitivity to the Ni2+, Cu2+, Al3+, Ca2+, and Zn2+ ions. The luminescence of P6 was much more pronounced with the Ni2+, Cu2+, Cd2+, Zn2+, Al3+, Fe2+, and Fe3+ ions with respect to P3. More remarkably, the presence of the Zn2+ or Cd2+ ions resulted in a new emission band, leading to the possibility to selectively sense these two ions. Relatively high Stern-Volmer constants (in the 106-105 range) were obtained, and sensitivities down to the ppb level were reached, especially for the Ni2+ ion. Influence of both the coordinating group and the polymer backbone on the polymers sensitivity and selectivity was emphasized. Finally, the recyclability of some representative optical sensors was shown both in solution and in the solid state. In particular, thin films were shown to be easily regenerated, which opens the way to the elaboration of reusable optical sensors.