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humidity sensing Properties of the Sensor Based on V-doped Nanoporous Ti0.9Sn0.1O2 Thin Film

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Chinese Journal of Chemistry 2012年第4期30卷 842-846页

作者： Anbia, Mansoor Moosavi Fard, Seyyed Ebrahim Shafiei, Korosh Hassanzadeh, Mohammad Ali Mayahipour, Abbas Research Laboratory of Nanoporous Materials Faculty of Chemistry Iran University of Science and Technology Farjam Street Narmak Tehran 16846 Iran Faculty of Chemical Engineering Iran University of Science and Technology Narmak Tehran Iran Institute for Chemical Research and Technology Tehran Iran

Vanadium doped nanoporous Ti0.9Sn0.1O2 thin film has been prepared on an alumina substrate by sol-gel method with Pluronic P123 as the organic template, and humidity sensing properties of it has been investigated. It is found that V-doped nanoporous Ti0.9Sn0.1O2 thin film shows good humidity sensing properties, and impendence of it de- creases more than four orders of magnitude in the relative humidity （RH） range of 11%--95% at 25 ℃. The response and recovery time of this sensor are about 13 and 17 s, respectively. High sensitivity, narrow hysteresis loop, rapid response and recovery, prominent stability and good repeatability are obtained. A possible mechanism is sug- gested to explain the humidity sensitive properties.

关键词： humidity sensing nanoporous V-doped

humidity sensing properties of La^(3+)/Ce^(3+)-doped TiO_2-20 wt.% SnO_2 thin films derived from sol-gel method

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维普期刊数据库

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Journal of Rare Earths 2010年第1期28卷 123-127页

作者：李红霞史志铭刘红伟 School of Materials Science and Engineering Inner Mongolia University of Technology Inner Mongolia Research Center of Advanced Materials Engineering & Technology

The humidity sensing properties of La3+/Ce3+-doped TiO2-20 wt.%SnO2 thin films were ***-gel method was employed to prepare the films on alumina *** constructing a humidity-impedance measuring system,the sensing behaviors were inspected for the films sintered at different *** results showed that,0.5 wt.% of La2O3 or Ce2O3 doped films sintered at 500 °C for 2 h had the best humidity sensing properties,the impedance decreasing from 109 ? to below 104 ? in the humidity ra...

关键词： humidity sensing titania thin film rare earths

humidity sensing properties of Ce-doped nanoporous ZnO thin film prepared by sol-gel method

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Journal of Rare Earths 2012年第1期30卷 38-42页

作者： Mansoor Anbia Seyyed Ebrahim Moosavi Fard Research Laboratory of Nanoporous Materials Faculty of ChemistryIran University of Science and TechnologyFarjam StreetNarmakTehran 16846Iran

The humidity sensitive characteristics of the sensor fabricated from Ce-doped nanoporous ZnO by screen-printing on the alumina substrate with Ag-Pd interdigital electrodes were investigated at different sintering *** nanoporous thin films were prepared by sol-gel *** was found that the impedance of the sensor sintered at 600 oC changed more than four order of magnitude in the relative humidity（RH） range of 11%-95% at 25 *** response and recovery time of the sensor were about 13 and 17 s,*** sensor showed high humidity sensitivity,rapid response and recovery,prominent stability,good repeatability and narrow hysteresis *** re-sults indicated that Ce-doped nanoporous ZnO thin films can be used in fabricating high-performance humidity sensors.

关键词： humidity sensing nanoporous ZnO Ce-doped rare earths

humidity sensing properties of spray deposited Fe doped TiO_(2)thin film

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Journal of Semiconductors 2021年第12期42卷 62-71页

作者： Dipak L Gapale Pranav P.Bardapurkar Sandeep A.Arote Sanjaykumar Dalvi Prashant Baviskar Ratan Y Borse S.N.Arts D.J.M.Commerce and B.N.S.Science College SangamnerDistrict Ahmednagar 422605 MSIndia Thin and Thick film Laboratory Department of ElectronicsM.S.G.CollegeMalegaon Camp(Pin 423105)District NashikMaharashtraIndia

In the present work,ferrite(Fe)doped TiO_(2)thin films with different volume percentage(vol%)were synthesized using a spray pyrolysis *** effect of Fe doping on structural properties such as crystallite size,texture coefficient,microstrain,dislocation densities *** evaluated from the X ray diffratometry(XRD)*** data revealed a polycrystalline anatase TiO_(2)phase for sample synthesized up to 2 vol%and mixed anatase and rutile crystalline phase for sample synthesized at 4 vol%Fe doped TiO_(2).The crystalline size was observed to decrease with increase in Fe dopant vol%and also other structural parameters changes with Fe dopant *** the present work,electrical resistance was observed to decrease with a rise in Fe dopant vol%and temperature of the *** properties like temperature coefficient of resistance and activation energy also showed strong correlation with Fe dopant vol%.humidity sensing properties of the synthesized sample altered with a change in Fe dopant vol%.In the present paper,maximum sensitivity of about 88.7%for the sample synthesized with 2 vol%Fe doped TiO_(2)and also the lowest response and recovery time of about 52 and 3 s were reported for the same sample.

关键词： Fe doped TiO_(2) thin films spray pyrolysis humidity sensing

Supramolecular Film Based on AIEgen: Multiple Configuration Compatibility of humidity sensing

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Supramolecular Film Based on AIEgen: Multiple Configuration ...

Polymer-coated hybrid fiber grating for relative humidity sensing

第一届全国光功能材料青年学者研讨会2018

作者： Yun Yan College of Chemistry and Molecular Engineering Peking University

Aggregation induced emission makes it possible to generate desired emission in solid materials. We show that by fabrication of supramolecular films based on AIEgens bearing coordinating head, flexible luminescent devices can be generated facilely. Upon doping energy acceptors with humidity responsive emission, the supramoelcular film immediately display humidity sensitive fluorescence resonance energy transfer（FRET）,offering a large emission maxima change of over 100 nm upon the stimulus of humidity. In this process, this smart FRET system changes its apparent color under visible light, rendering it a humidity sensing platform with fluorescence and absorbance dual output mode. Especially, the automatic color changing under visible light makes the present film a smart fog-warning material that automatically turns into warning state in foggy ***, the color changing panel is tunable simply by varying the doping ratio of the acceptor. We expect that the AIE based solid material opens up a new vista for the design of smart devices.

关键词： humidity sensing FRET Fog-warning

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Polymer-coated hybrid fiber grating for relative humidity se...

Angle-independent responsive organogel retroreflective structural color film for colorimetric sensing of humidity and organic vapors

2010亚洲光电子会议先进的传感系统及其应用分会场

作者： Tao Li Xinyong Dong Chun-Liu Zhao Yang Liu Institute of Optoelectronic Technology China Jiliang University Hangzhou China 310018

A relative humidity （RH） sensor based on a hybrid fiber grating coated with a moisture sensitive polymer is proposed in this *** hybrid fiber grating includes a normal fiber Bragg grating （FBG） and a tilted FBG （TFBG）,which are superimposed around the same position of the *** FBG reflects a part of the cladding modes of the TFBG and its intensity changes with the refractive index of the moisture sensitive polymer,which varies when absorbing and desorbing *** optical power interrogation method is simper and more cost-efficient than normal FBG-based relative humidity sensors using wavelength detection method.

关键词： Fiber Bragg grating humidity sensing moisture sensitive polymer

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Chinese Chemical Letters 2021年第11期32卷 3584-3590页

作者： Cuiping Ji Jing Zeng Sijia Qin Min Chen Limin Wu Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200433China

The angle dependence of photonic crystals(PCs)dramatically limits their practical applications in the colorimetrical sensing of humidity and volatile organic compound(VOC)*** addition,it is challenging for inverse opal PCs to colorimetrically distinguish between vapors with similar refractive *** from the mechanism of PC-based sensors,here,we report an angle-independent polyacrylamide(PAAm)organogel structural color film based on the mechanisms of retroreflection,total internal reflection(TIR)and interference with a shape similar to a single-sided“egg waffle”.During the process of responding to humidity and VOC vapors,the color of the film remains angle-independent in the normal angle range of 0°to 45°under coaxial illumination and observation *** the same time,the film can colorimetrically distinguish between vapors with similar refractive indices,such as methanol and ethanol,which is mainly due to the differences in their polarity and solubility *** film shows good stability,reversibility and selectivity when exposed to vapors.A colorimetric sensor with a new response mechanism is proposed and has the potential to effectively distinguish between vapors with similar refractive ***,this responsive retroreflective structural color film(RRSCF)provides a universal strategy to develop targeted angle-independent structural color sensors by selecting optimized materials.

关键词： Angle-independent structural color Colorimetric sensing Responsive retroreflective structural color film humidity sensing VOC vapor sensing

Atomically Thin 2D TiO_(2) Nanosheets with Ligand Modified Surface for Ultra-sensitive humidity Sensor

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Chinese Journal of Structural Chemistry 2022年第4期41卷 54-60页

作者： Jianze Xiao Zhihua Fu Guane Wang Xiaoliang Ye Gang Xu College of Chemistry Fuzhou UniversityFuzhou 350116China State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of ScienceFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

As a kind of two-dimensional(2D)nanostructured materials,metal oxide nanosheets(MONS)are attractive and promising humidity sensing materials due to their considerable surface area,good charge carrier transportation,and designable surface functional groups ***,the ultra-thin MONS modified with active functional groups for humidity sensing are still *** a proof of concept,the atomically thin TiO_(2)nanosheets with high surface area and electron-donating amino groups are prepared by a structure-maintained post-ligand modification *** fabricated TiO_(2)-based sensors demonstrate superior humidity sensing performance with high response,short response time,narrow hysteresis,and ultra-low theoretical limit of detection of about 15 ***,the possible mechanism is proposed from the AC complex impedance measurements and DC instantaneous reverse polarity *** work provides a possible path for developing the high-performance 2D nanostructured metal oxides-based humidity materials through the surface chemical method.

关键词： TiO_(2)nanosheet ligand modification ultra-sensitive chemiresistive humidity sensing

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聚苯胺插层水滑石材料的湿敏性质研究

聚苯胺插层水滑石材料的湿敏性质研究