High sensitivity ethanol gas sensor integrated with a solid-state heater and thermal isolation improvement structure for legal drink-drive limit detecting

Ho, Jyh-Jier; Fang, Yean Kuen; Wu, Kuen-Hsien; Hsieh, Wen-Tse; Chen, C.H; Chen, G.S; Ju, Ming‐Shaung; Lin, Jing‐Jenn; Hwang, Seok-Ho

doi:10.1016/s0925-4005(98)00240-8

Cited by 72 publications

(28 citation statements)

References 7 publications

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“…A strong focus has been put on the detection of trace amounts of (gaseous) ethanol, for instance to improve breathalyzer tests. 102 In this regard, ZnO nanowires have long been used for ethanol detection as they exhibit a high sensitivity at elevated temperatures. 103 In ambient air, oxygen molecules are caught on the fibers, forming oxygen ions which significantly increases the resistance of the fibers.…”

Section: Protein-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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Section: Protein-responsive Electrospun Fibersmentioning

confidence: 99%

Stimuli-responsive electrospun fibers and their applications

et al. 2011

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“…[7] Modern alcohol breath analyzers based on ethanol sensors are replacing traditional methods for the identification of drunken drivers. [8] Furthermore, recent success in non-invasive medical diagnostics based on human breath analysis is pushing the development of extremely sensitive gas sensors cable of sub-ppm detection of specific analytes (e.g. acetone) in a complex gas mixture.…”

Section: Introductionmentioning

confidence: 99%

Semiconductor Gas Sensors: Dry Synthesis and Application

2010

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Since the development of the first chemoresistive metal oxide based gas sensors, transducers with innovative properties have been prepared by a variety of wet- and dry-deposition methods. Among these, direct assembly of nanostructured films from the gas phase promises simple fabrication and control and with the appropriate synthesis and deposition methods nm to μm thick films, can be prepared. Dense structures are achieved by tuning chemical or vapor deposition methods whereas particulate films are obtained by deposition of airborne, mono- or polydisperse, aggregated or agglomerated nanoparticles. Innovative materials in non-equilibrium or sub-stoichiometric states are captured by rapid cooling during their synthesis. This Review presents some of the most common chemical and vapor-deposition methods for the synthesis of semiconductor metal oxide based detectors for chemical gas sensors. In addition, the synthesis of highly porous films by novel aerosol methods is discussed. A direct comparison of structural and chemical properties with sensing performance is given.

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“…In regards to the sensor applications, ZnO has been extensively applied for gas sensing thanks to the ease in adjusting its resistance by the type of adsorbed gas species on its surface. Ethanol detection is one of the highest challenges for traffic safety for which improvement automotive industries invest greatly and numerous attempts were made to fabricate highly sensitive, reliable and cheap sensors [3,4]. However, ethanol sensing application of ZnO is limited by several issues like high operating temperature, poor selectivity, and relatively low response.…”

Section: Introductionmentioning

confidence: 99%

Effect of grain-size on the ethanol vapor sensing properties of room-temperature sputtered ZnO thin films

et al. 2015

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We have investigated the gas sensing properties of ZnO thin films (100 to 200 nm thickness) deposited by roomtemperature radio frequency magnetron sputtering. The sensitivity of the films to ethanol vapor was measured in the 10 to 50 ppm concentration range at operating temperatures between 200 and 400°C. A synergetic effect of decreasing grain size and increasing operating temperature was observed towards the improvement of the sensitivity, reaching a value of 54 and a limit of detection as low as 0.61 ppm. The decrease in the grain size resulted in prolonged response time but faster recovery. In any case, both response time and recovery time are < 400 s. The results demonstrate that room-temperature magnetron sputtering is a viable approach to enhance the performances of ZnO films in sensors for ethanol vapor.

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High sensitivity ethanol gas sensor integrated with a solid-state heater and thermal isolation improvement structure for legal drink-drive limit detecting

Cited by 72 publications

References 7 publications

Stimuli-responsive electrospun fibers and their applications

Stimuli-responsive electrospun fibers and their applications

Semiconductor Gas Sensors: Dry Synthesis and Application

Effect of grain-size on the ethanol vapor sensing properties of room-temperature sputtered ZnO thin films

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