| 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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document
Carbon nanotubes based ultrasonic transducer: realization process, morphological and mechanical properties
Abstract
For instrumentation of microporosity in cementitous materials, carbon nanotubes based capacitive ultrasonic transducers (cMUT) are promising sensors. Their interest lies in the combination of high working frequencies (1 GHz) with small dimensions (1 µm²). In the proposed device, the cMUT membrane is made of aligned single-walled carbon nanotubes (SWNT) bridging a gap over a command electrode. We will describe the realization process of the vibrating membrane and its characterizations. First step of the device realization is the dispersion of SWNTs in N-methylpyrrolidone. Then, nanotubes are aligned by dielectrophoresis (DEP) between metallic electrodes onto a SiO2 substrate. A metallic layer is deposited over the electrodes edges to prevent nanotubes from slipping when suspended. The underlying SiO2 is then etched to release the membrane. Relevant features of the membrane are nanotubes alignment and density. Via SEM imaging, we have linked them with DEP operating parameters, in agreement with theoretical properties of DEP. To put a figure on membrane features, we are working on SEM image processing for nanotubes recognition. The method is based on advanced noise removal and contrast enhancement. First results of identification and measurement of intermeshed nanotubes on SEM pictures will be presented. We also mapped the Young's modulus of a suspended membrane using an AFM in contact mode, over surfaces of about 1 µm² surface. It opens the way for calculation of localized Young modulus, Poisson's ratio and thickness measurement of the membrane. We will check for correlations between mechanical data and quantitative properties of the deposition obtained from image processing. The optimization of membrane realization process and characterization techniques are presented, describing the present progress of our cMUT project. Next step will be actuation of the membrane to demonstrate vibrations at low frequency.