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| 1 | The fabrication and optimization of OTFT formaldehyde sensors based on Poly(3-hexythiophene)/ZnO composite films显示文摘Formaldehyde(HCHO),a colorless and pungent-smelling gas,is confirmed be a huge threat to human health.The detection of formaldehyde is necessary and important.The 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 temperature.The process parameters such as P3HT/ZnO weight ratios and airbrushed masses were optimized.The results showed that P3HT/ZnO OTFT exhibited good sensing response to HCHO.Airbrushed 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 others.OTFT gas sensors based on P3HT/ZnO composite film provides a novel promising approach to the detection of HCHO. | LI Xian JIANG YaDong TAI HuiLing XIE GuangZhong DAN WenChao | 2013 | Science China(Technological Sciences)2013，56，8： | 3 |
| 2 | Flexible organic thin-film transistors based on poly(3-hexylthiophene) films for nitrogen dioxide detection显示文摘Flexible nitrogen dioxide(NO_2) gas sensors based on organic thin-film transistors(OTFTs) were developed in this work, in which conductive indium tin oxide(ITO) coated polyethylene naphthalene-2,6-dicarboxylate(PEN) was designed for the flexible substrates, and poly methyl methacrylate(PMMA) and poly(3-hexylthiophene)(P3HT) was spin-coated as the gate dielectric layer and spray-deposited as the active layer, respectively. The effects of PMMA concentrations and P3HT solution volume on performances of flexible OTFTs were systematically investigated. The results showed that the optimized flexible OTFT exhibited high field-effect mobility(9.51×10^(–3) cm^2/(V s) at a gate bias of –50 V) and excellent response characteristics,including high sensitivity(up to 0.169 ppm^(–1)), good repeatability and selectivity. The flexibility of the developed OTFT sensor was also investigated, and the results showed that the electrical and gas-sensing properties were affected by the bending cycles,thus further work should be done for improving the flexibility of the sensor. This work provides an effective approach in developing high performance flexible OTFT NO_2 gas sensor. | YANG Jing XIE GuangZhong SU YuanJie ZHANG QiuPing DU HongFei TAI HuiLing DU XiaoSong JIANG YaDong | 2018 | Science China(Technological Sciences)2018，61，11： | 3 |
| 3 | Gas sensors for CO_2 detection based on RGO–PEI films at room temperature显示文摘In this paper,polyethyleneimine(PEI)and reduced graphene oxide(RGO)were selected as sensing materials for carbon dioxide detection.Two 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 electrodes.Response performances of both sensors at room temperature were investigated.Results showed that sensors with bi-layer film exhibited smaller baseline drift and more stable sensing characteristics than the counterparts with composite film.Furthermore,bi-layer film sensors with different quantity of PEI solution deposited were studied.Performances of long-time stability,repeatability,low concentration of detection for carbon dioxide,and measurements of response time and recovery time were investigated.It was found that appropriate weight ratio of RGO and PEI was critical for sensing response.In 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 gas.Sensing responses of the prepared sensors to carbon dioxide under dry air or nitrogen were compared.The relevant sensing mechanisms were studied as well. | Yong Zhou Yadong Jiang Guangzhong Xie Mei Wu Huiling Tai | 2014 | Chinese Science Bulletin2014，59，17： | 2 |
| 4 | Adsorption behaviors of gas molecules on the surface of ZnO nanocrystals under UV irradiation显示文摘A UV-activated room temperature chemiresistive gas sensor based on ZnO nanocrystals film was fabricated. Its gas sensing properties under various conditions were also investigated in detail. The results shed new insight into the adsorption behaviors of gas molecules on the surface of ZnO nanocrystals under UV irradiation. The chemisorbed oxygen species(O^-2(ads)(hv)) induced by UV light govern the adsorption and desorption ways of other gas molecules on the surface of ZnO nanocrystals, which is dependent on the electron affinity of gas molecules. Gas molecules with higher electron affinity than oxygen molecules can be adsorbed on the surface by the competitive adsorption way, extracting electrons from the surface. Gas molecules with lower electron affinity than oxygen molecules are attracted by the adsorbed O^-2(ads)(hv)layer, releasing electrons to the surface. These processes can influence the gas sensing properties of the sensor. Our findings will pave the way for the fundamental understanding and design of UV-activated gas sensor in the future. | ZHANG QiuPing XIE GuangZhong DU HongFei YANG Jing SU YuanJie TAI HuiLing XU Ming ZHAO Kang | 2019 | Science China(Technological Sciences)2019，62，12： | 1 |
| 5 | Wearable and washable textile-based strain sensors via a single-step, environment-friendly method显示文摘Recently, soft and stretchable strain sensors that can be incorporated into textiles have attracted significantly increasing interest for use in a diverse range of applications. However, the simple fabrication of stretchable devices that exhibit excellent sensing performance, are highly durability and are a good fit to the human body remains a challenge. Herein, we describe the fabrication of a new flexible strain sensor on a traditional polyester fabric using a one-step method that involves the reduction of graphene oxide(GO) using ascorbic acid(L-AA). The resulting textile-based strain sensors could be washed, exhibited long-term stability,and had a negative linear response that gave a good sensing response when used in wearable applications. In addition to effectively detecting human motions, the textile was modified such that it could detect ultra-large deformations. The impressive mechanical performance, durability and the ability to capture and monitor a variety of human actions and motions mean that these textile-based sensors have great potential in biomonitoring, soft co-robotics, and human-machine interactions. | SUN Teng JIANG YaDong DUAN ZaiHua YUAN Zhen WANG Yang TAI HuiLing | 2021 | Science China(Technological Sciences)2021，64，2： | 1 |
| 6 | Influence of polymerization temperature on NH3 response of PANI/TiO2 thin film gas sensor 显示文摘 | Tai Huiling Jiang Yadong Xie Guangzhong | 2008 | Sensors and Actuators B: Chemical2008，129，1： | 1 |
| 7 | Fabrication and gas sensitivity of polyaniline–titanium dioxide nanocomposite thin film显示文摘 | Huiling Tai Yadong Jiang Guangzhong Xie Junsheng Yu Xuan Chen | 2007 | Sensors & Actuators: B Chemical2007，，2： | 1 |
| 8 | A carbon monoxide sensor based on single-walled carbon nanotubes doped with copper chloride显示文摘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(CuCl)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 CuCl doped SWCNT for CO detecting. | ZHANG GuangDi TAI HuiLing XIE GuangZhong JIANG YaDong ZHOU Yong | 2013 | Science China(Technological Sciences)2013，56，10： | 1 |
| 9 | Detection of 2,4-dinitrotoluene using hydrogen-bond acidic polymer coated SAW sensor显示文摘A strong hydrogen-bond acidic(HBA)polymer linear fluoroalcoholic polysiloxane(PLF),synthesized by one-step hydrosilylation,was introduced for 2,4-dinitrotoluene(2,4-DNT)detection using surface acoustic wave(SAW)devices.FT-IR spectra and1H NMR spectra characterizations confirmed its molecular structure.Then,PLF was dissolved in chloroform,and spray coated onto a434 MHz SAW device.And subsequently,the sensitivity and selectivity of the fabricated sensor were studied based on a SAW test platform.To 2,4-DNT of 1 ppm and 100 ppb(for DNT,1 ppm=8.1 mg/m3;1 ppb=8.1 lg/m3),the responses of the sensor rose 7.7 and 1.5 kHz,respectively.Furthermore,compared with some common interference vapors at 10 mg/m3,the response of the sensor to 2,4-DNT at1 ppm was 5 times stronger.The sensitive property was attributed to the hydrogen bond interaction between the hexafluoroisopropanol(HFIP)group in PLF and the basic lone electron pairs of nitro-groups in 2,4-DNT.Comparison between the PLF sensor and hydroxyl group functionalized polymer(carbowax and MOBCD)-coated sensors was investigated,and the results showed that the PLF sensor exhibited better sensitivity.In a word,the PLF sensor exhibited fast response,negligible baseline drifts and excellent reversibility,indicating good candidates of HFIP group functionalized HBA polymers for practical nitroaromatic explosives detection. | Yang Wang Xiaosong Du Yin Long Huiling Tai Yadong Jiang | 2014 | Chinese Science Bulletin2014，59，21： | 0 |
| 10 | Preparation of bilayer/three-layer PEO-carbon nanotube composite thin films and their toluene-sensing application显示文摘The bilayer poly(ethylene oxide)/multiple-walled carbon nanotubes(PEO/MWCNTs) and three-layer PEO/MWCNTs/PEO composite thin films were fabricated with the spraying process on the interdigitated transducers(IDTs) as gas sensors for toluene-sensing application.Compared with the bilayer thin film sensor,the sensor with three-layer thin films exhibited higher response values and better recovery property.The microstructures of sensing films were characterized by scanning electron microscopy(SEM) to indicate that the better sensing response of three-layer thin films might be ascribed to the sufficient adsorption of toluene molecules on the surfaces of upper and bottom PEO films.The selectivity of the three-layer film sensor was further investigated by comparing responses upon exposure to different interference vapors with the response to toluene exposure,and much higher response was observed in the case of toluene.Good repeatability of the three-layer film sensor was also observed. | TAI HuiLing LIAO Jian DAN WenChao DUAN ChengLi LI Xian | 2013 | Science China(Technological Sciences)2013，56，5： | 0 |
| 11 | The effect of MWCNTs on the performance of α-sexithiophene OTFT device and its gas-sensing property显示文摘In this paper,bottom contact organic thin-film transistor(OTFT)gas sensors were prepared.Silicon dioxide(SiO2)and titanium/aurum(Ti/Au)were used as the insulating layer and the electrode for the device,respectively.The 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 purpose.The electrical and trace NO2-sening properties of these two OTFT gas sensors were tested and analyzed.The 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 magnitude.The improved performance of bilayer OTFT can be explained that MWCNTs acted as highly conducting bridges connecting the crystalline terraces in theα-6T film.Threshold 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 sensors.Morphology analysis showed that the special feature of MWCNTs had certain influence on the gas-sensing properties. | TAI HuiLing ZHANG Bo DUAN ChengLi XIE GuangZhong JIANG YaDong | 2014 | Science China(Technological Sciences)2014，57，6： | 0 |
| 12 | One-pot preparation and applications of self-healing,self-adhesive PAA-PDMS elastomers显示文摘A new family of transparent,biocompatible,self-adhesive,and self-healing elastomer has been developed by a convenient and efficient one-pot reaction between poly(acrylic acid)(PAA)and hydroxyl-terminated polydimethylsiloxane(PDMSOH).The condensation reaction between PAA and PDMS-OH has been confirmed by attenuated total reflection Fourier transform infrared(ATR-FTIR)spectra.The prepared PAA-PDMS elastomers possess robust mechanical strength and strong adhesiveness to human skin,and they have fast self-healing ability at room temperature(in^10 s with the efficiency of 98%).Specifically,strain sensors were fabricated by assembling PAA-PDMS as packaging layers and polyetherimide-reduced graphene oxide(PEI-rGO)as strain-sensing layers.The PAA-PDMS/PEI-rGO sensors are stably and reliably responsive to slight physical deformations,and they can be attached onto skin directly to monitor the body’s motions.Meanwhile,strain sensors can self-heal quickly and completely,and they can be reused for the motion detecting after shallowly scratching the surface.This work provides new opportunities to manufacture high performance self-adhesive and self-healing materials. | Yujin Yao Huiling Tai Dongsheng Wang Yadong Jiang Zhen Yuan Yonghao Zheng | 2019 | Journal of Semiconductors2019，40，11： | 0 |
| 13 | High performance ethylene sensor based on palladium-loaded tin oxide:Application in fruit quality detection显示文摘Ethylene(C2 H4),as a plant hormone,its emission can be served as an indicator to measure fruit quality.Due to the limited physiochemical reactivity of C2 H4,it is a challenge to develop high performance C2 H4 sensors for fruit detection.Herein,this paper presents a resistive-type C2 H4 sensor based on Pd-loaded tin oxide(SnO2).The C2 H4 sensing performance of proposed sensor are tested at optimum operating temperature(250℃)with ambient relative humidity(51.9%RH).The results show that the response of Pd-loaded SnO2 sensor(11.1,Ra/Rg)is about 3 times higher than that of pristine SnO2(3.5)for 100 ppm C2 H4.The response time is also significantly shortened from 7 s to 1 s compared with pristine SnO2.Especially,the Pd-loaded SnO2 sensor possesses good sensitivity(0.58 ppm 1)at low concentration(0.05-1 ppm)with excellent linearity(R2=0.9963)and low detection limit(50 ppb).The high sensing performance of Pd-loaded SnO2 are attributed to the excellent adsorption and catalysis effects of Pd nanoparticle.Meaningfully,the potential applications of C2 H4 sensor are performed for monitoring the maturity and freshness of fruits,which presents a promising prospect in fruit quality evaluation. | Qiuni Zhao Zaihua Duan Zhen Yuan Xian Li Si Wang Bohao Liu Yajie Zhang Yadong Jiang Huiling Tai | 2020 | Chinese Chemical Letters2020，31，8： | 0 |
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