Electrochemical gas sensor using a novel gas permeable electrode modified by ion implantation

Okamura, Kei; Ishiji, Toru; Iwaki, Masaya; Suzuki, Yoshiaki; Takahashi, K.

doi:10.1016/j.surfcoat.2006.02.065

Cited by 33 publications

(16 citation statements)

References 4 publications

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“…[5][6][7][8][9][10][11] Several amperometric sensors were proposed for VOC monitoring, in that they make possible to perform multicomponent analyses with wide linearity ranges and good selectivity, which can be suitably tuned resorting to convenient modifications of electrode surfaces. Thus, sensors designed to generate current responses and exploiting both gas permeable membranes 12,13 and membrane-free devices were developed, these last based on either solid polymer electrolytes (SPEs) [14][15][16] or room temperature ionic liquids (RTILs). [17][18][19][20][21][22][23] Unfortunately, these sensors provides responses for specific classes of VOCs alone, while flavors come out almost always from the contribution of different volatile species.…”

Section: ■ Introductionmentioning

confidence: 99%

Room Temperature Ionic Liquids As Useful Overlayers for Estimating Food Quality from Their Odor Analysis by Quartz Crystal Microbalance Measurements

et al. 2013

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An array of quartz crystals coated with different room-temperature ionic liquids (RTILs) is proposed for the analysis of flavors by quartz crystal microbalance (QCM) measurements. Seven RTILs were adopted as sensing layers, all containing imidazolium or phosphonium cations, differing from one another in the length and branching of alkyl groups and neutralized by different anions. The array was at first applied to the analysis of 31 volatile organic compounds (VOCs), such as alcohols, phenols, aldehydes, esters, ketones, acids, amines, hydrocarbons and terpenes, chosen as representative components of a wide variety of food flavors. Multivariate data analysis by the principal component analysis (PCA) approach of the set of the corresponding responses led to separated clusters for these different chemical categories. To further prove the good performance of the RTIL-coated quartz crystal array as an "electronic nose", it was applied to the analysis of headspaces from cinnamon samples belonging to different botanical varieties (Cinnamon zeylanicum and Cinnamon cassia). PCA applied to responses recorded on different stocks of samples of both varieties showed that they could be fully discriminated.

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Section: ■ Introductionmentioning

confidence: 99%

Room Temperature Ionic Liquids As Useful Overlayers for Estimating Food Quality from Their Odor Analysis by Quartz Crystal Microbalance Measurements

et al. 2013

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“…The structure of the interface is complex, so that the effect of ion irradiation on the sensitivity is not so simple. Additionally, chemical composition changes induced by ion irradiation has been studied, however, the relations between the composition change and the sensitivity change of sensors have not been realized [12].…”

Section: Effects Of Ion Irradiation On Chlorine Sensingmentioning

confidence: 99%

“…In the case of Au coated electrode reported in the papers [12,13], it has been shown that the enhancement of sensitivities by ion irradiations, I g /I 0, (where I g and I 0 are the characteristic currents of the ion-irradiated sensor and control, respectively), was remarkably depends on the sort of sensing gases. The normalized current for H 2 gas is several orders smaller than that for SO 2 and NO 2 , however, larger ion irradiation effect (I g /I 0 =20 for H 2 ) appeared in comparison with I g /I 0 of SO 2 and NO 2 .…”

Section: Reaction Mechanismmentioning

confidence: 99%

“…We have already reported enhancement of sensitivity and selectivity of sensors for detection of hydrogen and carbon monoxide by using ion irradiated membrane electrodes [12,13].…”

mentioning

confidence: 99%

“…The ion irradiation of Ne + at an acceleration energy of 150 keV was chosen for the modification of the membrane, because Ne + irradiation was proved as an effective method to improve the sensor characteristics [12] . The silver (Ag) electrode is necessary to make COCl 2 2 to prevent increase of the target temperature and the gas pressure in the target chamber [8,9].…”

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confidence: 99%

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Improvement of characteristics of amperometric Cl<sub>2</sub> and COCl<sub>2</sub> gas sensors by ion irradiation into the gas permeable membranes

Imaya

Okamura

Nakano

et al. 2011

Trans. Mat. Res. Soc. Japan

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Electrochemical sensors based on electrolysis of chlorine (Cl 2 ) and phosgene (COCl 2 ) gas have been developed by using gas permeable membrane modified by ion irradiation technique. An expanded polytetrafluoroethylene (ePTFE) membrane is a chemically stable substance and has high permeability of gases without permeation of electrolytic solutions. In this study, gas permeable membrane of ePTFE has been made of ion irradiation of Ne + with a fluence of 1 × 10 15 ions/cm 2 . After ion-irradiation into ePTFE, Ag was coated by a vacuum evaporation method, which was used as a working electrode to construct the electrochemical gas sensors for Cl 2 and COCl 2 . The sensitivity for Cl 2 and COCl 2 of the sensors used the ion-irradiated ePTFE membrane showed significant enhancement, which was more than 3.8 and 1.3 times higher than that of non ion-irradiated one. Morphology change of ePTFE by ion irradiation was observed by scanning electron microscopy. The enhancement of the sensitivity by the ion irradiation is due to changing of active nature of the Ag electrode and increase of the effective surface area.

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A Novel Process for the Fabrication of a Silver‐Nanoparticle‐Modified Electrode and Its Application in Nonenzymatic Glucose Sensing

et al. 2012

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In this work, we present a novel process for fabrication of a silver‐nanoparticle‐modified electrode using silver ion implantation. This method is facile, low‐cost and environmental friendly without the use of any other chemicals. The obtained AgNPs on the electrode surface, which were free from any reagents surrounding or binding to them, showed prominent electrocatalytic activity towards the oxidation of glucose, leading to a nonenzymatic glucose sensor with a wide linear range and a detection limit of 0.5 µM. In addition, the modified electrode also exhibited acceptable reproducibility and long‐term stability.

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Electrochemical gas sensor using a novel gas permeable electrode modified by ion implantation

Cited by 33 publications

References 4 publications

Room Temperature Ionic Liquids As Useful Overlayers for Estimating Food Quality from Their Odor Analysis by Quartz Crystal Microbalance Measurements

Room Temperature Ionic Liquids As Useful Overlayers for Estimating Food Quality from Their Odor Analysis by Quartz Crystal Microbalance Measurements

Improvement of characteristics of amperometric Cl<sub>2</sub> and COCl<sub>2</sub> gas sensors by ion irradiation into the gas permeable membranes

A Novel Process for the Fabrication of a Silver‐Nanoparticle‐Modified Electrode and Its Application in Nonenzymatic Glucose Sensing

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