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  • In Jour Smart Sensing And Intelligent Systems

 

Research Article | 27-December-2017

SYNTHESIS, CHARACTERIZATION AND GAS SENSING PERFORMANCE OF SOL-GEL PREPARED NANOCRYSTALLINE SnO2 THIN FILMS

Nanocrystalline SnO2 thin films were successfully prepared using sol-gel dip coating technique. The starting precursor was used as tin chloride dihydrate (SnCl2.2H2O), ethanol and glycerin. As the prepared films were fired at 500oC. These films were characterized using XRD, FESEM and TEM to known crystal structure, surface morphology and microstructure property. Elemental composition was studied using energy dispersive spectrophotometer (EDAX). The H2 gas sensing performance of nanocrystalline

Ramesh H. Bari, Sharad B. Patil, Anil.R. Bari

International Journal on Smart Sensing and Intelligent Systems, Volume 7 , ISSUE 2, 610–629

Article | 03-November-2017

TOWARDS A NEW GAS SENSOR MICROSYSTEM USING ELECTROACTIVE POLYMERS THIN FILMS

This paper describes the development of a new gas sensor device using some electroactive polymers in thin layers. The poly(fluoro-aluminium phthalocyanine) powder, (AlPcF)n, has been synthesized, then deposited by vacuum evaporation on alumina or silicon substrates in the form of thin films with control of the deposition rate. (AlPcF)n thin layers are doped by NO2 or O2 diluted at various concentrations in N2 and their conductivity variations are studied as a function of time, temperature and

Allal LARBI, Bachir DJEDOU, Layachi BENNACER, Mounir BOUSBIA-SALAH

International Journal on Smart Sensing and Intelligent Systems, Volume 2 , ISSUE 3, 448–462

Article | 03-November-2017

Enhanced LPG response characteristics of SnO2 thin film based sensors loaded with Pt clusters

RF sputtered SnO2 thin films (90 nm thick) loaded with clusters of nanoscale (8 nm) metal catalysts (Pt, Ag, Ni, Pb, Al, Pd) are investigated for LPG detection. SnO2 film loaded with Pt catalyst clusters exhibits enhanced response (~ 7.5×102) to 200 ppm of LPG at a relatively low operating temperature (185oC) with a fast response time of 100s. Variation of thickness of Pt clusters in the nanoscale range (2 to 20 nm) is seen to significantly influence the sensor response characteristics

Divya Haridas, Arijit Chowdhuri, K. Sreenivas, Vinay Gupta

International Journal on Smart Sensing and Intelligent Systems, Volume 2 , ISSUE 3, 503–514

Article | 01-September-2012

PREPARATION OF MoO3 THIN FILMS BY SPRAY PYROLYSIS AND ITS GAS SENSING PERFORMANCE

MoO3 thin films have been prepared by a simple spray pyrolysis technique at substrate temperature 250oC. The structure and morphology of thin films are characterized by X-ray powder diffraction (XRD), scanning electron microscopy and UV-vis spectroscopy. The gas sensing properties of MoO3 thin film is studied at gas concentration 400 ppm and working temperature of 100–400 oC. It was found that the sensitivity depended on the working temperatures and also H2S gas concentration. The results show

D. V. Ahire, S. D. Shinde, G. E. Patil, K. K. Thakur, V. B. Gaikwad, V. G. Wagh, G. H. Jain

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 3, 592–605

Research Article | 12-December-2017

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

1-5 Napthalenedisulphonic acid (NDSA) doped polypyrrole thin films are prepared by chemical oxidation polymerization and applied as modified claddings to optical fibers for organophosphate (dimethyl-methyl phosphonate, DMMP) sensing. DMMP sensing takes place via intensity modulation in multimode fibers due to refractive index modulation in polypyrrole films due to DMMP adsorption. The polypyrrole films are characterized by FTIR and Raman spectroscopy. Ellipsometry and thin film transmission

Lalitkumar Bansal, Mahmoud. A. El-Sherif

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

Article | 03-November-2017

MECHANISM OF TRACE LEVEL H2S GAS SENSING USING RF SPUTTERED SnO2 THIN FILMS WITH CuO CATALYTIC OVERLAYER

H2S gas sensing response characteristics of bare SnO2 thin films and heterostuctures with nanolayer (10 nm) of Cu and CuO are studied. Changes in resistance values, occurring with integration of Cu and CuO nanolayers on SnO2 is acquired real-time, and compared. Rise in sensor resistance after introduction of Cu and CuO nanolayers on SnO2 sensing layer is understood to enhance the sensing response characteristics. Formation of space charge region between p-type CuO and n-type SnO2 and difference

Arijit Chowdhuri, Divya Haridas, K. Sreenivas, Vinay Gupta

International Journal on Smart Sensing and Intelligent Systems, Volume 2 , ISSUE 4, 540–548

Research Article | 15-February-2020

Effect of TiO2 nano-overlays deposited with atomic layer deposition on refractive index sensitivity of long-period gratings

This paper we discusses an effect of coating longperiod gratings (LPGs) with a thin titanium dioxide (TiO2) overlays on refractive index (RI) sensitivity of the LPG. The overlays have been obtained using atomic layer deposition (ALD) method. The method allows for deposition well-controlled in thickness, well defined in optical properties, high-RI and very conformal thin films as required for optical fiber sensors. For the investigated LPGs we obtained sensitivity of 3490 to 6471 nm per RI unit

Krzysztof Krogulski, Mateusz Śmietana, Bartosz Michalak, Anna K. Dębowska, Łukasz Wachnicki, Sylwia Gierałtowska, Marek Godlewski, Magdalena Szymańska, Predrag Mikulic, Wojtek J. Bock

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

Research Article | 15-February-2020

Thickness Measurement of Aluminum Thin Film using Dispersion Characteristic  of Surface Acoustic Wave

In this study, we suggest a method to measure the thickness of thin films nondestructively using the dispersion characteristics of a surface acoustic wave propagating along the thin film surface. To measure the thickness of thin films, we deposited thin films with different thicknesses with range of 200~1000 nm on a Si(100) wafer by controlling the deposition time by DC sputtering technique. The thickness of the thin films was measured using a scanning electron microscope. Subsequently, the

Ik Keun Park, Tae Sung Park

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

Research Article | 15-February-2020

Optical Detection of Herbicides in Water using Dye- Modified Single Walled Carbon Nanotubes

Hybrid materials were produced by mixing CuPcR4 with acidified single-walled carbon nanotubes (SWCNTs) and characterised by UV-Vis absorption spectroscopy, scanning electron microscopy and atomic force microscopy. Thin films of pristine CuPcR4 and SWCNT/CuPcR4 were prepared by spin coating onto gold-coated glass slides and applied as active layers to detect pentachlorophenol (PCP), 2-chlorophenol, diuron and simazine in water utilizing Total Internal Reflection Ellipsometry (TIRE) as an optical

Hikmat Banimuslem, Aseel Hassan, Tamara Basova, Asuman Dakoğlu Gülmez, Mahmut Durmuş, Ayşe Gül Gürek, Vefa Ahsen

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

Research Article | 13-December-2017

HIGH SENSITIVITY METHANE SENSOR BY CHEMICALLY DEPOSITED NANOCRYSTALLINE ZNO THIN FILM

Nanocrystalline n-ZnO thin films were deposited on SiO2-coated (0.45 μm) p type Si substrates (10-20Ω-cm) by a low cost chemical deposition technique to fabricate ZnO-based resistive sensors for methane detection. The nanocrystalline ZnO needle like structures were grown on RCA cleaned p-Si substrates by successive immersion (100-200 times) into a Sodium Zincate bath (0.125M) kept at room temperature and DI water maintained at 90 oC . The Sodium Zincate was prepared by reacting Zinc Sulphate

Sunipa Roy, H. Saha, C. K. Sarkar

International Journal on Smart Sensing and Intelligent Systems, Volume 3 , ISSUE 4, 605–620

research-article | 30-November-2019

Study on the suitability of ZnO thin film for dynamic pressure sensing application

and can provide high purity films (Hoon et al., 2011; Alias et al., 2013). In the present work, RF reactive magnetron sputtering has been used to obtain good quality films with proper stoichiometry. Four samples of ZnO thin films with different thicknesses were prepared by varying deposition duration and these samples were characterized for composition, structural and morphological properties. Suitability of the prepared films for dynamic pressure sensing was evaluated using the shock tube test

Suma M. N., Venkateswarlu Gaddam, M. V. N. Prasad, M. M. Nayak, K. Rajanna

International Journal on Smart Sensing and Intelligent Systems, Volume 13 , ISSUE 1, 1–9

Research Article | 06-December-2011

Copper (II) oxide thin film for methanol and ethanol sensing

Mitesh Parmar, K. Rajanna

International Journal on Smart Sensing and Intelligent Systems, Volume 4 , ISSUE 4, 710–725

Article | 02-November-2017

STUDY OF SUPERHYDROPHILIC NANOPARTICLE-BASED ULTRA-THIN FILMS TOWARDS THE DEVELOPMENT OF OPTICAL FIBER HUMIDITY SENSORS

Miguel Hernaez, Ignacio R. Matias, Jesus M. Corres, Javier Goicoechea, Javier Bravo, Francisco J. Arregui

International Journal on Smart Sensing and Intelligent Systems, Volume 2 , ISSUE 1, 63–74

Research Article | 13-December-2017

A NOVEL METHOD FOR THE IMPROVEMENT IN THERMOELECTRIC PROPERTY OF TIN OXIDE THIN FILMS AND ITS APPLICATION IN GAS SENSING

Anuradha S, K. Rajanna

International Journal on Smart Sensing and Intelligent Systems, Volume 1 , ISSUE 2, 498–511

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