Aligned carbon nanotube based ultrasonic microtransducers for durability monitoring in civil engineering

Abstract : Structural health monitoring of porous materials such as concrete is becoming a major component in our resource-limited economy, as it conditions durable exploitation of existing facilities. Durability in porous materials depends on nanoscale features which need to be monitored in situ with nanometric resolution. To address this problem, we put forward an approach based on the development of a new nanosensor, namely a capacitive micrometric ultrasonic transducer whose vibrating membrane is made of aligned single-walled carbon nanotubes (SWNT). Such sensors are meant to be embedded in large numbers within a porous material in order to provide information on its durability by monitoring in situ neighboring individual micropores. In the present paper, we report on the feasibility of the key building block of the proposed sensor: we have fabricated well-aligned, ultra-thin, dense SWNT membranes that show above-nanometer amplitudes of vibration over a large range of frequencies spanning from 100 kHz to 5 MHz.
Complete list of metadatas

Cited literature [25 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00707637
Contributor : Pierre Chainais <>
Submitted on : Wednesday, June 13, 2012 - 11:20:08 AM
Last modification on : Monday, July 8, 2019 - 11:26:03 AM
Long-term archiving on : Friday, September 14, 2012 - 2:25:43 AM

File

Lebental_Nanotechnology_2011.p...
Files produced by the author(s)

Identifiers

Citation

Bérengère Lebental, Pierre Chainais, Pascale Chenevier, Nicolas Chevalier, Eric Delevoye, et al.. Aligned carbon nanotube based ultrasonic microtransducers for durability monitoring in civil engineering. Nanotechnology, Institute of Physics, 2011, 22 (39), pp.395501. ⟨10.1088/0957-4484/22/39/395501⟩. ⟨hal-00707637⟩

Share

Metrics

Record views

846

Files downloads

401