Nanostructured and functionalized cantilever for sensing organophosphorous compounds - Archive ouverte HAL
Communication Dans Un Congrès Année : 2019

Nanostructured and functionalized cantilever for sensing organophosphorous compounds

Résumé

Vertically aligned TiO2 nanorods have been successfully synthesized on the micrometric surface of a cantilever by a two-step procedure involving solvothermal method. Adjusting TiO2 synthesis conditions, first optimized on centimetric silicon substrate, allowed to well-control the morphology of the nanorods, aimed to increase the collection surface of this micromechanical sensor. By using the nanostructured microcantilever for the detection of organophosphorous agent (OPs), a frequency shift of 833 Hz corresponding to a remarkable enhancement of the sensor sensitivity by a factor of 75 compared to a pristine cantilever is achieved. Moreover, functionalization of this nanostructured cantilever with a tailored functional oxime molecule having strong affinity with OPs compounds significantly improved the performance of the sensor in vapor phase. A frequency shift of 1319 Hz is obtained at 500 ppm of DMMP with the functionalized sensor.
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Dates et versions

hal-03091804 , version 1 (04-01-2021)

Identifiants

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Urelle Biapo, Alessio Ghisolfi, Geoffrey Gerer, Denis Spitzer, Valerie Keller, et al.. Nanostructured and functionalized cantilever for sensing organophosphorous compounds. 2019 IEEE SENSORS, Oct 2019, Montreal, Canada. ⟨10.1109/SENSORS43011.2019.8956854⟩. ⟨hal-03091804⟩
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