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- W2102319261 endingPage "445501" @default.
- W2102319261 startingPage "445501" @default.
- W2102319261 abstract "We fabricated nanoparticle-based gas through in situ ac dielectrophoretical assembling of drop-coated SnO(2) nanoparticles to bridge the gap between electrodes with high aspect ratio. While the conventional dielectrophoresis (DEP) adopts a microfluidic system for continuous flow of the solution during the process, we just drop-coated a small amount of solution onto the electrodes and executed in situ DEP for a very short time. This is a very simple, cost-effective, time-saving, and highly reproducible process. We fixed the duration time and applied voltage for the DEP at 1 s and 1 V respectively and changed the frequencies from 1 up to 500 kHz. I-V characteristics of the samples were checked and it was found that DEP samples fabricated at 1 s, 1 V and 150 kHz conditions showed considerably higher connectivity of the nanoparticles. This can be attributed to the excellent step coverage achieved by ac DEP under those conditions. The devices drop-coated and dielectrophoretically assembled at other ac frequency conditions showed poor connectivity. Hydrogen gas sensing properties of the sensors fabricated under 1 s, 1 V and 150 kHz conditions were checked by flowing through 160 ppm H(2). The sensitivity reaches a maximum value of ~ 700% at 350 °C. The response time is ~ 200 s at 350 °C." @default.
- W2102319261 created "2016-06-24" @default.
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- W2102319261 date "2011-10-11" @default.
- W2102319261 modified "2023-09-25" @default.
- W2102319261 title "Hydrogen sensing properties of dielectrophoretically assembled SnO2nanoparticles on CMOS-compatible micro-hotplates" @default.
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- W2102319261 doi "https://doi.org/10.1088/0957-4484/22/44/445501" @default.
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