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Review | 15-February-2020

New approaches for improving selectivity and sensitivity of resistive gas sensors: A review

Resistive gas sensors are very popular and reliable but suffer from low selectivity and sensitivity. Various methods have been suggested to improve both features without increasing the number of sensors in gas detection systems. Fluctuation enhanced gas sensing was proposed to improve gas detection efficiency by analyzing low-frequency resistance fluctuations, and noise parameters can be more informative than the single DC resistance and can advance gas detection systems by improving detection

Janusz Smulko, Maciej Trawka, Radu Ionescu, Fatima E. Annanouch, Eduard Llobe, Claes G. Granqvist, Laszlo B. Kish

International Journal on Smart Sensing and Intelligent Systems, Volume 7 , ISSUE 5, 1–6

Research Article | 27-December-2017

Pure and Cupricated BaSnO3 thick film resistor: Synthesis, Characterization and studies on its gas sensing performance

, ethanol, and H2S. The pure BS film shows good response multiple gases at various operating temperature up to 5000C as NH3, CO2, CO, ethanol and, H2S for different gas concentrations, when the pure film is surface modified with aqueous solution of Cucl2 using simple dipping technique for various time intervals (5 min., 10 min., 20 min. and, 30 min.), film improves the selectivity and sensitivity. Maximum response (S=36.2) was found to H2S gas at temperature of 250 0C and S=12.1 for ethanol at 500 oC

N.U. PATIL, V.B. GAIKWAD, P.D. HIRE, R.M. CHAUDHARI, M. K. DEORE, G. H. JAIN

International Journal on Smart Sensing and Intelligent Systems, Volume 6 , ISSUE 1, 433–447

Article | 01-December-2016

SELECTIVE CO SENSING USING NANOSTRUCTURED TiO_2 GAS SENSORS: A REVIEW

Fabricating a sensor for a toxic gas like carbon monoxide has been a constant need in many domestic and industrial applications. Although many sensors are commercially available, research is focused on developing a selective sensor with higher sensitivity, selectivity and low operating temperature. This paper reviews the fabrication, comparison and evaluation of different nanostructured titanium dioxide sensors used in detection. After a brief description of the structural properties of , the

Roshan Castelino, Pramod N G

International Journal on Smart Sensing and Intelligent Systems, Volume 9 , ISSUE 4, 2237–2256

Research Article | 13-December-2017

CO2 sensing characteristics of Sm1-xBaxCoO3 (x = 0, 0.1, 0.15, 0.2) nanostructured thick film

G.N. Chaudhari, P.R. Padole, S.V. Jagatap, M.J. Pawar

International Journal on Smart Sensing and Intelligent Systems, Volume 1 , ISSUE 3, 613–622

Research paper | 13-December-2017

NANOSENSORS ENGINEERING:II. SUPERFICIAL FUNCTIONALIZATION OF SnO2 NANOWIRE FOR SENSING PERFORMANCE IMPROVEMENT

Paper presents results of study aimed the tin dioxide nanowire gas sensing performance improvement via in situ functionalization with NiO. Developed nanostructures have demonstrated improved by order gas sensitivity toward H2 and CO and drastic increase of selectivity to H2 against CO. Obtained results are discussed from the point of view of NiO/SnO2 heterojunction formation and its influence on electrical transport through nanowire and nanowire interaction with target gases.

Serghei Dmitriev

International Journal on Smart Sensing and Intelligent Systems, Volume 3 , ISSUE 4, 807–819

Article | 01-September-2012

PREPARATION AND CHARACTERIZATION OF ZIRCONIA BASED THICK FILM RESISTOR AS A AMMONIA GAS SENSOR

voltages and at different working temperature. X-Ray Diffraction studies confirmed that the combinations of tetragonal and monoclinic structure. The energy band gap and the thicknesses of the films were evaluated, the crystalline grain size was determined using Scherrer’s formula. The gas sensing performances of various gases were tested with working temperatures from 100oto500oc. The sensitivity and selectivity to different gases was tested and the resistive thick films showed highest

S. B. Deshmukh, R. H. Bari, G. E. Patil, D. D. Kajale, G. H. Jain, L. A. Patil

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 3, 540–558

Research Article | 15-February-2020

Zirconia potentiometric oxygen sensor activation using NEMCA

NEMCA known for the increasing the catalytic activity/selectivity of the gas exposed electrodes was investigated for the potentiometric zirconia oxygen sensor activation. Electrochemical promotion of O2-sensors with Pt-cermet electrodes aged in the field was significant with up to 5 times in the impedance reduction. Stability test on the NEMCA activated O2-sensors was showing just a minor impedance increase. Sensor response time was reduced by NEMCA effect by ~5-10% with up to 3 times signal

Pavel Shuk, Robert Jantzt

International Journal on Smart Sensing and Intelligent Systems, Volume 7 , ISSUE 5, 1–4

Original Paper | 15-February-2020

Fluctuation enhanced gas sensing using UV irradiated Au-nanoparticle-decorated WO3-nanowire films

WO3 nanowires (WO3-NWs) decorated with gold nanoparticles (AuNPs) were utilized in resistive gas sensor devices to detect ethanol by use of fluctuation enhanced sensing (FES).  The experimental system records both DC resistance and fluctuations of the sensing film. Our data verify that the sensitivity and selectivity of the gas sensor are improved by applying FES when the sensor is stimulated with a combination of UV light and heating. We conclude that UV light can produce improved gas

Maciej Trawka, Janusz Smulko, Lech Hasse, Radu Ionescu, Fatima E. Annanouch, Eduard Llobet, Claes G. Granqvist, Laszlo B. Kish

International Journal on Smart Sensing and Intelligent Systems, Volume 7 , ISSUE 5, 1–5

research-article | 08-April-2020

APPLICATION OF POTASSIUM FERRATE(VI) IN THE TREATMENT OF SELECTED WATER AND WASTEWATER POLLUTANTS – SHORT REVIEW

Simona KLIŚ, Krzysztof BARBUSIŃSKI, Maciej THOMAS, Anna MOCHNACKA

Architecture, Civil Engineering, Environment, Volume 13 , ISSUE 1, 129–138

Original Paper | 24-February-2017

Inability of shear-wave elastography to distinguish malignant from benign prostate tissue – a comparison of biopsy, whole-mount sectioning and shear-wave elastography

-wave elastography were compared with biopsy and histological results. Results: The comparison between the results of shear-wave elastography and those of biopsy was performed by receiver operating characteristic analysis, which suggested an optimum cut-off tissue elasticity value of 50 kPa, in agreement with earlier studies aimed at distinguishing between benign and malignant tissue. However, the diagnostic selectivity (and thus the diagnostic power) was poor (area under the curve 0.527, which

Markus Porsch, Claudia Görner, Johann Jakob Wendler, Uwe-Bernd Liehr, Anke Lux, Sandra Siedentopf, Martin Schostak, Maciej Pech

Journal of Ultrasonography, Volume 16 , ISSUE 67, 348–358

Research Article | 12-December-2017

1-5 NAPTHALENEDISULPHONIC ACID DOPED POLYPYRROLE THIN FILMS AS COATINGS TO OPTICAL FIBERS FOR ORGANOPHOSPHATE SENSING

study is conducted to monitor refractive index modulation in polypyrrole thin films upon DMMP exposure. The developed fiber optic sensor shows a sensitivity of 134ppm towards DMMP. Influence of sensing element length, sensing element diameter and input light intensity on the sensor response is investigated. The selectivity, environmental and thermal stability issues are also addressed.

Lalitkumar Bansal, Mahmoud. A. El-Sherif

International Journal on Smart Sensing and Intelligent Systems, Volume 3 , ISSUE 2, 230–252

Article | 01-September-2012

SYNTHESIS OF NANOSTRUCTURED ZrO2 FOR GAS SENSING APPLICATION

18 nm and 20 nm, respectively. Gas sensing properties of their thick films, which were fabricated by screen-printing to various gases (O2, NO2, C2H5OH, CO, CO2, NH3, LPG, H2S and H2) were tested in ambient air. The ZrO2 thick films showed a high response and selectivity to H2S gas. The effect of operating temperature, gas concentration on the sensing characteristics of these films towards H2S was discussed..

Pratap G. Patil, D. D. Kajale, V. P. Patil, G. E. Patil, G. H. Jain

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 3, 673–684

Research Article | 27-December-2017

NANOSTRUCTURED ZnCo2O4THICK FILM AS AN ETHANOL SENSOR

like Acetone, Ethanol and CO2. It was found that the sensors exhibited various sensing responses to these gases at different operating temperature. Furthermore, the sensor exhibited a fast response and a good recovery. The results demonstrated that ZnCo2O4 can be used as a new type of gas-sensing material which has a high sensitivity and good selectivity to Ethanol 200 ppm.

S. V. Bangale

International Journal on Smart Sensing and Intelligent Systems, Volume 7 , ISSUE 1, 178–195

Article | 01-March-2012

SYNTHESIS OF ZnO NANORODS BY HYDROTHERMAL METHOD FOR GAS SENSOR APPLICATIONS

interfering gases such as CO2, CO, Ethanol, NH3 and H2S etc at operating temperature from 30o (room temperature) to 300oC. The results indicate that the ZnO nanorod thick films showed much better sensitivity and stability than the conventional materials to H2S gas at 30oC. The nanoshaped pillar can improve the sensitivity and selectivity of the sensors. ZnO nanorods are excellent potential candidates for gas sensors.

Sarika D. Shinde, G. E. Patil, D. D. Kajale, D. V. Ahire, V. B. Gaikwad, G. H. Jain

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 1, 57–70

Article | 01-June-2012

SYNTHESIS OF SrTiO3 NANOPOWDER BY SOL-GEL- HYDROTHEMAL METHOD FOR GAS SENSING APPLICATION

. The transmission electron microscopic investigations have shown that the particle size of the as-prepared powder has a mean size of 34 nm. Then highly sensitive and selective sensors to H2S based on glass substrate were fabricated successfully by screen-printing technique. Sensitivity, selectivity, response time, and recovery time of the sensors were systematically investigated as a function of operating temperature, using H2S, CO, CO2, H2, Cl2, LPG, C2H5OH, O2, NH3 and NO2 as test gases. The

D. D. Kajale, G. E. Patil, V. B. Gaikwad, S. D. Shinde, D. N. Chavan, N. K. Pawar, S. R. Shirsath, G. H. Jain

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 2, 382–400

Article | 01-June-2012

Breath Analysis for Medical Diagnosis

produce odor fingerprints. Furthermore, recent work has shown it is possible to modify the basic sensor materials to both improve their performance, increase their tolerance to factors such as water vapour interferance which often leave the sensor system de-sensitized to the gaseous biomarkers, and enhance their selectivity. It will be shown how it is possible to accurately quantify concentrations of VOC’s and make disease diagnosis from analysis of the collected data which compare

Darryl Hill, Russell Binions

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 2, 401–440

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