Smell Identification Using a Thick-Film Hybrid Gas Sensor

Kaneyasu, Masayoshi; Ikegami, Akira; Arima, Hideo; Iwanaga, S.

doi:10.1109/tchmt.1987.1134730

Cited by 60 publications

(10 citation statements)

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“…Until now, various gas sensing techniques have been widely used to analyse a number of VOCs, including gas chromatography (GC),20 mass chromatography (MC)21 ion mobility spectrometry (IMS)22 and selected ion flow tube mass spectrometry (SIFT‐MS) 23, 24. However, they are hard to incorporate into portable real‐time gas sensors because of the large size of the equipment, their complexity of operation and high cost 25–32. On the other hand, metal oxide based chemiresistive gas sensors can offer greater usability for portable real‐time breath sensors thanks to their miniaturized size, low cost, easy fabrication and simplicity of operation 33–39.…”

Section: Introductionmentioning

confidence: 99%

Thin‐Wall Assembled SnO₂ Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes

Shin

Choi

Lee

et al. 2012

Adv Funct Materials

348

226

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Hierarchical SnO 2 fi bers assembled from wrinkled thin tubes are synthesized by controlling the microphase separation between tin precursors and polymers, by varying fl ow rates during electrospinning and a subsequent heat treatment. The inner and outer SnO 2 tubes have a number of elongated open pores ranging from 10 nm to 500 nm in length along the fi ber direction, enabling fast transport of gas molecules to the entire thin-walled sensing layers. These features admit exhaled gases such as acetone and toluene, which are markers used for the diagnosis of diabetes and lung cancer. The open tubular structures facilitated the uniform coating of catalytic Pt nanoparticles onto the inner SnO 2 layers. Highly porous SnO 2 fi bers synthesized at a high fl ow rate show fi ve-fold higher acetone responses than densely packed SnO 2 fi bers synthesized at a low fl ow rate. Interestingly, thin-wall assembled SnO 2 fi bers functionalized by Pt particles exhibit a dramatically shortened gas response time compared to that of un-doped SnO 2 fi bers, even at low acetone concentrations. Moreover, Pt-decorated SnO 2 fi bers signifi cantly enhance toluene response. These results demonstrate the novel and practical feasibility of thin-wall assembled metal oxide based breath sensors for the accurate diagnosis of diabetes and potential detection of lung cancer.

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Section: Introductionmentioning

confidence: 99%

Thin‐Wall Assembled SnO₂ Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes

Shin

Choi

Lee

et al. 2012

Adv Funct Materials

348

226

View full text Add to dashboard Cite

show abstract

“…Several disadvantages of today's thick-"lm SnO sensors might be substantially overcome by using modern thin-"lm technologies (To"eld, 1987;Kaneyasu et al, 1987). The construction of thin "lm devices generally relies upon the use of vapour deposition technologies to achieve a very thin "lm of metal-oxide between two electrodes.…”

Section: Solid State Gas Sensorsmentioning

confidence: 99%

PH—Postharvest Technology

Sarig

2000

Journal of Agricultural Engineering Research

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“…First, an array may be formed by an assembly of discrete metal oxide gas sensors having different sensitivities because of different catalysts or because of different op-erating temperatures. Second, integrated arrays fabricated on miniature substrates such as silicon or alumina have been successfully demonstrated at Hitachi, Oak Ridge National Laboratory, and Sandia National Laboratory (Kaneyasu et al 1987;Lauf et al 1987;Hughes et al 1987). The work at ORNL included the creation of several types of multi-sensor arrays.…”

Section: Design and Construction Of Sensor Arraysmentioning

confidence: 99%

“…Clifford's ''chemometric' ' approach requires that the number of different sensors is equal to or greater than the number of possible species to be identified. Other workers (Kaneyasu et al 1987;Stetter et al 1984) have actually built sensor arrays and demonstrated pattern recognition approaches for them that do not seem to have this restriction. Published work to date has demonstrated the approach using the somewhat idealized case of pure compounds.…”

Section: Introductionmentioning

confidence: 99%

Use of Chemical Sensor Arrays for Food and Fragrance Analysis

Hoffheins

Lauf

1990

Journal of Sensory Studies

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ABSTRACT. Many workers have recently developed and demonstrated the use of gas sensor arrays to detect and recognize a variety of compounds. In general, a pattern recognition approach is used in which the signature of an unknown sample is compared to a library of signatures of known substances. All of these efforts have shown varying degrees of success when applied to pure compounds. Unfortunately, flavors and fragrances are never pure compounds. A prototype gas sensor array has been constructed and tested with various mixtures of interest. The results are discussed in terms of their implication to the food and fragrance industry. Early experiments on gasoline‐alcohol mixtures demonstrated that the signatures do not follow a rule of mixing, but were more strongly influenced by the more volatile and/or more reactive component. This led us to examine the behavior of alcohol‐water mixtures for possible quality control in the distilling industry. We discovered that the signature of alcohol dominated even at concentrations as low as ten percent. Preliminary experiments were also performed to see if the prototype sensor array could be used to automatically detect rancidity in dairy products. Flavorings and essential oils are in many cases even more complex mixtures. The behavior of representative classes of these substances were characterized in an attempt to understand their signatures on the basis of their constituents.

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Smell Identification Using a Thick-Film Hybrid Gas Sensor

Cited by 60 publications

References 1 publication

Thin‐Wall Assembled SnO₂ Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes

Thin‐Wall Assembled SnO₂ Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes

PH—Postharvest Technology

Use of Chemical Sensor Arrays for Food and Fragrance Analysis

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Smell Identification Using a Thick-Film Hybrid Gas Sensor

Cited by 60 publications

References 1 publication

Thin‐Wall Assembled SnO2 Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes

Thin‐Wall Assembled SnO2 Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes

PH—Postharvest Technology

Use of Chemical Sensor Arrays for Food and Fragrance Analysis

Contact Info

Product

Resources

About

Thin‐Wall Assembled SnO₂ Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes

Thin‐Wall Assembled SnO₂ Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes