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Polyvinylpyrrolidone/graphene oxide thin films coated on quartz crystal microbalance electrode for NH_3 detection at room temperature

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Science China(Technological Sciences) 2016年第9期59卷 1377-1382页

作者： MA XingFang xie guangzhong SU YuanJie DU HongFei xie Tao JIANG YaDong School of Optoelectronic Information State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China (UESTC)

In this paper, composite film based on polyvinylpyrrolidone(PVP)/graphene oxide(GO) was fabricated by spray method on AT-cut 9.986 MHz quartz crystal microbalance(QCM) for NH_3 sensing. The thin films were characterized by scanning electron microscope(SEM), Fourier transform infrared spectroscopy(FTIR) and ultraviolet-visible spectroscopy(UV-VIS) to investigate the morphologies and the composition contents, respectively. The experimental results reveal that PVP/GO based sensor holds higher sensitivity, larger responsiveness and smaller baseline drift than those based on pure PVP at room temperature. Besides, the prepared sensor exhibits greater response to NH_3 than other gases such as CO, CO_2 and NO_2 at the same concentration. The good linearity, reproducibility and stability demonstrate the practicability of PVP/GO hybrid film in detecting NH_3.

关键词： polyvinylpyrrolidone graphene oxide quartz crystal microbalance NH3 gas sensor

Novel Quartz Crystal Microbalance Biosensor for Determination of Organophosphorous Dichlorvos

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稀有金属材料与工程 2006年第A03期35卷 282-283页

作者： Cuiping Chen guangzhong xie Hongjuan Zeng Yadong Jiang Key Laboratory of Electronic Thin Films and Integrated Devices School of Opto-electrical Information University of Electronic Science ＆ Technology of China Chengdu 610054 China

A novel quartz crystal microbalance (QCM) biosensor for the determination of organophosphorus pesticide,such as dichlorvos (DDVP),has been fabricated with poly (3,4-ethylenedioxythiophene)/Poly (4-styrenesulfonate) (PEDOT/PSS) and cholinesterase butyl (BuChE).It is found that PEDOT/PSS coated sensor exhibits the highest sensitivity for DDVP among PEDOT,polyvinyl pyrrolidone,polyvinyl alcohol and polyacrylic acid sensor *** conditions to prepare PEDOT/PSS coated sensor are *** sensitivity of the PEDOT/PSS hiosensor with BuChE is higher than the others without BuChE The determination of dichlorvos in the range from 400μg/g to 2400μg/g used PEDOT/PSS with BuChE coated hiosensor was obtained.

关键词： QCM biosensor DDVP cholinesterase PEDOT/PSS

The fabrication and optimization of OTFT formaldehyde sensors based on Poly(3-hexythiophene)/ZnO composite films

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Science China(Technological Sciences) 2013年第8期56卷 1877-1882页

作者： LI Xian JIANG YaDong TAI HuiLing xie guangzhong DAN WenChao State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic InformationUniversity of Electronic Science and Technology of China(UESTC)

Formaldehyde(HCHO),a colorless and pungent-smelling gas,is confirmed be a huge threat to human *** detection of formaldehyde is necessary and *** Poly(3-hexythiophene)(P3HT)/ZnO organic-inorganic composite thin film was fabricated and used as the sensitive layer of organic thin film transistors(OTFT) by spray-deposited method to detect HCHO at room *** process parameters such as P3HT/ZnO weight ratios and airbrushed masses were *** results showed that P3HT/ZnO OTFT exhibited good sensing response to *** mass of 1ml was the optimal mass,and the 1:1 and 1:5 weight ratios of P3HT/ZnO exhibited better sensing properties compared with *** gas sensors based on P3HT/ZnO composite film provides a novel promising approach to the detection of HCHO.

关键词： formaldehyde Poly(3-hexythiophene)/ZnO composite Organic Thin Film Transistors(OTFT)

The effect of MWCNTs on the performance of α-sexithiophene OTFT device and its gas-sensing property

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Science China(Technological Sciences) 2014年第6期57卷 1101-1108页

作者： TAI HuiLing ZHANG Bo DUAN ChengLi xie guangzhong JIANG YaDong State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic InformationUniversity of Electronic Science and Technology of China

In this paper,bottom contact organic thin-film transistor(OTFT)gas sensors were *** dioxide(SiO2)and titanium/aurum(Ti/Au)were used as the insulating layer and the electrode for the device,*** multi-walled carbon nanotubes(MWCNTs)/α-sexithiophene(α-6T)bilayer films were used as the active layer,andα-6T single layer sensitive film was also prepared for comparison *** electrical and trace NO2-sening properties of these two OTFT gas sensors were tested and *** results showed that,the OTFT device based on MWCNTs/α-6T bilayer had obviously better electrical properties,better stabilities and higher NO2-sening response values than the device withα-6T single layer,in which both the carrier mobility(μ)and on/off current ratio enhanced two order of *** improved performance of bilayer OTFT can be explained that MWCNTs acted as highly conducting bridges connecting the crystalline terraces in theα-6T *** voltage(VT),carrier mobility,on/off current ratio and grid current which showed extremely similar variation trend as source-drain current,were optional parameters to reveal the gas-sensing characteristic of OTFT gas *** analysis showed that the special feature of MWCNTs had certain influence on the gas-sensing properties.

关键词： MWCNTs α-6T organic thin-film transistor(OTFT) gas sensors NO2

A carbon monoxide sensor based on single-walled carbon nanotubes doped with copper chloride

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Science China(Technological Sciences) 2013年第10期56卷 2576-2580页

作者： ZHANG GuangDi TAI HuiLing xie guangzhong JIANG YaDong ZHOU Yong State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China (UESTC)

A carbon monoxide gas sensor based on single-walled carbon nanotube （SWCNT） has been developed for detection of carbon monoxide （CO） at room temperature. Copper chloride （CuC1） was mixed with SWNT by mechanical blending. The thin film was deposited on interdigitated electrodes by using airbrush technology. This paper described the fabrication of the sensor for detecting carbon monoxide with concentrations from 20 ppm to 100 ppm. The performance of CO gas sensor was measured by using relevant apparatus to obtain the continuous sensor electric resistance change on exposure to CO and air atmosphere at room temperature, respectively. The results exhibited that the senor presented a larger sensitivity and a good recoverability. The experimental results suggested the potential use of CuC1 doped SWCNT for CO detecting.

关键词： carbon monoxide gas sensor single-walled carbon nanotubes copper chloride room temperature

Preparation and Characterization of Polymeric PVDF/PDDA Ultrathin Films

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稀有金属材料与工程 2006年第A03期35卷 550-551页

作者： Yun Ye Yadong Jiang Yong Wang Zhiming Wu guangzhong xie School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 China

A new method for the production of nanoscaled polymeric multilayer films of ferroelectric PVDF is *** ultrathin multilayer films of poly diallyldimethylammonium chloride (PDDA) and polyvinylidene fluoride (PVDF) have been prepared on fuzed quartz substrate by the layer-by-layer self-assembly (LbL-SA) *** PDDA/PVDF multilayer films with the thickness of 30 nm to 150 nm have been characterized by quartz crystal microbalance (QCM) and infrared spectra (IR) The QCM reveals that the alternant ultrathin films of PVDF and PDDA are well order *** electric property of the ultrathin PDDA/PVDF multilayer films at room temperature is *** results show that property of ultrathin films differed from that of the thick films.

关键词： ultrathin films PVDF PDDA LbL-SA

Preparation and Characterization of PEDOT Films for NO_2 Gas Sensors

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稀有金属材料与工程 2006年第A03期35卷 178-179页

作者： Hongjuan Zeng Yadong Jiang guangzhong xie Junsheng Yu Cuiping Chen School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 China

A novel NO_2 gas sensor was constructed by depositing poly(3,4-ethylenedioxyphioen)(PEDOT)films on the surface of interdigital *** conducting polymer PEDOT films were prepared by chemical *** conductibility tests indicated that the resistances of PEDOT films increased with the increase of NO_2 *** mechanism of increasing resistance of PEDOT films could be suggested that electrons of NO_2-gas acted as the electron donor to p-type semiconductor of PEDOT with the consequence of reducing the numbers of holes in the PEDOT and the increase resistance of the thin *** linear relationship between the shift of resistance and the concentration of NO_2 existed in a range from 10μg/g to 30μg/*** sensitivity of PEDOT films to NO_2 was 10Ω/10^(-6).

关键词： conducting polymer preparation characterization NO2-sensitivity

Preparation of Nano-Crystalline ZnO Thin Films

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稀有金属材料与工程 2006年第A03期35卷 504-505页

作者： Huapin Chen guangzhong xie Tao Wang Yadong Jiang Lin Qiu Ministry of Education Key Laboratory of Novel Transducers School of Opto-electrical Information University of Electronic Science ＆ Technology of China Chengdu 610054 China

Zinc oxide (ZnO) thin films were identified as very suitable piezoelectric material for SAW on the basis of its relatively high electromechanical coupling coefficient,as well as high resistivity for low insertion loss and little distortion in the *** this paper ZnO thin films were deposited on Si(100) substrate covered with SiO_2 using a reactive DC magnetic sputtering system from a zinc *** effects of various deposition parameters on structural and performances have been investigated through *** and experimental results are also discussed in this *** showed that the prepared ZnO films had strongly c-axis *** composition of the film was also determined through high-resolution photoelectron spectroscopy (XPS).AFM showed that the films had smooth surface and that the crystallite sizes of deposited films were in the range 30 nm～50 *** above results showed that the films deposited by magnetic sputtering met the demands for surface acoustic wave (SAW) devices.

关键词： magnetic sputtering ZnO thin films SAW resistivity

Gas sensors for CO_2 detection based on RGO–PEI films at room temperature

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Chinese Science Bulletin 2014年第17期59卷 1999-2005页

作者： Yong Zhou Yadong Jiang guangzhong xie Mei Wu Huiling Tai School of Optoelectronic Information State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of China (UESTC)

In this paper,polyethyleneimine(PEI)and reduced graphene oxide(RGO)were selected as sensing materials for carbon dioxide *** kinds of sensors with different sensitive film structures,i.e.,RGO–PEI composite film and RGO–PEI bi-layer film were fabricated by airbrushing the sensitive films on interdigitated *** performances of both sensors at room temperature were *** showed that sensors with bi-layer film exhibited smaller baseline drift and more stable sensing characteristics than the counterparts with composite ***,bi-layer film sensors with different quantity of PEI solution deposited were *** of long-time stability,repeatability,low concentration of detection for carbon dioxide,and measurements of response time and recovery time were *** was found that appropriate weight ratio of RGO and PEI was critical for sensing *** addition,the sensor with bi-layer film exhibited a better repeatability but had longer response time and recovery time than RGO single-layer sensor,and both of them could detect as low as20 parts per million carbon dioxide *** responses of the prepared sensors to carbon dioxide under dry air or nitrogen were *** relevant sensing mechanisms were studied as well.

关键词：二氧化碳气体检测传感器薄膜结构室温二氧化碳传感器长期稳定性时间性能聚乙烯亚胺