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  • In Jour Smart Sensing And Intelligent Systems

 

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

Research paper | 13-December-2017

HYDROGEN GAS SENSING PERFORMANCE OF Pt/SnO2 NANOWIRES/SiC MOS DEVICES

This paper presents material and gas sensing properties of Pt/SnO2 nanowires/SiC metal oxide semiconductor devices towards hydrogen. The SnO2 nanowires were deposited onto the SiC substrates by vapor-liquid-solid growth mechanism. The material properties of the sensors were investigated using scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The current-voltage characteristics have been analyzed. The effective change in the barrier height for 1

M. Shafiei, K. Kalantar-zadeh, W. Wlodarski, E. Comini, M. Ferroni, G. Sberveglieri, S. Kaciulis, L. Pandolfi

International Journal on Smart Sensing and Intelligent Systems, Volume 1 , ISSUE 3, 771–783

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 | 13-December-2017

NANOSENSORS ENGINEERING:I. STRUCTURALLY MODULATED SnO2 NANOWIRES

The results of research aimed at the gas sensing nanowires (NWs) engineering are presented. Structurally modulated SnO2 NWs were obtained at 900oС in the modified vapor-solid process, allowing that NW morphology could be encoded in a programmable way along its length. PVD technique was used for Ti/Au electrical contacts deposition and gas sensitive nanoscale chemiresistors formation. Created nanostructures were characterized for their gas sensing performance. It was established that

S. Dmitriev

International Journal on Smart Sensing and Intelligent Systems, Volume 3 , ISSUE 4, 643–654

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

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 | 01-June-2015

BREATH ACETONE-BASED NON-INVASIVE DETECTION OF BLOOD GLUCOSE LEVELS

There has been a constant demand for the development of non-invasive, sensitive glucose sensor system that offers fast and real-time electronic readout of blood glucose levels. In this article, we propose a new system for detecting blood glucose levels by estimating the concentration of acetone in the exhaled breath. A TGS822 tin oxide (SnO2) sensor has been used to detect the concentration of acetone in the exhaled air. Acetone in exhaled breath showed a correlation with the blood glucose

Anand Thati, Arunangshu Biswas, Shubhajit Roy Chowdhury, Tapan Kumar Sau

International Journal on Smart Sensing and Intelligent Systems, Volume 8 , ISSUE 2, 1244–1260

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