Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260964
G. Kale
Metal oxides in different length scales have been used as sensing materials for designing gas sensors for several years. A number of sensor architectures have been explored for developing selective gas sensors that are capable of discriminating between reducing and oxidising gases as well as amongst the gases that are either reducing or oxidising. There is an immense drive towards developing highly selective gas sensors for continuous environmental monitoring and in-line process control in both benign and hostile conditions. Some of the desirable essential features of a typical gas sensor are (1) the ability to discriminate between gases in a real mixture of gases at all temperatures, (2) fast response, (3) rapid recovery, (4) high sensitivity, (5) size, (6) manufacturability, (7) cost effectiveness, (8) signal reproducibility, (9) robustness of signal, (10) compatibility with data logging system and (11) wireless communication. Many of these aspects strongly depend on the synthetic chemistry, crystal structure, film thickness, particle size, porosity, morphology, composition and catalytic properties of the sensing material.This paper will attempt to illustrate how gas sensors research has evolved over the number of years with the advancement in physics and chemistry of materials and what does the future holds for the technology.
{"title":"Gas sensing oxide materials and methods - past, present and future","authors":"G. Kale","doi":"10.1109/ISPTS.2012.6260964","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260964","url":null,"abstract":"Metal oxides in different length scales have been used as sensing materials for designing gas sensors for several years. A number of sensor architectures have been explored for developing selective gas sensors that are capable of discriminating between reducing and oxidising gases as well as amongst the gases that are either reducing or oxidising. There is an immense drive towards developing highly selective gas sensors for continuous environmental monitoring and in-line process control in both benign and hostile conditions. Some of the desirable essential features of a typical gas sensor are (1) the ability to discriminate between gases in a real mixture of gases at all temperatures, (2) fast response, (3) rapid recovery, (4) high sensitivity, (5) size, (6) manufacturability, (7) cost effectiveness, (8) signal reproducibility, (9) robustness of signal, (10) compatibility with data logging system and (11) wireless communication. Many of these aspects strongly depend on the synthetic chemistry, crystal structure, film thickness, particle size, porosity, morphology, composition and catalytic properties of the sensing material.This paper will attempt to illustrate how gas sensors research has evolved over the number of years with the advancement in physics and chemistry of materials and what does the future holds for the technology.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"33 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76552637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260889
K. Stanly Jacob, P. A. Abraham, N. Rani Panicker, N. C. Pramanik
Mesoporous silicates have been investigated extensively in recent years for use in sensor systems. Silica aerogels are remarkable for their unique and exceptional properties like high surface area, high meso porosity, low density and tunable pore size and finds potential application in the field of sensor fabrication. Silica gels were prepared through sol-gel process and converted into silica aerogel through super critical drying method using isopropyl alcohol as a solvent. The surface area, pore size distribution, micropore analysis, was carried out using BET method. Low density silica aerogel with 0.30 g/cm3-density and surface area of 350–650 m2/g were prepared.
{"title":"Preparation and nitrogen sorption characteristics of Silica aerogel suitable for sensor applications","authors":"K. Stanly Jacob, P. A. Abraham, N. Rani Panicker, N. C. Pramanik","doi":"10.1109/ISPTS.2012.6260889","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260889","url":null,"abstract":"Mesoporous silicates have been investigated extensively in recent years for use in sensor systems. Silica aerogels are remarkable for their unique and exceptional properties like high surface area, high meso porosity, low density and tunable pore size and finds potential application in the field of sensor fabrication. Silica gels were prepared through sol-gel process and converted into silica aerogel through super critical drying method using isopropyl alcohol as a solvent. The surface area, pore size distribution, micropore analysis, was carried out using BET method. Low density silica aerogel with 0.30 g/cm3-density and surface area of 350–650 m2/g were prepared.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"15 1","pages":"96-97"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90755403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260947
R. K. Gangwar, V. Dhumale, Arvind Kumar, P. Alegaonkar, Rishi Sharma, Suwarna Datar
Gold-graphene (Au-G) nanocomposite has been synthesized by wet chemical method. Synthesized Au-G nanocomposite was examined under the UV-vis spectroscopy and transmission electron microscopy (TEM). Further Au-G nanocomposite was drop casted onto the glassy carbon electrode (GCE) by immobilizing glucose oxidase (GOx) into it for the electrochemical detection of glucose. Fabricated sensor demonstrates good linear response to glucose in the range 3 to 18 mM with linearity coefficient 0.964.
{"title":"Gold-graphene nanocomposite based ultrasensitive electrochemical glucose sensor","authors":"R. K. Gangwar, V. Dhumale, Arvind Kumar, P. Alegaonkar, Rishi Sharma, Suwarna Datar","doi":"10.1109/ISPTS.2012.6260947","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260947","url":null,"abstract":"Gold-graphene (Au-G) nanocomposite has been synthesized by wet chemical method. Synthesized Au-G nanocomposite was examined under the UV-vis spectroscopy and transmission electron microscopy (TEM). Further Au-G nanocomposite was drop casted onto the glassy carbon electrode (GCE) by immobilizing glucose oxidase (GOx) into it for the electrochemical detection of glucose. Fabricated sensor demonstrates good linear response to glucose in the range 3 to 18 mM with linearity coefficient 0.964.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"12 1","pages":"282-285"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85189216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260930
R. Hatwar, P. Gandhi, M. D. Atre, Chandrakant Patel, V. Giramkar, S. Joseph, G. Phatak
Several MEMS applications including microturbines, engines, and micro heat exchangers demand ultra high pressure and temperature withstanding microchannels. This paper focuses on design and analysis of such microchannels fabricated using LTCC technology. Extensive FE simulations and analysis are carried out to characterize various design parameters enabling their proper selection. An empirical model with nondimensional variables is proposed to extend applicability of results to high-pressure microchannels of other materials and a typical range of dimensions. Several microchannels are fabricated and tested to pressures upto 8 MPa. Results show that the radius at the corners of microchannels is a significant governing parameter.
{"title":"Analysis, fabrication and testing of ultra high pressure microchannels using LTCC technology","authors":"R. Hatwar, P. Gandhi, M. D. Atre, Chandrakant Patel, V. Giramkar, S. Joseph, G. Phatak","doi":"10.1109/ISPTS.2012.6260930","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260930","url":null,"abstract":"Several MEMS applications including microturbines, engines, and micro heat exchangers demand ultra high pressure and temperature withstanding microchannels. This paper focuses on design and analysis of such microchannels fabricated using LTCC technology. Extensive FE simulations and analysis are carried out to characterize various design parameters enabling their proper selection. An empirical model with nondimensional variables is proposed to extend applicability of results to high-pressure microchannels of other materials and a typical range of dimensions. Several microchannels are fabricated and tested to pressures upto 8 MPa. Results show that the radius at the corners of microchannels is a significant governing parameter.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"489 1","pages":"224-227"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77782818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260943
V. Devaraj, S. Dinil, M.S. Diju, S. Vineeth, A. Jose, M. Jyothy, M. Neethu
Wireless sensor networks are considered to be one of the key technologies of 21st century. A wireless sensor network consists of spatially distributed sensors used to monitor physical and environmental conditions. The application of wireless sensor networks includes battle field surveillance, industrial process monitoring, environmental pollution monitoring etc. A wireless sensor network generally consists of tens/hundreds of sensor nodes. Each sensor network node consists of a radio transceiver with an antenna, a microcontroller, an electronic circuit for interfacing with the sensors and an energy source. A microcontroller require 1.8mW, transceiver require 67 mW while transmitting and 60 mW while receiving and sensing will require 1.8 mW. Total power needed will come around 75 mW. Here a compact PEM fuel cell is designed which can meet the above power requirements and a typical power generation system is proposed.
{"title":"PEM fuel cells as a power source for wireless sensor networks","authors":"V. Devaraj, S. Dinil, M.S. Diju, S. Vineeth, A. Jose, M. Jyothy, M. Neethu","doi":"10.1109/ISPTS.2012.6260943","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260943","url":null,"abstract":"Wireless sensor networks are considered to be one of the key technologies of 21st century. A wireless sensor network consists of spatially distributed sensors used to monitor physical and environmental conditions. The application of wireless sensor networks includes battle field surveillance, industrial process monitoring, environmental pollution monitoring etc. A wireless sensor network generally consists of tens/hundreds of sensor nodes. Each sensor network node consists of a radio transceiver with an antenna, a microcontroller, an electronic circuit for interfacing with the sensors and an energy source. A microcontroller require 1.8mW, transceiver require 67 mW while transmitting and 60 mW while receiving and sensing will require 1.8 mW. Total power needed will come around 75 mW. Here a compact PEM fuel cell is designed which can meet the above power requirements and a typical power generation system is proposed.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"115 1","pages":"269-273"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91493529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260932
A. Axelsson, F. Aguesse, M. Valant, N. Alford
Multi-functional materials can respond to more than one external stimulus. Here we will present a magneto-electric system, which couples two switchable states; polarization and magnetisation. In magneto-electric materials, magnetic domains can be tuned by the application of an external electric field and electric domains are switched by a magnetic field via a magneto-electric coupling (ME) across the oxide interface. This two-order coupling can be effectively utilized in the development of multiple state memory elements, tuneable magneto-electric inductors where the electric field tunes the permeability in a voltage variable self-inductance device or as magnetic sensors where the magnetic field produces an electric signal. In the case of magnetic field sensors, their sensitivity, room temperature operation and zero power consumption are particularly attractive. In the area of power electronics such materials show potential as high-quality variable inductors, where miniaturisation of the inductors could enable small, lightweight products.
{"title":"Design and characterization of magneto-electric sensors. What are the limits?","authors":"A. Axelsson, F. Aguesse, M. Valant, N. Alford","doi":"10.1109/ISPTS.2012.6260932","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260932","url":null,"abstract":"Multi-functional materials can respond to more than one external stimulus. Here we will present a magneto-electric system, which couples two switchable states; polarization and magnetisation. In magneto-electric materials, magnetic domains can be tuned by the application of an external electric field and electric domains are switched by a magnetic field via a magneto-electric coupling (ME) across the oxide interface. This two-order coupling can be effectively utilized in the development of multiple state memory elements, tuneable magneto-electric inductors where the electric field tunes the permeability in a voltage variable self-inductance device or as magnetic sensors where the magnetic field produces an electric signal. In the case of magnetic field sensors, their sensitivity, room temperature operation and zero power consumption are particularly attractive. In the area of power electronics such materials show potential as high-quality variable inductors, where miniaturisation of the inductors could enable small, lightweight products.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"22 8","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91439661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260967
Kaveri Kadam, Navin Srivastava
Traditionally, protocols and applications in the networking domain have been designed to work in large-scale heterogeneous, hierarchically organized networks with low failure rate. In a Wireless Sensor Network (WSN) scenario, new problems arise and traditional routing protocols cannot be successfully applied. Additionally, in energy-restricted environments like WSNs the overhead of keeping routing information fresh becomes unbearable. In this problem context problem context, many researchers have turned their attention to the domain of machine learning (ML). The goal of this paper is to analyze the application of the Reinforcement Learning (specifically Q-learning) for an energy- aware routing scenario.
{"title":"Application of machine learning (reinforcement learning) for routing in Wireless Sensor Networks (WSNs)","authors":"Kaveri Kadam, Navin Srivastava","doi":"10.1109/ISPTS.2012.6260967","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260967","url":null,"abstract":"Traditionally, protocols and applications in the networking domain have been designed to work in large-scale heterogeneous, hierarchically organized networks with low failure rate. In a Wireless Sensor Network (WSN) scenario, new problems arise and traditional routing protocols cannot be successfully applied. Additionally, in energy-restricted environments like WSNs the overhead of keeping routing information fresh becomes unbearable. In this problem context problem context, many researchers have turned their attention to the domain of machine learning (ML). The goal of this paper is to analyze the application of the Reinforcement Learning (specifically Q-learning) for an energy- aware routing scenario.","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"46 1","pages":"349-352"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83669120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260972
A. Vinu
Nanoporous non-siliceous materials such as carbons, nitrides, and phosphides have attracted much attention in the recent years due to their enormous applications in the fields of adsorption, catalysis, and fuel cells. However, the incorporation of hetero atoms such as boron and nitrogen in the non-siliceous materials can significantly change their electronic and semi-conducting properties. Firstly I will present some results about the discovery of the nanoporous carbon and nitride materials, and the basics and the mechanism behind the synthesis of various nanoporous nitride materials with different pore structure and textural parameters. Then, the preparation, characterization and the applications of one and three dimensional nanoporous carbon nitrides materials synthesized using various inorganic templates with the different pore structures (MCN-11,2 and MCN-23) through a simple polymerization reaction between ethylenediamine (EDA) and carbon tetrachloride (CTC) will be presented. Moreover, the methods to control the textural parameters and the nitrogen content of the nanoporous carbon nitride materials, which have been solely developed in my group, will also be discussed.4 Not only the powder materials but also the different ways for the fabrication of nanoporous carbon nitride nanoparticles and films with hierarchical ordered structure and morphology will be demonstrated. In addition, I will show some of the results on the preparation of nanoporous boron nitride (MBN) and boron carbon nitride (MBCN) which have been prepared by novel elemental substitution technique5 using nanoporous carbon as the template at very high temperature. In the last part of the talk, I briefly discuss about the different ways of preparing nanoporous carbon materials with various structure types, especially “Carbon Nanocage and Carbon Nanocoops”, and to tune the pore diameters and textural parameters. The applications of the materials including sensing of different molecules and biosensing will be discussed in detail.6−12
{"title":"Nanoporous materials for energy related and sensing applications","authors":"A. Vinu","doi":"10.1109/ISPTS.2012.6260972","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260972","url":null,"abstract":"Nanoporous non-siliceous materials such as carbons, nitrides, and phosphides have attracted much attention in the recent years due to their enormous applications in the fields of adsorption, catalysis, and fuel cells. However, the incorporation of hetero atoms such as boron and nitrogen in the non-siliceous materials can significantly change their electronic and semi-conducting properties. Firstly I will present some results about the discovery of the nanoporous carbon and nitride materials, and the basics and the mechanism behind the synthesis of various nanoporous nitride materials with different pore structure and textural parameters. Then, the preparation, characterization and the applications of one and three dimensional nanoporous carbon nitrides materials synthesized using various inorganic templates with the different pore structures (MCN-11,2 and MCN-23) through a simple polymerization reaction between ethylenediamine (EDA) and carbon tetrachloride (CTC) will be presented. Moreover, the methods to control the textural parameters and the nitrogen content of the nanoporous carbon nitride materials, which have been solely developed in my group, will also be discussed.4 Not only the powder materials but also the different ways for the fabrication of nanoporous carbon nitride nanoparticles and films with hierarchical ordered structure and morphology will be demonstrated. In addition, I will show some of the results on the preparation of nanoporous boron nitride (MBN) and boron carbon nitride (MBCN) which have been prepared by novel elemental substitution technique5 using nanoporous carbon as the template at very high temperature. In the last part of the talk, I briefly discuss about the different ways of preparing nanoporous carbon materials with various structure types, especially “Carbon Nanocage and Carbon Nanocoops”, and to tune the pore diameters and textural parameters. The applications of the materials including sensing of different molecules and biosensing will be discussed in detail.6−12","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"39 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88275056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260965
R. K. Kolhe, K. Kulkarni, K. Sonawane, M. More, S. Gosavi
Thin films of indium doped zinc oxide (In:ZnO) have been deposited onto glass substrates using a facile and inexpensive Spray Pyrolysis method. To reveal the effect of indium concentration on the gas sensing characteristics, thin films were synthesized using different concentration of indium in the precursor. X-ray diffraction (XRD) study indicates formation of crystalline phase of zinc oxide under the prevailing experimental conditions. The scanning electron microscope (SEM) images reveal uniform deposition on the entire substrate surface characterized by granular morphology. A careful observation of the SEM images reveals that nanocrystalline nature of the films, with average grain size ∼ 300 nm. The elemental composition obtained from the Energy Dispersive X-ray Analysis (EDAX) confirms presence of indium along with zinc and oxygen in the synthesized thin films. The gas sensing characteristics of the In-ZnO2 films were investigated for Liquefied Petroleum Gas (LPG) vapours at different operating temperatures in the range of 200 to 320 °C and various vapour concentration values. Interestingly, the In-ZnO thin films exhibited good sensor response in the operating temperature range. The response and recovery times are also in the range of few tens of second. The present results indicate that spray synthesized In-ZnO films have potential towards detection of LPG vapours
{"title":"Synthesis and characterization of In doped ZnO thin films for LPG sensing","authors":"R. K. Kolhe, K. Kulkarni, K. Sonawane, M. More, S. Gosavi","doi":"10.1109/ISPTS.2012.6260965","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260965","url":null,"abstract":"Thin films of indium doped zinc oxide (In:ZnO) have been deposited onto glass substrates using a facile and inexpensive Spray Pyrolysis method. To reveal the effect of indium concentration on the gas sensing characteristics, thin films were synthesized using different concentration of indium in the precursor. X-ray diffraction (XRD) study indicates formation of crystalline phase of zinc oxide under the prevailing experimental conditions. The scanning electron microscope (SEM) images reveal uniform deposition on the entire substrate surface characterized by granular morphology. A careful observation of the SEM images reveals that nanocrystalline nature of the films, with average grain size ∼ 300 nm. The elemental composition obtained from the Energy Dispersive X-ray Analysis (EDAX) confirms presence of indium along with zinc and oxygen in the synthesized thin films. The gas sensing characteristics of the In-ZnO2 films were investigated for Liquefied Petroleum Gas (LPG) vapours at different operating temperatures in the range of 200 to 320 °C and various vapour concentration values. Interestingly, the In-ZnO thin films exhibited good sensor response in the operating temperature range. The response and recovery times are also in the range of few tens of second. The present results indicate that spray synthesized In-ZnO films have potential towards detection of LPG vapours","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"62 1","pages":"346-348"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79153783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-03-07DOI: 10.1109/ISPTS.2012.6260906
Prolay Sharma, Arunangshu Ghosh, B. Tudu, R. Bandyopadhyay, N. Bhattacharyya, A. Chatterjee
The quality evaluation of black tea is based on organoleptic methods of “Tea- tasters”. However the present quality estimation involving Tea-tasters is not a very reliable method as professional acumen, mood and other personal factors affect the judgment of tea quality. Electronic nose consists of an array of gas sensors with overlapping selectivity patterns, signal handling and classifier modules. An array of quartz crystal microbalance (QCM) sensors has been developed to differentiate among different tea samples. The important volatile components responsible for aroma of tea have been considered and the corresponding sensing materials have been identified. Five AT-cut 10 MHz Quartz crystal blanks coated with different sensing materials have been used to differentiate the aroma of orthodox and cut-tear-curl (CTC) tea samples. The developed sensors can distinguish not only between the orthodox and CTC tea but distinct clusters are also obtained for the four different tea-samples, as visualized through principal component analysis (PCA).
{"title":"Quartz crystal microbalance sensors for discrimination of black tea","authors":"Prolay Sharma, Arunangshu Ghosh, B. Tudu, R. Bandyopadhyay, N. Bhattacharyya, A. Chatterjee","doi":"10.1109/ISPTS.2012.6260906","DOIUrl":"https://doi.org/10.1109/ISPTS.2012.6260906","url":null,"abstract":"The quality evaluation of black tea is based on organoleptic methods of “Tea- tasters”. However the present quality estimation involving Tea-tasters is not a very reliable method as professional acumen, mood and other personal factors affect the judgment of tea quality. Electronic nose consists of an array of gas sensors with overlapping selectivity patterns, signal handling and classifier modules. An array of quartz crystal microbalance (QCM) sensors has been developed to differentiate among different tea samples. The important volatile components responsible for aroma of tea have been considered and the corresponding sensing materials have been identified. Five AT-cut 10 MHz Quartz crystal blanks coated with different sensing materials have been used to differentiate the aroma of orthodox and cut-tear-curl (CTC) tea samples. The developed sensors can distinguish not only between the orthodox and CTC tea but distinct clusters are also obtained for the four different tea-samples, as visualized through principal component analysis (PCA).","PeriodicalId":6431,"journal":{"name":"2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)","volume":"8 1","pages":"153-156"},"PeriodicalIF":0.0,"publicationDate":"2012-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76317004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：