Highly Sensitive and Stable Humidity Nanosensors Based on LiCl Doped TiO<sub>2</sub> Electrospun Nanofibers

Li, Zhenyu; Zhang, Hongnan; Zheng, Weitao; Wang, Wei; Hu, Haitao; Wang, Ce; MacDiarmid, Alan G.; Wei, Yen

doi:10.1021/ja800176s

Cited by 417 publications

(240 citation statements)

References 36 publications

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“…24 The electrospinning deposition step which leads to 1D nanofibers was substituted with spin coating of the working solution and subsequent annealing as described above, which led to the formation of the 2D morphology described in this work.…”

Section: ' Results and Discussionmentioning

confidence: 99%

“…A working solution was prepared using the following procedure: 1.5 g of tetrabutyl titanate was mixed with 3 mL of acetic acid and 3 mL of ethanol with continuous stirring. 24 The obtained solution was added to 7.5 mL of ethanol containing 0.45 g of poly(vinylpyrrolidone) (PVP) and 0.20 g of LiCl, followed by stirring for 30 min at room temperature. The resulting solution was spincoated onto glass slides with gold electrodes at a spinning rate of 7000 rpm using an EC101D Photo-resist Spinner Controller (Headway Research Inc.) followed by annealing in a furnace (Lindberg, 58000 series) with a UP150 controller at 520°C for 3 h in order to remove organic components (substrates were placed in a nonsealed quartz tube).…”

Section: ' Introductionmentioning

confidence: 99%

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TiO₂/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications

Buvailo

Xing

Hines

et al. 2011

ACS Appl. Mater. Interfaces

109

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A simple and straightforward method of depositing nanostructured thin films, based on LiCl-doped TiO 2 , on glass and LiNbO 3 sensor substrates is demonstrated. A spin-coating technique is employed to transfer a polymer-assisted precursor solution onto substrate surfaces, followed by annealing at 520°C to remove organic components and drive nanostructure formation. The sensor material obtained consists of coin-shaped nanoparticles several hundred nanometers in diameter and less than 50 nm thick. The average thickness of the film was estimated by atomic force microscopy (AFM) to be 140 nm. Humidity sensing properties of the nanostructured material and sensor response times were studied using conductometric and surface acoustic wave (SAW) sensor techniques, revealing reversible signals with good reproducibility and fast response times of about 0.75 s. The applicability of this nanostructured film for construction of rapid humidity sensors was demonstrated. Compared with known complex and expensive methods of synthesizing sophisticated nanostructures for sensor applications, such as physical vapor deposition (PVD) and chemical vapor deposition (CVD), this work presents a relatively simple and inexpensive technique to produce SAW humidity sensor devices with competitive performance characteristics.

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Section: ' Results and Discussionmentioning

confidence: 99%

Section: ' Introductionmentioning

confidence: 99%

TiO₂/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications

Buvailo

Xing

Hines

et al. 2011

ACS Appl. Mater. Interfaces

109

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“…The high sensitivity and fast response rates of electrospun fibers were further exploited by Li and colleagues, 78 who developed lithium chloride (LiCl) doped titanium dioxide (TiO 2 ) nanofibers by electrospinning and calcination. This novel type of humidity sensor displayed impedance changes from 10 7 to 10 4 O when humidity levels in air increased from 11 to 95%, indicating a highly sensitive device.…”

Section: Photo/optical-responsive Electrospun Fibersmentioning

confidence: 99%

Stimuli-responsive electrospun fibers and their applications

et al. 2011

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In this critical review, an overview is given on recent advances in the development and application of stimuliresponsive electrospun nanofibers.Please check this proof carefully. Our staff will not read it in detail after you have returned it. Translation errors between word-processor files and typesetting systems can occur so the whole proof needs to be read. Please pay particular attention to: tabulated material; equations; numerical data; figures and graphics; and references. If you have not already indicated the corresponding author(s) please mark their name(s) with an asterisk. Please e-mail a list of corrections or the PDF with electronic notes attached --do not change the text within the PDF file or send a revised manuscript.Please bear in mind that minor layout improvements, e.g. in line breaking, table widths and graphic placement, are routinely applied to the final version.Please note that, in the typefaces we use, an italic vee looks like this: n, and a Greek nu looks like this: n.We will publish articles on the web as soon as possible after receiving your corrections; no late corrections will be made.Please return your final corrections, where possible within 48 hours of receipt, by e-mail to: chemsocrev@rsc.org Reprints-Electronic (PDF) reprints will be provided free of charge to the corresponding author. Enquiries about purchasing paper reprints should be addressed via: http://www.rsc.org/publishing/journals/guidelines/paperreprints/. Costs for reprints are below: Stimuli-responsive electrospun nanofibers are gaining considerable attention as highly versatile tools which offer great potential in the biomedical field. In this critical review, an overview is given on recent advances made in the development and application of stimuli-responsive fibers. The specific features of these electrospun fibers are highlighted and discussed in view of the properties required for the diverse applications. Furthermore, several novel biomedical applications are discussed and the respective advantages and shortcomings inherent to stimuli-responsive electrospun fibers are addressed (136 references).

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“…This fast response of the ZNF with Au electrode for both adsorption and desorption is believed to be due to the high surface to volume ratio of the one-dimensional nanodetector. 38,39 The physisorption and chemisorption of water molecule on ZnO nanofibers surface are shown in figure 9. Table IV shows the comparison of the performance of our nanofibers with a few recently reported metal oxide RH sensors.…”

Section: Modulusmentioning

confidence: 99%

Effect of different electrodes on the transport properties of ZnO nanofibers under humid environment

et al. 2015

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Relative humidity (RH) sensing properties of zinc oxide nanofibers (ZNF), synthesized using electrospinning technique, were studied by impedance spectroscopy. RH sensors were fabricated with two different electrodes (Au and Ni) using lithography on top of the nanofibers deposited on Si/SiO2 substrate. Compare with the Ni electrode sensor, Au electrode sensor exhibits larger sensitivity and quicker response/recovery. Capacitance, electrical conductivity and electrical modulus were studied at 40%-90% RH as a function of the frequency of the applied AC signal in the frequency range of 10−2-106 Hz. The corresponding response and recovery times are 3s and 5s for Au, and 6s and 10s for Ni electrode sensor, respectively. The sensors exhibited a reversible response with small hysteresis of less than 4% and 12% for Au and Ni electrodes respectively. Stability of the sensor device with Au electrode was confirmed by testing the device for 13 days. The excellent sensing characteristics and comparison of sensors with different electrode materials may offer an effective route for designing and optimizing RH sensors.

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Highly Sensitive and Stable Humidity Nanosensors Based on LiCl Doped TiO₂ Electrospun Nanofibers

Cited by 417 publications

References 36 publications

TiO₂/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications

TiO₂/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications

Stimuli-responsive electrospun fibers and their applications

Effect of different electrodes on the transport properties of ZnO nanofibers under humid environment

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Highly Sensitive and Stable Humidity Nanosensors Based on LiCl Doped TiO2 Electrospun Nanofibers

Cited by 417 publications

References 36 publications

TiO2/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications

TiO2/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications

Stimuli-responsive electrospun fibers and their applications

Effect of different electrodes on the transport properties of ZnO nanofibers under humid environment

Contact Info

Product

Resources

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Highly Sensitive and Stable Humidity Nanosensors Based on LiCl Doped TiO₂ Electrospun Nanofibers

TiO₂/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications

TiO₂/LiCl-Based Nanostructured Thin Film for Humidity Sensor Applications