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A novel flexible room temperature ethanol gas sensor based on SnO2 doped poly-diallyldimethylammonium chloride.

Zhan S, Li D, Liang S, Chen X, Li X - Sensors (Basel) (2013)

Bottom Line: The polyimide (PI) substrate-based sensor was formed by depositing a mixture of SnO2 nanopowder and poly-diallyldimethylammonium chloride (PDDAC) on as-patterned interdigitated electrodes.We found that the response of SnO2-PDDAC sensor is significantly higher than that of SnO2 alone, indicating that the doping with PDDAC effectively improved the sensor performance.The SnO2-PDDAC sensor has a detection limit of 10 ppm at room temperature and shows good selectivity to ethanol, making it very suitable for monitoring drunken driving.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Nano-Fabrication and Novel Devices Integrated Technology, Institute of Microelectronics, Chinese Academy of Science, Beijing 100029, China. zhanshuang@ime.ac.cn

ABSTRACT
A novel flexible room temperature ethanol gas sensor was fabricated and demonstrated in this paper. The polyimide (PI) substrate-based sensor was formed by depositing a mixture of SnO2 nanopowder and poly-diallyldimethylammonium chloride (PDDAC) on as-patterned interdigitated electrodes. PDDAC acted both as the binder, promoting the adhesion between SnO2 and the flexible PI substrate, and the dopant. We found that the response of SnO2-PDDAC sensor is significantly higher than that of SnO2 alone, indicating that the doping with PDDAC effectively improved the sensor performance. The SnO2-PDDAC sensor has a detection limit of 10 ppm at room temperature and shows good selectivity to ethanol, making it very suitable for monitoring drunken driving. The microstructures of the samples were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscope (TEM) and Fourier transform infrared spectra (FT-IR), and the sensing mechanism is also discussed in detail.

No MeSH data available.


Related in: MedlinePlus

Response of SnO2-PDDAC sensor to ethanol of different concentrations.
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f3-sensors-13-04378: Response of SnO2-PDDAC sensor to ethanol of different concentrations.

Mentions: Figure 3 shows the response of SnO2-PDDAC sensor to different concentrations of ethanol. The detection limit of our sensor is 10 ppm at room temperature, but noticeable drift of base resistance was observed after each response-recovery cycle, and similar phenomenon can be observed in Figure 2(a), which may be related to the incomplete desorption of gas on the sensor at room temperature. Such incomplete gas adsorption prolongs the recovery time [25], and the drift amplitude is observed to increases continuously with increasing the gas concentration. Further research is required to understand the interrelation between the gas concentration and the gas adsorption.


A novel flexible room temperature ethanol gas sensor based on SnO2 doped poly-diallyldimethylammonium chloride.

Zhan S, Li D, Liang S, Chen X, Li X - Sensors (Basel) (2013)

Response of SnO2-PDDAC sensor to ethanol of different concentrations.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3673089&req=5

f3-sensors-13-04378: Response of SnO2-PDDAC sensor to ethanol of different concentrations.
Mentions: Figure 3 shows the response of SnO2-PDDAC sensor to different concentrations of ethanol. The detection limit of our sensor is 10 ppm at room temperature, but noticeable drift of base resistance was observed after each response-recovery cycle, and similar phenomenon can be observed in Figure 2(a), which may be related to the incomplete desorption of gas on the sensor at room temperature. Such incomplete gas adsorption prolongs the recovery time [25], and the drift amplitude is observed to increases continuously with increasing the gas concentration. Further research is required to understand the interrelation between the gas concentration and the gas adsorption.

Bottom Line: The polyimide (PI) substrate-based sensor was formed by depositing a mixture of SnO2 nanopowder and poly-diallyldimethylammonium chloride (PDDAC) on as-patterned interdigitated electrodes.We found that the response of SnO2-PDDAC sensor is significantly higher than that of SnO2 alone, indicating that the doping with PDDAC effectively improved the sensor performance.The SnO2-PDDAC sensor has a detection limit of 10 ppm at room temperature and shows good selectivity to ethanol, making it very suitable for monitoring drunken driving.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Nano-Fabrication and Novel Devices Integrated Technology, Institute of Microelectronics, Chinese Academy of Science, Beijing 100029, China. zhanshuang@ime.ac.cn

ABSTRACT
A novel flexible room temperature ethanol gas sensor was fabricated and demonstrated in this paper. The polyimide (PI) substrate-based sensor was formed by depositing a mixture of SnO2 nanopowder and poly-diallyldimethylammonium chloride (PDDAC) on as-patterned interdigitated electrodes. PDDAC acted both as the binder, promoting the adhesion between SnO2 and the flexible PI substrate, and the dopant. We found that the response of SnO2-PDDAC sensor is significantly higher than that of SnO2 alone, indicating that the doping with PDDAC effectively improved the sensor performance. The SnO2-PDDAC sensor has a detection limit of 10 ppm at room temperature and shows good selectivity to ethanol, making it very suitable for monitoring drunken driving. The microstructures of the samples were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscope (TEM) and Fourier transform infrared spectra (FT-IR), and the sensing mechanism is also discussed in detail.

No MeSH data available.


Related in: MedlinePlus