The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Monika Czugala - One of the best experts on this subject based on the ideXlab platform.
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Development of fully functional microfluidic based platforms for rapid on-site Water Quality Analysis
2013Co-Authors: Monika CzugalaAbstract:Environmental monitoring has grown substantially in recent years in response to increasing concerns over the contamination of natural, industrial, and urban areas with potentially harmful chemical agents. Traditional monitoring of Water contamination is based upon manual in-situ ‘grab’ sampling followed by laboratory testing. Advantages of this strategy include high precision and accuracy of the measurements, however because of the expense involved in maintaining these facilities there are inherent restrictions in terms of spatial and temporal sampling. In contrast, in-situ measurements generated with portable instruments present a much more scalable model, enabling denser monitoring. The challenge is to develop inexpensive and reliable devices that can be used in-situ, with the capability to make the resulting data available remotely via web-databases, so that Water Quality can be monitored independently of location. Miniaturisation of analytical devices through the advent of microfluidics has brought wide opportunities for Water Analysis applications. The vision is to miniaturise processes typically performed in a central clinical lab into small, simple to use devices – so called lab-on-a-chip (LOC) systems. Microfludic systems are especially promising for point-of-care applications due to the low cost, low reagent consumption and portability, and the focus of this thesis is to provide novel microfluidic platforms towards an integrated system for Water Quality Analysis. A main outcome of my work was the development and validation of innovative integrated systems that were designed and developed for quantitative Analysis of turbidity and qualitative Analysis of pH and nitrites in Water samples. The microfluidic manifolds were designed and fabricated using rapid prototyping techniques such as soft lithography and CO2 laser cutting. For fluid propulsion, various methods were employed: back pressure, capillary forces (typical microfluidic manifolds) and centrifugal force (centrifugal discs). In the latter, fluid propulsion was performed by the forces induced due to the rotation of the disc, thus eliminating the need for external pumps since only a spindle motor is necessary to rotate the disc. Centrifugal discs systems are especially promising for point-of-care applications, and as a final output the fully integrated portable wireless system for in-situ colorimetric Analysis was demonstrated. In all systems a low cost but highly sensitive paired emitter- detector diode (PEDD) method was employed to perform colorimetric measurements. Moreover, due to the wireless communication, acquisition parameters were controlled remotely and the results were downloaded from distant locations and displayed in real time. The autonomous capabilities of the system, combined with the portability and wireless communication, provide the basis for a flexible new approach for on-site Water monitoring. In addition, their small size and low weight offered the advantage of portability. The suitability of the low-power analysers for the precise and continuous measurement of samples was established, since the analysers exhibited low limits of detection. FreshWater samples were analysed and the results were compared to those generated with a conventional bench-top instruments showing good agreement. Additionally, stimuli-responsive materials based on N- isopropylacrylamide (NIPAAm) phosphonium ionogels were characterised and incorporated within microfluidic platforms as sensors and actuators. The phase change NIPAAm ionogel functionalised with spirobenzopyran chromophores was characterised and applied for fluid control within microfluidic manifold. Microvalve actuation was performed by the localised white light irradiation, thus allowing for non-contact manipulation of the liquids inside of the microchannels. This is the first time that photoresponsive ionogel microvalves were incorporated within portable, wireless integrated microfluidic analytical platform. Moreover, phosphonium based ionogels incorporating pH sensing dye were used for pH sensing of Water samples. This work presents the core technology for an integrated microfluidic platforms for fundamental research as well as for point-of-use applications.# The key outputs of my work are: 1.Design, fabrication and characterisation of novel microfluidic manifolds. 2.Stimuli-responsive ionogel materials were successfully employed within microfluidic devices for sensing and actuating applications. 3.Portable, wireless, integrated systems based on microfluidic platforms were developed and their successful application for Analysis of pH, turbidity and nitrites was demonstrated.
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Photo-actuated ionogel microvalves for real-time Water Quality Analysis in a micro-fluidic device
2012Co-Authors: Monika Czugala, Pedro Martinez Ortiz, Andreu Llobera, Dermot Diamond, Fernando Benito-lopezAbstract:In the recent years, advances in micro-fluidic techniques for environmental applications have brought wide opportunities for improving of the capacity to monitor Water Quality. However, the development of fully integrated micro-fluidic devices capable of performing complex functions requires the integration of mico-valve with appropriate performance, since they are essential tools for the control and manipulation of flows in micro-channels.[1] The incorporation of ionic liquids within responsive gel matrices (ionogels) produces hybrid materials with many advantages over conventional materials. Depending on the ionic liquid, ionogels give the possibility of tuning several micro-valve actuation times and so independently control liquid flows within the channels under a common illumination source.[2] The undeniable advantage of these materials arise from the use of non invasive, non-contact stimuli such as light, offering improvements in versatility during manifold fabrication, and control of the actuation mechanism. Here we present an attractive approach for Water Quality Analysis, nitrite determination, based on photo-switchable ionogel actuators wherein the micro-valve opening/closing mechanism is controlled by simply applying localised white light irradiation using optical fibres. The nitrite concentration of Water samples is detected by a highly sensitive, low cost wireless paired emitter detector diode device. [1] M. Czugala et. al., “Materials Science: The Key to Revolutionary Breakthroughs in Micro-fluidic Devices”, Proceedings SPIE 8107, 81070C, (2011); doi:10.1117/12.895330. [2] F. Benito-Lopez et. al., Ionogel-based light-actuated valves for controlling liquid flow in micro-fluidic manifolds, Lab Chip 10, (2010), 195-201
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Novel optical sensing system based on wireless paired emitter detector diode device for lab on a disc Water Quality Analysis
2011Co-Authors: Monika Czugala, Dermot Diamond, Fernando Benito-lopezAbstract:Increased demand for improved Water management is a driving need for Water Quality monitoring systems with greatly improved price/performance characteristics. Typical Analysis methods are very costly and time consuming, therefore simple, rapid, accurate, cost-effective field-deployable sensors incorporating wireless communication capabilities need to be developed [1]. The main requirements of these sensors such as reproducibility, low cost as well as selectivity and sensitivity must be met for scale-up and mass fabrication allowing for real-time monitoring as well as widespread field deployment. The first use of a wireless paired emitter detector diode (PEDD) as an optical sensor for Water Quality monitoring in a lab-on-a-disc device will be presented. The microfluidic platform is based on a pH dye/ionogel sensing area, combined with a low-cost, wireless optical sensor, PEDD, for monitoring the pH and the degree of turbidity of Water samples in real time. So far, environmental Water Quality Analysis has been provided by standard lab-on-a-chip systems [2], but not by centrifugal disc (CDs) platforms, which offer many advantages such as the elimination of large power supplies and external pumps.[3] The PEDD device involves two light emitting diodes (LEDs), placed above and below the sensing area. The resulting system is portable, incorporates wireless communication and is completely sustained via a small lithium polymer battery, Figure 1a. The sensing function is provided by a pH indicator dye, which is immobilized within an ionogel polymer matrix, Figure 1b. We believe that this device will be of special interest in samples with a relatively high level of solid contaminants that could interfere with optical analytical measurements.
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Towards the generation of fully functioning biomimetic analytical platforms for Water Quality Analysis using ionogel
2011Co-Authors: Monika Czugala, Fernando Benito-lopez, Dermot DiamondAbstract:Increased demand for improved Water management with greatly improved price/performance characteristics is a driving need for Water Quality monitoring systems. Typical Analysis methods are very costly and time consuming, therefore simple, rapid, accurate, cost-effective field-deployable sensors incorporating wireless communication capabilities need to be developed. The main requirements of these sensors such as reproducibility, low cost as well as selectivity and sensitivity must be met for scale-up and mass fabrication allowing for real-time monitoring as well as widespread field deployment. The first use of a wireless paired emitter detector diode (PEDD) as an optical sensor for Water Quality monitoring in a lab-on-a-disc device will be presented (Figure 1a). The microfluidic platform is based on a pH dye/ionogel sensing area (Figure 1b), combined with a low-cost, wireless optical sensor, PEDD, for monitoring the pH and the degree of turbidity of Water samples in real time. So far, environmental Water Quality Analysis has been provided by standard lab-on-a-chip systems, but not by centrifugal disc (CDs) platforms, which offer many advantages. Sensors development is highly related to the generation and control of liquid flow within the micro-channels. Adaptive multifunctional materials are materials whose characteristics can be altered using an external stimulus without physical contact and therefore, can be used for fluid control. Photoswitchable materials posses the obvious advantage that arises from the use of non-contact, non invasive stimuli, such as light. The fabrication, characterisation and performance of novel ionic liquid polymer gels (ionogels) as photo-actuated microvalves incorporated into micro-fluidic manifolds will be presented (Figure 2). The valves are actuated by simply applying localised white light irradiation, meaning that no physical contact between the actuation impulse (light) and the valve structure is required.
Yasushi Kiyoki - One of the best experts on this subject based on the ideXlab platform.
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The rSPA Processes of River Water-Quality Analysis System for Critical Contaminate Detection, Classification Multiple-Water-Quality-parameter Values and Real-time Notification
International journal of engineering and technology, 2016Co-Authors: Chalisa Veesommai, Yasushi KiyokiAbstract:The Water Quality Analysis is one of the most important aspects of designing environmental systems. It is necessary to realize detection and classification processes and systems for Water Quality Analysis. The important direction is to lead to uncomplicated understanding for public utilization. This paper presents the river Sensing Processing Actuation processes (rSPA) for determination and classification of multiple-Water- parameters in Chaophraya river. According to rSPA processes of multiple-Water-Quality-parameters, we find the pollutants of conductivity, salinity and total dissolved solid (TDS), which are accumulated from upstream to downstream. In several spots of the river, we have analyzed Water Quality in a maximum value of pollutants in term of oxidation-reduction potential (ORP). The first range effect of parameter is to express high to very high effects in term of dissolved oxygen, second is to express intermediate to very high effect in term of conductivity, third is to express low to very high effect in term of total dissolved solid, fourth is to express completely safe to very high effect in term of turbidity and the final is to express completely safe for effect in term of salinity.
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River Water-Quality Analysis: “critical contaminate detection”, “classification of multiple-Water-Quality-parameters values” and “real-time notification” by rspa processes
2015 International Electronics Symposium (IES), 2015Co-Authors: Chalisa Veesommai, Yasushi KiyokiAbstract:The Water Quality Analysis is one of the most important aspects in designing environmental systems. It is necessary to realize detection and classification processes and systems for Water Quality Analysis. The important direction is to lead to uncomplicated understanding for public utilization. This paper presents the river Sensing Processing Actuation processes (rSPA) for determination and classification of multiple-Water-parameters in Chao Phraya river. According to rSPA processes of multiple-Water-Quality-parameters, we find the pollutants of conductivity, salinity and total dissolved solid (TDS), which are accumulated from upstream to downstream. In several spots of the river, we have analyzed Water Quality in a maximum value of pollutants in term of oxidation-reduction potential (ORP). The first range effect of parameter is to express high to very high effects in term of dissolved oxygen, second is to express intermediate to very high effect in term of conductivity, third is to express low to very high effect in term of total dissolved solid, fourth is to express completely safe to very high effect in term of turbidity and the final is to express completely safe for effect in term of salinity. This paper shows the feasibility and effectiveness of rSPA processes to detect the critical contaminates points and identifies the effect class of multiple-Water-Quality-parameters.
Fernando Benito-lopez - One of the best experts on this subject based on the ideXlab platform.
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Photo-actuated ionogel microvalves for real-time Water Quality Analysis in a micro-fluidic device
2012Co-Authors: Monika Czugala, Pedro Martinez Ortiz, Andreu Llobera, Dermot Diamond, Fernando Benito-lopezAbstract:In the recent years, advances in micro-fluidic techniques for environmental applications have brought wide opportunities for improving of the capacity to monitor Water Quality. However, the development of fully integrated micro-fluidic devices capable of performing complex functions requires the integration of mico-valve with appropriate performance, since they are essential tools for the control and manipulation of flows in micro-channels.[1] The incorporation of ionic liquids within responsive gel matrices (ionogels) produces hybrid materials with many advantages over conventional materials. Depending on the ionic liquid, ionogels give the possibility of tuning several micro-valve actuation times and so independently control liquid flows within the channels under a common illumination source.[2] The undeniable advantage of these materials arise from the use of non invasive, non-contact stimuli such as light, offering improvements in versatility during manifold fabrication, and control of the actuation mechanism. Here we present an attractive approach for Water Quality Analysis, nitrite determination, based on photo-switchable ionogel actuators wherein the micro-valve opening/closing mechanism is controlled by simply applying localised white light irradiation using optical fibres. The nitrite concentration of Water samples is detected by a highly sensitive, low cost wireless paired emitter detector diode device. [1] M. Czugala et. al., “Materials Science: The Key to Revolutionary Breakthroughs in Micro-fluidic Devices”, Proceedings SPIE 8107, 81070C, (2011); doi:10.1117/12.895330. [2] F. Benito-Lopez et. al., Ionogel-based light-actuated valves for controlling liquid flow in micro-fluidic manifolds, Lab Chip 10, (2010), 195-201
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Novel optical sensing system based on wireless paired emitter detector diode device for lab on a disc Water Quality Analysis
2011Co-Authors: Monika Czugala, Dermot Diamond, Fernando Benito-lopezAbstract:Increased demand for improved Water management is a driving need for Water Quality monitoring systems with greatly improved price/performance characteristics. Typical Analysis methods are very costly and time consuming, therefore simple, rapid, accurate, cost-effective field-deployable sensors incorporating wireless communication capabilities need to be developed [1]. The main requirements of these sensors such as reproducibility, low cost as well as selectivity and sensitivity must be met for scale-up and mass fabrication allowing for real-time monitoring as well as widespread field deployment. The first use of a wireless paired emitter detector diode (PEDD) as an optical sensor for Water Quality monitoring in a lab-on-a-disc device will be presented. The microfluidic platform is based on a pH dye/ionogel sensing area, combined with a low-cost, wireless optical sensor, PEDD, for monitoring the pH and the degree of turbidity of Water samples in real time. So far, environmental Water Quality Analysis has been provided by standard lab-on-a-chip systems [2], but not by centrifugal disc (CDs) platforms, which offer many advantages such as the elimination of large power supplies and external pumps.[3] The PEDD device involves two light emitting diodes (LEDs), placed above and below the sensing area. The resulting system is portable, incorporates wireless communication and is completely sustained via a small lithium polymer battery, Figure 1a. The sensing function is provided by a pH indicator dye, which is immobilized within an ionogel polymer matrix, Figure 1b. We believe that this device will be of special interest in samples with a relatively high level of solid contaminants that could interfere with optical analytical measurements.
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Towards the generation of fully functioning biomimetic analytical platforms for Water Quality Analysis using ionogel
2011Co-Authors: Monika Czugala, Fernando Benito-lopez, Dermot DiamondAbstract:Increased demand for improved Water management with greatly improved price/performance characteristics is a driving need for Water Quality monitoring systems. Typical Analysis methods are very costly and time consuming, therefore simple, rapid, accurate, cost-effective field-deployable sensors incorporating wireless communication capabilities need to be developed. The main requirements of these sensors such as reproducibility, low cost as well as selectivity and sensitivity must be met for scale-up and mass fabrication allowing for real-time monitoring as well as widespread field deployment. The first use of a wireless paired emitter detector diode (PEDD) as an optical sensor for Water Quality monitoring in a lab-on-a-disc device will be presented (Figure 1a). The microfluidic platform is based on a pH dye/ionogel sensing area (Figure 1b), combined with a low-cost, wireless optical sensor, PEDD, for monitoring the pH and the degree of turbidity of Water samples in real time. So far, environmental Water Quality Analysis has been provided by standard lab-on-a-chip systems, but not by centrifugal disc (CDs) platforms, which offer many advantages. Sensors development is highly related to the generation and control of liquid flow within the micro-channels. Adaptive multifunctional materials are materials whose characteristics can be altered using an external stimulus without physical contact and therefore, can be used for fluid control. Photoswitchable materials posses the obvious advantage that arises from the use of non-contact, non invasive stimuli, such as light. The fabrication, characterisation and performance of novel ionic liquid polymer gels (ionogels) as photo-actuated microvalves incorporated into micro-fluidic manifolds will be presented (Figure 2). The valves are actuated by simply applying localised white light irradiation, meaning that no physical contact between the actuation impulse (light) and the valve structure is required.
N. Sreelakshmi - One of the best experts on this subject based on the ideXlab platform.
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Real Time Water Quality Analysis Framework using Monitoring and Prediction Mechanisms
2018 Conference on Information and Communication Technology (CICT), 2018Co-Authors: Shajulin Benedict, Nila Gowtham, Deepak Giri, N. SreelakshmiAbstract:Water Quality Analysis (WQA) is remaining a crucial task for government officials, especially for countries such as India, owing to the emergence of Water related health issues and their causal effects. The Analysis of Water Quality at real time would certainly be helpful to human beings as it would create awareness about the Water Quality during climatic changes (rain conditions). This paper proposes a real time Water Quality analytic framework (WQAF) combining the real-time monitoring and prediction mechanisms. WQAF approach monitors Water Quality parameters at predefined Water Quality monitoring sites; it predicts the Water Quality parameter values using prediction algorithms such as Random Forest (RF) or Linear Regression (LR) when monitoring sites are not accessible; and, it utilizes Google Maps for specifying the Quality of Water at real-time to the user of WQAF. The working model of WQAF approach was experimented at the IoT Cloud research laboratory of IIIT Kottayam. Experimental results revealed the Water Quality of a chosen location in a google map using measurements or predictions.
Chalisa Veesommai - One of the best experts on this subject based on the ideXlab platform.
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The rSPA Processes of River Water-Quality Analysis System for Critical Contaminate Detection, Classification Multiple-Water-Quality-parameter Values and Real-time Notification
International journal of engineering and technology, 2016Co-Authors: Chalisa Veesommai, Yasushi KiyokiAbstract:The Water Quality Analysis is one of the most important aspects of designing environmental systems. It is necessary to realize detection and classification processes and systems for Water Quality Analysis. The important direction is to lead to uncomplicated understanding for public utilization. This paper presents the river Sensing Processing Actuation processes (rSPA) for determination and classification of multiple-Water- parameters in Chaophraya river. According to rSPA processes of multiple-Water-Quality-parameters, we find the pollutants of conductivity, salinity and total dissolved solid (TDS), which are accumulated from upstream to downstream. In several spots of the river, we have analyzed Water Quality in a maximum value of pollutants in term of oxidation-reduction potential (ORP). The first range effect of parameter is to express high to very high effects in term of dissolved oxygen, second is to express intermediate to very high effect in term of conductivity, third is to express low to very high effect in term of total dissolved solid, fourth is to express completely safe to very high effect in term of turbidity and the final is to express completely safe for effect in term of salinity.
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River Water-Quality Analysis: “critical contaminate detection”, “classification of multiple-Water-Quality-parameters values” and “real-time notification” by rspa processes
2015 International Electronics Symposium (IES), 2015Co-Authors: Chalisa Veesommai, Yasushi KiyokiAbstract:The Water Quality Analysis is one of the most important aspects in designing environmental systems. It is necessary to realize detection and classification processes and systems for Water Quality Analysis. The important direction is to lead to uncomplicated understanding for public utilization. This paper presents the river Sensing Processing Actuation processes (rSPA) for determination and classification of multiple-Water-parameters in Chao Phraya river. According to rSPA processes of multiple-Water-Quality-parameters, we find the pollutants of conductivity, salinity and total dissolved solid (TDS), which are accumulated from upstream to downstream. In several spots of the river, we have analyzed Water Quality in a maximum value of pollutants in term of oxidation-reduction potential (ORP). The first range effect of parameter is to express high to very high effects in term of dissolved oxygen, second is to express intermediate to very high effect in term of conductivity, third is to express low to very high effect in term of total dissolved solid, fourth is to express completely safe to very high effect in term of turbidity and the final is to express completely safe for effect in term of salinity. This paper shows the feasibility and effectiveness of rSPA processes to detect the critical contaminates points and identifies the effect class of multiple-Water-Quality-parameters.
