Gas and vapour effects on the resistance fluctuation spectra of conducting polymer thin-film resistors

Bruschi, P.; Cacialli, Franco; Nannini, Andrea; Neri, Bruno

doi:10.1016/0925-4005(93)01021-u

Cited by 40 publications

(29 citation statements)

References 10 publications

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“…The name "Fluctuation-Enhanced Sensing" was created by John Audia (SPAWAR, US Navy) in 2001. ROC Using electrical noise (spontaneous fluctuations) to identify chemicals was first proposed by Neri and coworkers [1,2] in 1994-95 by showing the sensitivity of conductance noise spectra of conducting polymers as a function of the ambient gas composition. In 1997, Gottwald and coworkers [3] published similar effects for the conductance noise spectrum of semiconductor resistors with non-passivated surfaces.…”

Section: Fluctuation-enhanced Sensing Of Gaseous Chemical Agentsmentioning

confidence: 99%

“…To generate a separate pattern corresponding to different chemical compositions, a number (6 to 40) of different types of sensors are needed, which makes the system expensive and unreliable for practical applications. On the other hand Fluctuation-Enhanced Sensing (FES) (see Figures 1,2) is able to generate a complex pattern by the application of a single sensor [1][2][3][4][5][6][7][8][9].…”

Section: Fluctuation-enhanced Sensing Of Gaseous Chemical Agentsmentioning

confidence: 99%

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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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Section: Fluctuation-enhanced Sensing Of Gaseous Chemical Agentsmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…Resistance (conductance) fluctuations occur in most conducting media and they usually show spectra in the low-frequency limit [8]- [12]. This is the situation even in conducting polymers where the noise is related to chemical information [11], 1530-437X/$20.00 © 2005 IEEE [12]. This paper reports a systematic study for selecting commercial Taguchi type sensors for fluctuation-enhanced chemical sensing.…”

Section: Introductionmentioning

confidence: 98%

Fluctuation-enhanced multiple-gas sensing by commercial Taguchi sensors

Solis

Seeton

et al. 2005

IEEE Sensors J.

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This study is carried out to investigate and demonstrate the possibility of practical applications of commercial Taguchi gas sensors for fluctuation-enhanced chemical sensing of multiple gases. The stochastic resistance fluctuations of the sensors were studied during the burning-in process and during exposure to different gases at different temperatures. The analysis of resistance fluctuations in the gas sensors during and after exposure to gases indicates a strongly enhanced sensitivity and selectivity.

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“…The dynamic counterpart of this method i.e., the temperature modulation technique, whereby the sensor temperature is modulated, can also be applied [3]. Fluctuation enhanced sensing (FES) is a novel method, where the noise spectrum (more closely power spectral density, (PDS)) of the fluctuations of the sensor resistance (conductance) carries the chemical information [4,5]. It was shown to be sensitive for odors [6] and the method can even be more sensitive, as the amplitude of the PSD serves as sensor signal, as compared to the mean resistance change [7] of the Taguchi sensors.…”

Section: Introductionmentioning

confidence: 99%

Drift effect of fluctuation enhanced gas sensing on carbon nanotube sensors

Heszler

Gingl

Mingesz

et al. 2008

Physica Status Solidi (b)

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A low‐noise electronic system is built and tested for fluctuation enhanced sensing. This latter is a new technique and based on the determination of the power spectral density of the stationary resistance fluctuations of semiconductor gas sensors. Its use is advantageous for improving the chemical selectivity of sensors. However, subsequent to an initial fast change of the sensor mean resistance, as a sensor is exposed to an analyte gas, a typical drift of the resistance can be observed. This effect hinders evolving stacionary conditions and thus acquiring fast measurements when applying fluctuation enhanced sensing. Therefore, this drift effect is studied both experimentally and theoretically. Functionalized carbon nanotube layers on silicon chips serve as active material for the experimental investigations. Power spectral density functions are measured and simulated numerically with and without drift conditions. The results are compared and the effect of resistive drift on fluctuation enhanced sensing is discussed. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Gas and vapour effects on the resistance fluctuation spectra of conducting polymer thin-film resistors

Cited by 40 publications

References 10 publications

Novel Applications of Noise in Sensing and Communications

Novel Applications of Noise in Sensing and Communications

Fluctuation-enhanced multiple-gas sensing by commercial Taguchi sensors

Drift effect of fluctuation enhanced gas sensing on carbon nanotube sensors

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