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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

Surface morphology of the sensing film at the same magnification, (a) SnO2; (b) SnO2-PDDAC. The inset reports the EDX spectrum collected from the surface.
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f5-sensors-13-04378: Surface morphology of the sensing film at the same magnification, (a) SnO2; (b) SnO2-PDDAC. The inset reports the EDX spectrum collected from the surface.

Mentions: Figure 5 shows the SEM images and EDX spectra of SnO2 (Figure 5(a)) and SnO2-PDDAC (Figure 5(b)). The SnO2 nano-particles in the SnO2-PDDAC film are more uniformly dispersed than in SnO2 film. This may be attributed to the interaction between SnO2 and PDDAC. PDDAC is a polyelectrolyte, so the electrostatic interaction between the SnO2 and PDDAC, together with the steric effect of the polymer [26] are likely to prevent the metal oxide from aggregating and make the hybrid materials have uniform grain size.


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)

Surface morphology of the sensing film at the same magnification, (a) SnO2; (b) SnO2-PDDAC. The inset reports the EDX spectrum collected from the surface.
© Copyright Policy
Related In: Results  -  Collection

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

f5-sensors-13-04378: Surface morphology of the sensing film at the same magnification, (a) SnO2; (b) SnO2-PDDAC. The inset reports the EDX spectrum collected from the surface.
Mentions: Figure 5 shows the SEM images and EDX spectra of SnO2 (Figure 5(a)) and SnO2-PDDAC (Figure 5(b)). The SnO2 nano-particles in the SnO2-PDDAC film are more uniformly dispersed than in SnO2 film. This may be attributed to the interaction between SnO2 and PDDAC. PDDAC is a polyelectrolyte, so the electrostatic interaction between the SnO2 and PDDAC, together with the steric effect of the polymer [26] are likely to prevent the metal oxide from aggregating and make the hybrid materials have uniform grain size.

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