Dermot Diamond
Dublin City University, NCSR, Department Member
COMMON SENSE is a new project that supports the implementation of European Union marine policies such as the Marine Strategy Framework Directive (MSFD) and the Common Fisheries Policy (CFP). The project, which was launched in November... more
COMMON SENSE is a new project that supports the implementation of European Union marine policies such as the Marine Strategy Framework Directive (MSFD) and the Common Fisheries Policy (CFP). The project, which was launched in November 2013, is funded by the EC Seventh Framework Programme (FP7) and has been designed to directly respond to requests for integrated and effective data acquisition systems by developing innovative sensors that will contribute to our understanding of how the marine environment functions. COMMON SENSE is coordinated by the Leitat Technological Centre, Spain, and its consortium brings together 15 partners from seven different countries, encompassing a wide range of technical expertise and know-how in the marine monitoring area.
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This work presents the ongoing development of a microfluidic chip for a low cost field deployable phosphate analyser for water. The phosphate analyser is a fully integrated system incorporating fluid handling, microfluidic technology,... more
This work presents the ongoing development of a microfluidic chip for a low cost field deployable phosphate analyser for water. The phosphate analyser is a fully integrated system incorporating fluid handling, microfluidic technology, colorimetric chemical detection, and real time ...
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A non-reversible solid-state ammonia sensor based on formation of indophenol blue has been developed. A new optimised reaction conditions found for Berthelot's reaction allow the sensor to respond to dissolved ammonia in ambient... more
A non-reversible solid-state ammonia sensor based on formation of indophenol blue has been developed. A new optimised reaction conditions found for Berthelot's reaction allow the sensor to respond to dissolved ammonia in ambient conditions at a much faster reaction rate ...
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ABSTRACT It is estimated that there are 170 million diabetics worldwide, and the number continues to rise alarmingly. The management of diabetes is therefore critical to future society, and this is driving demand for point-of-care (POC)... more
ABSTRACT It is estimated that there are 170 million diabetics worldwide, and the number continues to rise alarmingly. The management of diabetes is therefore critical to future society, and this is driving demand for point-of-care (POC) glucose biosensors, and they play a central role in the management blood sugar levels in patients with diabetes. Glucose Oxidase (GOx) is a biorecognition enzyme, which recognises the glucose molecule and acts as a catalyst to produce gluconic acid and hydrogen peroxide in the presence of glucose and oxygen.[1] Ionic Liquids are organic salts, which are liquid at ambient temperature. Their non-volatile character and thermal stability makes them an attractive alternative to conventional organic solvents. We are interested in studying the characteristics of GOx in ionic liquids, and in polymer materials incorporating ionic liquids known as ionogels. Herein we report the enzyme activity of GOx in a biosensor fabricated using a novel hybrid ionogel. This approach potentially offers several advantages over conventional materials. For example, the ionogels can be chemically and physically tailored for a particular requirement. [3] The design of these ionogels ensures that the enzyme is effectively retained in the polymer, thus preventing leaching. The ionogel-biosensor has been incorporated into a compact, portable and low cost device, which allows the real time monitoring of enzyme activity of GOx. Based on this model, we project that this device will provide the platform for measuring the enzyme activity of a wide range of enzymes.
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ABSTRACT Ionic Liquids (IL’s) - being organic salts that are liquid at room temperature, display inherent ionic conductivity and a wide electrochemical window. This has led to their inevitable incorporation into electrochemical sensing... more
ABSTRACT Ionic Liquids (IL’s) - being organic salts that are liquid at room temperature, display inherent ionic conductivity and a wide electrochemical window. This has led to their inevitable incorporation into electrochemical sensing techniques1. Radio Frequency (RF) detection provides a technique which can monitor conductivity wirelessly, but also has the required sensitivity and is non-invasive on the sample. We have used the IL trihexyltetradecylphosphonium dicyanamide[P6,6,6,14][DCA] which can easily be incorporated and solidified into a polymeric membrane. The resulting clear, homogenous membrane shows an optical response upon co-ordination to the metal ions Cu2+(yellow)and Co2+ (blue), and both ions simultaneously (green). RF can not only discriminate between the coordinated and noncoordinated membranes, but also between the individual co-ordinated membranes. The resultant downward trend in conductivity has been validated by Electrochemical Impedance Spectroscopy (EIS) and by X-Ray Flourescence (XRF). XRF shows that the results obtained from RF and EIS are directly related to the binding selectivity of the ligand [DCA]-. IL’s can bind to a variety of heavy metal ions and other important target analytes such as CO2.2 If a drop in conductivity can be presumed upon binding to an analyte, then the inherent conductivity properties of IL’s could be exploited in future electrochemical sensing. 1 . D. Wei., Anal. Chim. Acta. 2008, 607, 126-135 2 . E. Bates., J. Am. Chem. Soc,2002
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The concept of “Micro-total-analysis-Systems” or “Lab-on-chip” has emerged over the past 20-years but, despite of the fact their incredible potential to revolutionise analytical science few outputs have reached the market so far [1].... more
The concept of “Micro-total-analysis-Systems” or “Lab-on-chip” has emerged over the past 20-years but, despite of the fact their incredible potential to revolutionise analytical science few outputs have reached the market so far [1]. Moreover, important issues like durability, ...
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Byrne, Robert and Benito-Lopez, Fernando and Diamond, Dermot (2010) Photo-responsive ionogels as functional materials in microfluidic systems. In: Macro2010: 43rd IUPAC World Polymer Congress, 11-16 July 2010, Glasgow, UK. ... DORAS is... more
Byrne, Robert and Benito-Lopez, Fernando and Diamond, Dermot (2010) Photo-responsive ionogels as functional materials in microfluidic systems. In: Macro2010: 43rd IUPAC World Polymer Congress, 11-16 July 2010, Glasgow, UK. ... DORAS is managed by DCU Library and ...
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There is an increasing demand for autonomous sensor devices which can provide reliable data on key water quality parameters at a higher temporal and geographical resolution than is achievable using current approaches to sampling and... more
There is an increasing demand for autonomous sensor devices which can provide reliable data on key water quality parameters at a higher temporal and geographical resolution than is achievable using current approaches to sampling and monitoring. Microfluidic technology, in combination with rapid and on-going developments in the area of wireless communications, has significant potential to address this demand due to a number of advantageous features which allow the development of compact, low-cost and low-powered analytical devices. Here we report on the development of a microfluidic platform for water quality monitoring. This system has been successfully applied to in-situ monitoring of phosphate in environmental and wastewater monitoring applications. We describe a number of the technical and practical issues encountered and addressed during these deployments and summarise the current status of the technology.
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Non linear relationship of ET(30) vs. Ke for ionic liquids studied & Linear relationship of Ea vs. ΔS‡ for thermal relaxation process in all ILs studied
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The capability of 3D printing technologies for direct production of complex 3D structures in a single step has recently attracted an ever increasing interest within the field of microfluidics. Recently, ultrafast lasers have also allowed... more
The capability of 3D printing technologies for direct production of complex 3D structures in a single step has recently attracted an ever increasing interest within the field of microfluidics. Recently, ultrafast lasers have also allowed developing
new methods for production of internal microfluidic channels within the bulk of glass and polymer materials by direct internal 3D laser writing. This review critically summarizes the latest advances in the production of microfluidic 3D structures by using 3D printing technologies and direct internal 3D laser writing fabrication methods. Current applications of these rapid prototyped microfluidic platforms in biology will be also discussed. These include imaging of cells and living organisms, electrochemical detection of viruses and neurotransmitters, and
studies in drug transport and induced-release of adenosine triphosphate from erythrocytes.
new methods for production of internal microfluidic channels within the bulk of glass and polymer materials by direct internal 3D laser writing. This review critically summarizes the latest advances in the production of microfluidic 3D structures by using 3D printing technologies and direct internal 3D laser writing fabrication methods. Current applications of these rapid prototyped microfluidic platforms in biology will be also discussed. These include imaging of cells and living organisms, electrochemical detection of viruses and neurotransmitters, and
studies in drug transport and induced-release of adenosine triphosphate from erythrocytes.