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- W2400144888 abstract "Amorphous nanomaterials have attracted attention due to their excellent performances, highly comparable to their crystalline counterparts. Sensor materials with amorphous phases are usually evaluated to be unsuitable for sensors because of poor performance. As a matter of fact, amorphous nanomaterials have rather unique sensor behaviors. Here, we report the amorphousization of cobalt monoxide (CoO) nanocrystals driven by a unique process involved in laser ablation in liquid (LAL). We also established that a fast and nonequilibrium process created by LAL results in the amorphousization of nanocrystals. The as-prepared amorphous CoO (a-CoO) nanoflakes possess a high aspect ratio, which showed good sensing of explosive gases. The fabricated gas sensor can detect CO and H2 at levels as low as 5 and 10 ppm, respectively, at 100 °C. The performance characteristics of this sensor, including high sensitivity, low working temperature, and low detection limit, are superior to those of sensors made with crystalline phase oxides. Meanwhile, a temperature-dependent p-n transition was observed in the sensor's response to CO, suggesting that the sensing properties can be tailored by changing the carrier type, thus tuning the selectivity of sensors to different gases. These findings demonstrate the potential applications of amorphous nanomaterials as gas sensor components." @default.
- W2400144888 created "2016-06-24" @default.
- W2400144888 creator A5040498751 @default.
- W2400144888 creator A5041169422 @default.
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- W2400144888 date "2015-09-22" @default.
- W2400144888 modified "2023-09-27" @default.
- W2400144888 title "Amorphization of cobalt monoxide nanocrystals and related explosive gas sensing applications" @default.
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- W2400144888 doi "https://doi.org/10.1088/0957-4484/26/41/415501" @default.
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