Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 187, Issue -, Pages 118-127Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.09.074
Keywords
Cantilever resonator; Airborne engineered nanoparticle; Electrostatic sampler; Mass sensitivity
Funding
- German Federal Ministry of Education and Research (BMBF) within the cluster NanoCare [03X0098A]
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A portable cantilever-based airborne nanoparticle detector (CANTOR) was designed and manufactured for detecting engineered nanoparticles (ENPs) in workplace air by monitoring the resonant frequency shift induced by the mass of the particles trapped on the cantilever resonator. The CANTOR consists of two main modules, i.e., a silicon resonant cantilever sensor and a miniaturized electrostatic ENP sampler. Tested in 15-min aerosol sampling with similar to 100 nm carbon-based ENPs having a concentration of similar to 6000 NPs/cm(3), the sensor exhibited a mass sensitivity of 36.51 Hz/ng when the second resonant mode was used. Two simple cleaning methods, i.e., dry and wet cleanings, to remove the attached ENPs were successfully demonstrated in order to extend the operating life of the sensor. (C) 2012 Elsevier B. V. All rights reserved.
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