Nanosensors and civil enginnering Monitoring pore sizes with ultrasounds Monitoring pore humidity with CNTFET Nanosensors for structural monitoring in civil engineering New insight on promising carbon nanotubes devices B. Lebental 1 F. Bourquin 1 E. Norman 2 C. S. Cojocaru 2 A. Ghis 3 1 Universit´ e Paris-EST, IFSTTAR, Paris, 75015, FRANCE 2 LPICM, Ecole Polytechnique, Palaiseau, 91128, France 3 CEA-LETI, Minatec Campus, Grenoble, 38000, FRANCE NDCM-XII [email protected]Nanosensors in civil engineering 1/14
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Nanosensors for structural monitoring in civil engineering · Nanosensors and civil enginnering Monitoring pore sizes with ultrasounds Monitoring pore humidity with CNTFET Concrete
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Nanosensors and civil enginneringMonitoring pore sizes with ultrasounds
Monitoring pore humidity with CNTFET
Nanosensors for structural monitoring in civilengineering
New insight on promising carbon nanotubes devices
B. Lebental1 F. Bourquin1 E. Norman2 C. S. Cojocaru2
A. Ghis3
1Universite Paris-EST, IFSTTAR, Paris, 75015, FRANCE
2LPICM, Ecole Polytechnique, Palaiseau, 91128, France
3CEA-LETI, Minatec Campus, Grenoble, 38000, FRANCE
Nanosensors and civil enginneringMonitoring pore sizes with ultrasounds
Monitoring pore humidity with CNTFET
Carbon nanotubes field-effect transistor
Nanotube network as semi-conducting channel of a transistorFabricated by low-density deposition of SWNT on an insulatoratop gate electrodeCNTFET known to be highly sensitive to humidity :a drawback for electronics, an opportunity to us
Electrical features reproducibly sensitive to humidity
Ion, Ioff , Hysteresis,...Attributed to adsorption on silicon and on metalEspecially at high humidity
⇒ Well suited for high RH environment such as concrete
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Nanosensors and civil enginneringMonitoring pore sizes with ultrasounds
Monitoring pore humidity with CNTFET
Conclusions
Fabrication and evaluation of two promising sensing elementsVibrating CNT membranes for ultrasonic micropore monitoringCNTFET for humidity measurements in micropores
⇒ Two examples among various novel sensing opportunitiesProspects :
Integration into embeddable sensing units : smart aggregatesBenchmarking in the target environment : project Sense-citya real-scale benchmarking facility to be available in the nextfew years for (your ?) sensors dedicated to urbanmeasurement : buildings, infrastructures, networks...