Detecting harmful gases using fluctuation-enhanced sensing with Taguchi sensors

Kish, László B.; Li, Yingfeng; Solis, J. L.; Marlow, W. H.; Vajtai, Róbert; Granqvist, Claes‐Göran; Lantto, V.; Smulko, Janusz; Schmera, Gabor

doi:10.1109/jsen.2005.851018

Cited by 41 publications

(43 citation statements)

References 12 publications

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“…11,12 Moreover, this characterization technique is a promising candidate for selective gas sensing because of specific noise spectrum characteristics in the presence of different gas molecules. [13][14][15] Low-frequency conductance fluctuations of metal oxide nanowire transistors have been studied for the case of SnO 2 nanowires 16 and ZnO nanowires. 17,18 However, metal oxide nanowire devices under gas sensor operation conditions have received little attention so far.…”

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confidence: 99%

Low-frequency noise characterization of single CuO nanowire gas sensor devices

Steinhauer

Köck

Gspan

et al. 2015

Applied Physics Letters

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Low-frequency noise properties of single CuO nanowire devices were investigated under gas sensor operation conditions in dry and humid synthetic air at 350 °C. A 1/f noise spectrum was found with the normalized power spectral density of current fluctuations typically a factor of 2 higher for humid compared to dry atmosphere. A core-shell nanowire model is proposed to treat the noise as parallel combination of gas-independent bulk and gas-dependent surface noise components. The observed increase in 1/f noise in the presence of water vapor is explained in terms of Hooge's mobility fluctuation model, where the increased surface noise component is attributed to carrier scattering at potential fluctuations due to hydroxyl groups at the nanowire surface.

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mentioning

confidence: 99%

Low-frequency noise characterization of single CuO nanowire gas sensor devices

Steinhauer

Köck

Gspan

et al. 2015

Applied Physics Letters

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“…Exposure of a sensor to targeted substances causes appearing additional external noise sources, which come from the chemical environment, and are supposed to have a similar feature as in conductometric sensors published in the literature [20]: (i) the adsorption-desorption process of gas molecules on the active layer, (ii) diffusion of the adsorbed molecules or molecule fragments on the sensor surface. The measured spectral density of current or voltage fluctuations is assumed to result from the superposition of contributions of these two noise sources as well as the inherent noise sources.…”

Section: Noise In Electrochemical Sensorsmentioning

confidence: 99%

“…An increased level of noise or unusual shape of the noise spectra usually indicate failure mechanisms in particular devices [14][15][16][17][18]. Several authors showed that fluctuation analysis enables to extract a more selective response from the chemical sensors, [19][20][21][22][23][24], surface acoustic wave sensors, and resonant sensors [25,26].…”

Section: Introductionmentioning

confidence: 99%

Current Fluctuation Measurements of Amperometric Gas Sensors Constructed with Three Different Technology Procedures

Sedlák

Kuberský

Škarvada

et al. 2016

Metrology and Measurement Systems

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Electrochemical amperometric gas sensors represent a well-established and versatile type of devices with unique features: good sensitivity and stability, short response/recovery times, and low power consumption. These sensors operate at room temperature, and therefore have been applied in monitoring air pollutants and detection of toxic and hazardous gases in a number of areas . Some drawbacks of classical electrochemical sensors are overcome by the solid polymer electrolyte (SPE) based on ionic liquids. This work presents evaluation of an SPE-based amperometric sensor from the point of view of current fluctuations. The sensor is based on a novel three-electrode sensor platform with solid polymer electrolytes containing ionic liquid for detection of nitrogen dioxide − a highly toxic gas that is harmful to the environment and presenting a possible threat to human health even at low concentrations. The paper focuses on using noise measurement (electric current fluctuation measurement) for evaluation of electrochemical sensors which were constructed by different fabrication processes: (i) lift-off and drop-casting technology, (ii) screen printing technology on a ceramic substrate and (iii) screen printing on a flexible substrate.

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“…Schmera and coworkers analyzed the situation of Surface Acoustic Wave (SAW) sensors and predicted the FES spectrum for SAW and MOS sensors with surface diffusion [10][11]. Commercial-On-The-Shelf (COTS) sensors with environmental pollutants and gas combinations were also studied [12,16,17]. In nanoparticle sensors with a temperature gradient, the possibility of using the noise of the thermoelectric voltage for FES was demonstrated [15].…”

Section: Fluctuation-enhanced Sensing Of Gaseous Chemical Agentsmentioning

confidence: 99%

Novel Applications of Noise in Sensing and Communications

Kish¹,

Mingesz²,

Gingl³

et al. 2007

AIP Conference Proceedings

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Recently, it has been shown that excess noises generated or modified by chemical agents can be used to detect and identify chemicals with enhanced sensitivity and selectivity. Moreover thermal noise and its artificial versions (Johnson-like noises) can be utilized as information carriers with peculiar properties. The first application is called FluctuationEnhanced Sensing. The second class can be called Thermal Noise Informatics with relevant topics are Zero Power Classical Communication and (in the quantum limit) Zero-Quantum Quantum Communication; Thermal Noise Driven Computing; and Totally Secure Classical Communication. In the paper version of this talk, we will briefly describe the scope of these fields and in the oral talk we also provide extended considerations and results.

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Detecting harmful gases using fluctuation-enhanced sensing with Taguchi sensors

Cited by 41 publications

References 12 publications

Low-frequency noise characterization of single CuO nanowire gas sensor devices

Low-frequency noise characterization of single CuO nanowire gas sensor devices

Current Fluctuation Measurements of Amperometric Gas Sensors Constructed with Three Different Technology Procedures

Novel Applications of Noise in Sensing and Communications

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