P2.7.9 TiO2 Nanohelix Gas Sensors with Enhanced Performance and Potential Application as a Building Block of Electronic Noses

2012 ◽  
Author(s):  
Sunyong Hwang ◽  
Hyunah Kwon ◽  
Sameer Chhajed ◽  
Jiseong Im ◽  
Sang Ho Oh ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Building Block ◽  
Potential Application ◽  
Electronic Noses

scholarly journals A Prototype to Detect the Alcohol Content of Beers Based on an Electronic Nose

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2646 ◽  
Author(s):  
Henike Guilherme Jordan Voss ◽  
José Jair Alves Mendes Júnior ◽  
Murilo Eduardo Farinelli ◽  
Sergio Luiz Stevan
Keyword(s):  
Metal Oxide ◽  
Electronic Nose ◽  
Gas Sensors ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Alcohol Content ◽  
Electronic Noses

Due to the emergence of new microbreweries in the Brazilian market, there is a need to construct equipment to quickly and accurately identify the alcohol content in beverages, together with a reduced marketing cost. Towards this purpose, the electronic noses prove to be the most suitable equipment for this situation. In this work, a prototype was developed to detect the concentration of ethanol in a high spectrum of beers presents in the market. It was used cheap and easy-to-acquire 13 gas sensors made with a metal oxide semiconductor (MOS). Samples with 15 predetermined alcohol contents were used for the training and construction of the models. For validation, seven different commercial beverages were used. The correlation (R2) of 0.888 for the MLR (RMSE = 0.45) and the error of 5.47% for the ELM (RMSE = 0.33) demonstrate that the equipment can be an effective tool for detecting the levels of alcohol contained in beverages.

Biopolymer based ionogels as active layers in low-cost gas sensors for electronic noses

2020 ◽  
Vol 315 ◽  
pp. 128025 ◽  
Author(s):  
Mariana M.O. Netto ◽  
Wellington B. Gonçalves ◽  
Rosamaria W.C. Li ◽  
Jonas Gruber
Keyword(s):  
Gas Sensors ◽  
Low Cost ◽  
Electronic Noses ◽  
Active Layers

Synthesis of a novel poly(p-phenylene-vinylene) derivative and its application in chemiresistive sensors for electronic noses with an unusual response to organic vapours

e-Polymers ◽  
2004 ◽  
Vol 4 (1) ◽  
Author(s):  
Jonas Gruber ◽  
Eduardo K. C. Yoshikawa ◽  
Ying Bao ◽  
Herman J. Geise
Keyword(s):  
Gas Sensors ◽  
Energy Gap ◽  
Average Molecular Weight ◽  
Phenylene Vinylene ◽  
Electronic Noses ◽  
Good Solubility ◽  
Relative Response ◽  
Quantitative Analyses ◽  
C Doping ◽  
Good Linear Correlation

Abstract We report the synthesis of a novel poly(p-phenylene-vinylene) derivative bearing dodecanoylsulfanyl side-groups (12COS-PPV). Good solubility in organic solvents was achieved. The average molecular weight was around 30 000, the energy gap 2.8 eV and the thermal stability up to 130°C. Doping with iodine vapours rose conductivity to 2·10-6 S/cm. Gas sensors made from FeCl3-doped 12COS-PPV showed an unusual behaviour responding to only four of the eight different organic solvent vapours tested. Recoveries from the responses are not complete, but are reproducible and can be used to discriminate between the four solvents. Quantitative analyses are also possible since there is a good linear correlation between relative response and concentration.

New composite porphyrin-conductive polymer gas sensors for application in electronic noses

2014 ◽  
Vol 193 ◽  
pp. 136-141 ◽  
Author(s):  
Carlos H.A. Esteves ◽  
Bernardo A. Iglesias ◽  
Rosamaria W.C. Li ◽  
Takuji Ogawa ◽  
Koiti Araki ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Conductive Polymer ◽  
Electronic Noses

HILBERT–HUANG TRANSFORM FOR FEATURE EXTRACTION OF TEMPERATURE MODULATED MOS SENSORS

2013 ◽  
Vol 09 (03n04) ◽  
pp. 1350014
Author(s):  
MARK LIEBERMAN ◽  
RADU MURESAN ◽  
SIMON X. YANG ◽  
DAVID DOYLE
Keyword(s):  
Feature Extraction ◽  
Gas Sensors ◽  
Temperature Modulation ◽  
Hilbert Spectrum ◽  
Extraction Mechanism ◽  
Electronic Noses ◽  
Hilbert Huang Transform ◽  
Mode Decomposition ◽  
Frequency Components ◽  
Potential Use

This work investigates the potential use of temperature modulation of MOS gas sensors combined with the Hilbert–Huang transform (HHT) as a feature extraction mechanism for MOS-based electronic noses. Five samples each of ethyl acetate, ethanol and isopropanol were prepared. The response of each of four sensors in an array was decomposed using empirical mode decomposition and the marginal Hilbert spectrum was computed. A set of 72 frequency components was extracted from marginal Hilbert spectrum response of each sensor in an array of four sensor to produce a 288 element fingerprint of each sample. The fingerprints were successfully clustered using PCA and classified using a SVM neutral network.

Ion Jelly: a novel sensing material for gas sensors and electronic noses

2014 ◽  
Vol 2 (4) ◽  
pp. 696-700 ◽  
Author(s):  
Tânia Carvalho ◽  
Pedro Vidinha ◽  
Bruna R. Vieira ◽  
Rosamaria W. C. Li ◽  
Jonas Gruber
Keyword(s):  
Gas Sensors ◽  
Electronic Noses ◽  
Sensing Material

Synthesis and characterization of combinatorial libraries of semiconductor gas sensors.

2003 ◽  
Vol 804 ◽  
Author(s):  
M. A. Aronova ◽  
K. S. Chang ◽  
I. Takeuchi ◽  
H. Jabs ◽  
D. Westerheim ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Pulsed Laser ◽  
Combinatorial Libraries ◽  
High Sensitivity ◽  
Pulsed Laser Ablation ◽  
Electronic Noses ◽  
Sensitivity And Selectivity ◽  
Semiconductor Gas Sensors ◽  
Array Geometry

ABSTRACTWe have fabricated thin-film combinatorial gas sensor libraries based on doped semiconducting SnO2 thin films. The utility of combinatorial libraries is two-fold: one is to search and optimize the compositions for high sensitivity and selectivity of gases, and the other is to make use of the natural array geometry of the libraries with different sensor elements for electronic noses. Combinatorial pulsed-laser ablation was used to deposit compositionally varying arrays of sensor elements onto a pre-patterned device electrode configuration. Using a multiplexing electronics, we have demonstrated detection of chloroform, formaldehyde, and benzene gases at concentrations down to 12.5 ppm through pattern recognition of signals from the arrays of sensors.

Endohedral metallofullerenes, M@C60 (M = Ca, Na, Sr): selective adsorption and sensing of open-shell NOx gases

2016 ◽  
Vol 18 (31) ◽  
pp. 21315-21321 ◽  
Author(s):  
Sherif Abdulkader Tawfik ◽  
X. Y. Cui ◽  
S. P. Ringer ◽  
C. Stampfl
Keyword(s):  
Density Functional Theory ◽  
Gas Sensors ◽  
Potential Application ◽  
Density Functional ◽  
Selective Adsorption ◽  
Open Shell ◽  
Functional Theory ◽  
Endohedral Metallofullerenes ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

Based on density-functional theory and non-equilibrium Green's function calculations, we demonstrate that endohedral metallofullerenes (EMFs) are reactive to open-shell gases, and therefore have the potential application as selective open-shell gas sensors.

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