Nanocomposite sensitive polymeric films for SAW sensors deposited by the MAPLE direct write technique
| Autor: | Constantin Grigoriu, Ionut Nicolae, Cristian Viespe |
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| Rok vydání: | 2011 |
| Předmět: |
Detection limit
Maple Materials science Nanocomposite business.industry Scattering Surface acoustic wave Metals and Alloys Analytical chemistry Nanoparticle engineering.material Condensed Matter Physics Evaporation (deposition) Surfaces Coatings and Films Electronic Optical and Magnetic Materials Materials Chemistry engineering Deposition (phase transition) Optoelectronics Electrical and Electronic Engineering business Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 158:418-422 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2011.06.050 |
| Popis: | A matrix-assisted pulsed laser evaporation direct write (MAPLE-DW) deposition technique was used to improve the properties of sensitive layers used in surface acoustic wave (SAW) sensors. In contrast with conventional deposition methods, MAPLE-DW allows the synthesis of uniform nanocomposite layers based on nanoparticles, in a special configuration that significantly reduces the energy loss by wave scattering. Ethanol, methanol, and toluene vapor were used as the target gases. The study compared sensors with polyethylenimine sensitive films and nanocomposite polymeric films based on SiO 2 /Si nanoparticles (deposited by spray coating), and nanocomposite layers based on SiO 2 nanoparticles (deposited by MAPLE-DW). The sensors made from sensitive layers deposited by MAPLE-DW exhibited 3–5 times the sensitivity and 10–40 times the detection limit of the sensors deposited by spray coating. |
| Databáze: | OpenAIRE |
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