Dermot Diamond

Dermot Diamond
Dublin City University | DCU · INSIGHT Centre for Data Analytics

D.Sc., Ph.D., D.Litt., M.Sc., B.Sc.

About

718
Publications
172,138
Reads
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18,241
Citations
Additional affiliations
November 2021 - October 2027
European Innovation Council
Position
  • Member
Description
  • Speak about the EIC at relevant events and with local, national and European media Provide insights and feedback to support further improvements to the EIC See https://eic.ec.europa.eu/european-innovation-council-eic-ambassadors-2021-2027_en
April 2021 - present
Siemens Healthineers
Position
  • Consulting Projects Manager
Description
  • Assist with troubleshooting, projects management, advice on existing and future diagnostics technologies
June 2020 - present
Frontiers Media SA (Publishing)
Position
  • Editor
Description
  • Field Chief Editor, oversight of six sections; - Chemical sensors - Electrochemical Sensors - Biosensors - Physical Sensors - Lab on a Chip Devices - Sensor Devices See https://www.frontiersin.org/journals/sensors
Education
January 2002 - June 2002
Queen's University Belfast
Field of study
  • Chemical Sensor Networks
October 1983 - June 1987
Queen's University Belfast
Field of study
  • Potentiometric Chemical Sensors
October 1981 - June 1983
Queen's University Belfast
Field of study
  • Instrumental Methods of Analysis

Publications

Publications (718)
Article
Full-text available
A portable sensing platform for the detection of nutrients (PO4 3−, NO2 −, NO3 −) in natural waters has been realized through the use of rapid prototyping techniques, colorimetric chemistries, electronics, and LED-based optical detection. The sensing platform is modular in design incorporating interchangeable optical detection units, with a compone...
Article
Full-text available
Herein, we review aspects of leading-edge research and innovation in materials science that exploit big data and machine learning (ML), two computer science concepts that combine to yield computational intelligence. ML can accelerate the solution of intricate chemical problems and even solve problems that otherwise would not be tractable. However,...
Chapter
Integration of stimuli-responsive materials into microfluidic systems provides a means to locally manipulate flow at the microscale, in a noninvasive manner, while also reducing system complexity. In recent years, several modes of stimulation have been applied, including electrical, magnetic, light and temperature, among others. To achieve remote c...
Chapter
Contamination of water sources world-wide is increasing due to both anthropogenic and naturogenic causes. The ability to correctly monitor and sense levels of key contaminants is a critical step towards the implementation of water quality management strategies designed to reverse this trend and improve water status. Stricter regulatory frameworks a...
Article
Full-text available
In this paper, we describe how to create simple fluidic systems incorporating soft polymer actuator valves, that can provide highly precise control of flow rates in fluidic channels as an example of a 4D-materials based platform. The particular approach we describe employs photoresponsive gels that swell/contract via a light stimulus, enabling flow...
Article
Full-text available
With the advent of direct laser writing (DLW) using two-photon polymerization (TPP) the generation of high resolution three-dimensional (3D) microstructures has increased dramatically. However, the development of stimuli-responsive photoresists to create four-dimensional (4D) microstructures, remains a challenge. Herein, we present a supramolecular...
Cover Page
Front Cover: In article 1900610, Gordon G. Wallace, Larisa Florea, and co‐workers fabricate 3D‐printed, sugar‐sensing hydrogels. When sugar molecules are introduced into the system, the hydrogel in contact with the sugar molecules appears fluorescent.
Article
Full-text available
The SwEatch platform, a wearable sensor for sampling and measuring the concentration of electrolytes in human sweat in real time, has been improved in order to allow the sensing of two analytes. The solid contact ion-sensitive electrodes (ISEs) for the detection of Na⁺ and K⁺ have been developed in two alternative formulations, containing either po...
Article
In this work, a freshness colorimetric sensor has been integrated with pork meat packages. The sensor tracks rising CO2 levels in the package associated with meat spoilage, as CO2 levels increase with bacterial population. The color of the sensor changes depending on the quantity of bacteria present, therefore it can be correlated with the freshnes...
Article
The ability of boronic acids (BAs) to reversibly bind diols, such as sugars, has been widely studied in recent years. In solution, through the incorporation of additional fluorophores, the BA-sugar interaction can be monitored by changes in fluorescence. Ultimately, a practical realization of this technology requires a transition from solution-base...
Article
Full-text available
The fabrication of highly reliable and rugged fluidic chips designed for use in autonomous analyses for nutrient monitoring is described. The chips are based on a two-layer configuration with the fluidic channels produced in one layer using precision micromilling. The second capping layer contains through holes for sample/standard and reagent addit...
Article
A multi-material 3D printed microfluidic reactor with integrated heating is presented, which was applied within a manifold for the colorimetric determination of ammonium in natural waters. Graphene doped polymer was used to provide localised heating when connected to a power source, achieving temperatures of up to 120 °C at 12 V, 0.7 A. An electric...
Article
Full-text available
A new method, a 3D printing technique, in particular, selective laser melting (SLM), has been used to fabricate moulds for the injection moulding of thermoplastic microfluidic chips that are suitable for prototyping and early stage scale-up. The micro metallic patterns are printed on to a pre-finished substrate to form a microstructured mould. The...
Article
The use of phototaxis to move droplets in liquids offers the opportunity to emulate natural processes such as the controlled transport of materials in fluidic environments and to undertake chemistry at specific locations. We have developed a photoactive organic droplet whose movement in aqueous solution is driven by a photoinitiator, as a result of...
Article
Full-text available
The field of biochemical sensing is evolving from the use of bulky apparatuses to the development of miniaturized systems allowing personal sensing and point of care analysis. We report a wearable platform capable of measuring the concentration of multiple electrolytes in sweat (Na+, K+, Cl−). The platform accesses sweat emerging through the skin,...
Preprint
Herein we review aspects of leading-edge research and innovation in chemistry which exploits big data and machine learning (ML), two computer science fields that combine to yield machine intelligence. ML can accelerate the solution of intricate chemical problems and even solve problems that otherwise would not be tractable. But the potential benefi...
Article
This work reports on a low cost microfluidic electronic tongue (e-tongue) made with carbon interdigitated electrodes, printed on paper, and coated with boronic acid-containing hydrogels. Using capacitance measurements, the e-tongue was capable of distinguishing between different types of sugars (e.g. glucose, fructose and sucrose), in addition to d...
Article
Full-text available
A sensing platform for the in situ, real-time analysis of phosphate in natural waters has been realised using a combination of microfluidics, colorimetric reagent chemistries, low-cost LED-based optical detection and wireless communications. Prior to field deployment, the platform was tested over a period of 55 days in the laboratory during which a...
Article
Herein a new class of polymerisable, boronic acid monomers are presented, which are used to generate soft hydrogels capable of accurate determination of saccharide concentration. Through exploitation of the interaction of these cationic boronic acid with an anionic fluorophore, 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt (pyranine), a two...
Conference Paper
Sleep apnea is a condition commonly characterized by frequent breaks in breathing during sleep, resulting degradation in sleep quality. This paper presents results of clinical trials aimed at evaluating the use of a wearable sensor garment for in-home screening of obstructive sleep apnea and hypopnea (OSAS). The garment used in this study included...
Article
J Sep Sci 2018, 41, 3224–3231 DOI: 10.1002/jssc.201800495 The cover picture shows indirect absorbance detection of small inorganic anions in water achieved using deep UV light emitting diodes (LEDs) within a miniaturised, low‐cost capillary ion chromatography (IC) system. The developed capillary IC system, was assembled on a small footprint modular...
Article
In article number 1801821, David L. Officer and co‐workers break new ground in fluidic chemical transport by guiding organic droplets containing a photoisomerisable material through water with precision and control using light. The droplets can not only be remotely moved from one point to another in a container, but can also be guided to pick up ca...
Article
Full-text available
Soft, stimulus-responsive 3D structures created from crosslinked poly(ionic liquid)s (PILs) have been fabricated at unprecedented sub-micron resolution by direct laser writing (DLW). These structures absorb considerable quantities of solvent (e.g., water, alcohol, and acetone) to produce PIL hydrogels that exhibit stimulus-responsive behavior. Due...
Article
Implementation of wearable sweat sensors for continuous measurement of fluid based biomarkers (including electrolytes, metabolites and proteins) is an attractive alternative to common, yet intrusive and invasive, practices such as urine or blood analysis. Recent years have witnessed several key demonstrations of sweat based electrochemical sensing...
Article
The emulation of the complex cellular and bacterial vesicles used to transport materials through fluids has the potential to add revolutionary capabilities to fluidic platforms. Although a number of artificial motile vesicles or microdroplets have been demonstrated previously, control over their movement in liquid in 3D has not been achieved. Here...
Article
A miniaturised, flexible and low‐cost capillary ion chromatography system has been developed for anion analysis in water. The ion chromatography has an open platform, modular design and allows for ease of modification. The assembled platform weighs ca. 0.6 kg and is 25 × 25 cm in size. Isocratic separation of common anions (F–, Cl–, NO2–, Br– and N...
Article
Paper microfluidics technology requires effective handling and control of fluids, and this remains as a significant obstacle for their accessibility by end-users, inhibiting their transition from the laboratory into the market. Here, the synthesis, characterisation and performance as negative passive pumps of cholinium based poly(ionic liquid) hydr...
Article
Full-text available
Micro-capillaries, capable of light-regulated binding and qualitative detection of divalent metal ions in continuous flow, have been realised through functionalisation with spiropyran photochromic brush-type coatings. Upon irradiation with UV light, the coating switches from the passive non-binding spiropyran form to the active merocyanine form, wh...
Article
A fully integrated and wearable platform for harvesting and analysing sweat sodium concentration in real‐time during exercise has been developed and tested. The platform was largely produced using 3D printing which greatly simplifies fabrication and operation compared to previous versions generated with traditional production techniques. The 3D pri...
Article
Herein, we present the synthesis of linear photochromic norbornene polymers bearing spiropyran side groups (poly(SP-R)), and their assembly into LbL films on glass substrates when converted to the poly(MC-R) under UV irradiation. The LbL films were composed of bilayers of poly(allylamine hydrochloride) (PAH) and poly(MC-R), forming (PAH/poly(MC-R))...
Article
The article presents pioneering research of textile chemiresistors on Evolon and Polyester substrates equipped with graphite electrodes and in-situ polymerized poly(tetrabutylphosphonium 3-sulfopropylacrylate) or poly(tributylhexylphosphonium 3-sulfopropylacrylate) sensitive layers. The DC- and AC- responses to 10 ppm of methanol, nitrogen dioxide,...
Article
While the microfluidic device itself may be small, often the equipment required to control fluidics in the chip unit is large e.g. pumps, valves and mixing units, which can severely limit practical use and functional scalability. In addition, components associated with fluidic control of the device, more specifically the valves and pumps, contribut...
Article
In this work, we present a new system for the determination of dissolved carbon dioxide (from 7.2 ppm to 425.6 ppm) in aqueous environments. Microfluidic technology has been incorporated in sensor design to reduce the volume of samples and reagents. Moreover, a detection system has been integrated in the chip, consisting of a white light-emitting d...
Chapter
Integration of stimuli-responsive materials into microfluidic systems provides a means to locally manipulate flow at the microscale, in a noninvasive manner, while also reducing system complexity. In recent years, several modes of stimulation have been applied, including electrical, magnetic, light and temperature, among others. To achieve remote c...
Article
Full-text available
Controlled movement in fluids is essential to the function of living systems. The desire of [...]
Article
Full-text available
The measurement of sweat electrolytes has a number of important applications including monitoring the performance of athletes [1] and providing information on medical conditions such as cystic fibrosis [2]. [...]
Article
This paper describes the design, fabrication and performance of a reusable ionogel-based photo-actuator, in-situ photopolymerised into a lab-on-a-disc microfluidic device, for flow control. The ionogel provides an effective barrier to liquids during storage of reagents and spinning of the disc. A simple LED (white light) triggers actuation of the i...
Chapter
Ionic liquids provide ion-rich media, which can control the system properties based on the size, charge, and shape of the ions. Owing to the versatility in their architecture, they can offer rare opportunities for designing smart materials which respond to external signals for specific applications. Polymerizing the ionic liquids can subtly arrange...
Article
Full-text available
This review highlights recent advances towards non-invasive and continuous glucose monitoring devices, with a particular focus placed on monitoring glucose concentrations in alternative physiological fluids to blood.
Article
Medical diagnosis often depends on the retrieval of a blood sample, which is an intrusive process involving physical trauma and often poses the risk of infection. This has led to the development of non-invasive alternatives often targeting biofluids such as saliva, sweat and tears as readily available sources of relevant biomarkers. Sweat is of par...
Article
Full-text available
A new water-based sensor for carbon dioxide containing an ionic liquid is presented. The sensor is based on the acidity of the CO2 molecule. The sensor incorporates an ionic liquid in the matrix, which enhances CO2 solubility, and minimising the response and recovery times of the sensor. The entire concentration range (0-100%) of CO2 in water has b...
Article
A novel approach that allows control of flow in microfluidic channels with unsurpassed performance using light is described. Valve structures have been created using photoresponsive hydrogels based on spiropyran-functionalised pNIPAAm hydrogels photopolymerised around pillar structures within the channels. Valve actuation is controlled from outside...
Article
Herein we report on the synthesis of a bipedal hydrogel walker, based on N-isopropylacrylamide-co-acrylated spiropyran-co-acrylic acid p(NIPAAm-co-SP-co-AA). Due to the presence of the photochromic spiropyran molecule in the polymer structure, these hydrogels reversibly shrink and swell in aqueous environments when exposed to different light condit...
Article
Herein we present a novel sensor for the detection of monosaccharides (e.g. glucose, fructose) in solution, using electrical impedance spectroscopy. The sensor is based on carbon interdigitated electrodes, printed on paper using screen printing. The surface of the electrodes was modified with a thin layer of hydrogel containing acrylamide copolymer...
Article
In this study we report the synthesis, characterisation and performance of thermo-responsive crosslinked tributylhexyl phosphonium sulfopropylacrylate (PSPA) poly(ionic liquid) (PILc) hydrogels as temperature controlled actuators in microfluidic devices. The hydrogel size is modulated by localised changes in its temperature due to the lower critica...
Article
To our knowledge, this work describes the first example of electro-guided, self-propelled droplets composed solely of an ionic liquid (IL), namely trihexyl(tetradecyl)phosphonium chloride ([P6,6,6,14][Cl]). These self-propelled droplets travel along an aqueous-air boundary to desired destinations within the fluidic network. Electrotactic movement o...
Article
A method using zinc powder in conjunction with the common Griess assay was developed for the detection of nitrate in water. This method is applicable to portable water test kits and allows for the accurate determination of nitrate in freshwater. The linear range for the method was shown to be 0.5-45 mg L⁻¹ NO3⁻ and the limit of detection (LOD) was...
Article
A method for microfluidic flow control based upon polymer hydrogel valves with rapid and reversible actuation properties is described. The platform allows for contactless optical flow control based upon pulsing light, resulting in a forced oscillating and control over the valve through photo-isomerisation of a spiropyran derivative, co-polymerised...
Chapter
The importance of developing deeper understanding of the principles controlling the characteristics of materials is highlighted in terms of enabling these to be optimized in a systematic manner, and to realize the tremendous potential of the rapidly expanding base materials under investigation. The exciting impact of improved techniques for charact...
Chapter
Smart fabrics and interactive textiles are a relatively new area of research, with many potential applications in the field of biomedical engineering. Sensors integrated into textiles in contact with the body have the ability to capture many useful physiological signals. This chapter discusses some of the signals that can be measured using smart te...
Technical Report
EXECUTIVE SUMMARY The COMMON SENSE project has been designed and planned in order to meet the general and specific scientific and technical objectives mentioned in its Description of Work (page 77). As the overall strategy, the 11 work packages (WPs) of the work plan were grouped into 3 key phases: (1) RD basis for cost-effective sensor developmen...
Conference Paper
In this paper we present a novel dissolvable film (DF) based valving architecture for use on the centrifugal microfluidic platform. We seal fluidic reservoirs on a disc substrate with a series of these valves such that, by pulsing the spin rate, the next valve in the series is opened. Thus centrifugal flow control advances from 'analogue' scheme, w...
Conference Paper
Here we investigate the feasibility of textile based piezoresistive sensors to accurately measure increases in spinal extension, on-body for clinical application in the Modified Modified Schober's test. The proposed sensor combines the accuracy of standard metallic strain sensors with the comfort and usability of textiles, offering innumerable wear...
Article
A non-toxic solid-phase test reagent for rapid determination of nitrite and nitrate was developed. Powdered reagent utilised azo- and diazo-components (p-nitroaniline and chromotropic acid, respectively), solid organic acid acidifier (malonic, maleic or oxalic acid), zinc dust (for nitrate determination), catalyst and masking agent. Effects of soli...
Article
Photo-actuator hydrogels were generated using a N-isopropylacrylamide-co-acrylated spiropyran-co-acrylic acid (p(NIPAAm-co-SP-co-AA)) copolymer, in 100-1-5 mole ratio. Different ratios of deionised water: organic solvent (tetrahydrofuran, dioxane and acetone) were used as the polymerisation solvent. By changing the polymerisation solvent, the pore...
Article
Full-text available
The ability to track the dynamics of processes in natural water bodies on a global scale, and at a resolution that enables highly localised behaviour to be visualized, is an ideal scenario for understanding how local events can influence the global environment. While advances in in-situ chem/bio-sensing continue to be reported, costs and reliabilit...
Article
We introduce a novel instrument controlled valving scheme for centrifugal platforms which is based upon xurography. In a first approach, which is akin to previously presented event-triggered flow control, the valves are composed of a pneumatic chamber sealed by a dissolvable film (DF) and by a pierceable membrane. Liquid is initially prevented from...
Article
A platform for harvesting and analysing the sodium content of sweat in real time is presented. One is a ‘watch’ format in which the sampling and fluidic system, electrodes, circuitry and battery are arranged vertically, while in the other ‘pod’ format, the electronics and battery components, and the fluidics electrodes are arranged horizontally. Th...
Article
Microfluidic devices are poised to dramatically influence the future of the process industry. Therefore the understanding and proper evaluation of the flow and mixing behaviour at microscale becomes a very important issue. In this study, the diffusion behaviour of two reacting solutions of HCl and NaOH were directly observed in a glass/polydimethyl...