Thin-film SnO2 sensor arrays controlled by variation of contact potential—a suitable tool for chemometric gas mixture analysis in the TLV range

Hoefer, Ulrich; Böttner, H.; Felske, A.; Kühner, Gerd; Steiner, Klaus; Sulz, Gerd

doi:10.1016/s0925-4005(97)00230-x

Cited by 35 publications

(15 citation statements)

References 12 publications

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“…26,27 used an array of electrodes of differing width and separation to examine contact resistance effects in tin dioxide sensors. The transmission-line method they used involves measuring the total resistance of a semiconductor sample as a function of electrode separation.…”

Section: Electrode Geometrymentioning

confidence: 99%

Electrode materials and electrode-oxide interfaces in semiconductor gas sensors

Lee

2013

Semiconductor Gas Sensors

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Section: Electrode Geometrymentioning

confidence: 99%

Electrode materials and electrode-oxide interfaces in semiconductor gas sensors

Lee

2013

Semiconductor Gas Sensors

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“…Over the past few decades, solid-state gas sensors based on SnO 2 have become the predominant solid-state devices for gas alarms used in domestic, commercial and industrial premises [2,3]. Even sensor arrays have been fabricated using exclusively inorganic materials of the same nature [4]. The detailed analysis of the extensive literature is out of scope here, although we give some new references [2][3][4][5][6].…”

Section: Thin Polycrystalline Sno 2 Film Gas Sensorsmentioning

confidence: 99%

“…Gas sensitivity behaviour of thin-and thickfilm SnO 2 resistors have been studied for many years and are well known from the literature [2][3][4][5][6][7][8][9]. In general, the prepared samples also followed this behaviour:…”

Section: Testing Gas Sensitive Resistorsmentioning

confidence: 99%

Combining inorganic and organic gas sensors elements: a new approach for multi‐component sensing

et al. 1999

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Atmospheric dependent, gas sensitive resistors seem to be good candidates for detecting critical air pollution levels. Recently, great progress has been made in the development of various sensor types, but less attention seems to be paid to the integration of sensor elements with different characteristics. The aim of this international project is to develop a smart hybrid gas multisensor module for environmental applications, i.e. by combining classical thick-and thin-film elements with polymer-film based sensors and also a signal processing ASIC within a single package, which should be useful for all sensor types. The module should enable multi-sensor operation as well, when connected to an intelligent signal-processing unit.

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“…Chemical Vapor Deposition has been used for many years as a suitable option for the growth of polycrystalline graphene, with a highly reproducible process and sufficient quality for most requirements [4,5]. CVD-grown graphene natural defects are also somewhat desired, as defects and irregularities are well-known adsorption sites in most solid state gas sensors in use today [6,7].…”

Section: Introductionmentioning

confidence: 99%

Plasma-Treated CVD Graphene Gas Sensor Performance in Environmental Condition: The Role of Defects on Sensitivity

Mastrapa

Freire

2019

Journal of Sensors

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In this work, a low-cost resistive gas sensor based on graphene grown by CVD was fabricated and its sensitivity was studied in terms of defect density. CVD graphene was transferred using Polyurethane as sacrifice layer with low contamination and defect-free results. An atmospheric plasma etching system was used to homogeneously induce defects on the sensor’s active area, as investigated through Raman spectroscopy. Device sensing properties were significantly enhanced for greater defect density for both NH3 and NO2. The modified sensors were submitted to different concentrations of both target gas to assess detection limits and overall behavior. It was revealed that defective CVD graphene devices possess sensitivity up to ppm range with linear dependence in the range of values measured. The fabricated sensors presented little to no signal degradation after months of atmospheric exposure.

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Thin-film SnO2 sensor arrays controlled by variation of contact potential—a suitable tool for chemometric gas mixture analysis in the TLV range

Cited by 35 publications

References 12 publications

Electrode materials and electrode-oxide interfaces in semiconductor gas sensors

Electrode materials and electrode-oxide interfaces in semiconductor gas sensors

Combining inorganic and organic gas sensors elements: a new approach for multi‐component sensing

Plasma-Treated CVD Graphene Gas Sensor Performance in Environmental Condition: The Role of Defects on Sensitivity

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