A5087623980- Advanced Sensor and Energy Harvesting Materials
- Graphene research and applications
- Conducting polymers and applications
- 2D Materials and Applications
- Anodic Oxide Films and Nanostructures
- Nanopore and Nanochannel Transport Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanomaterials and Printing Technologies
- Advanced Memory and Neural Computing
- Supercapacitor Materials and Fabrication
- Molecular Junctions and Nanostructures
- Digital Image Processing Techniques
- Perovskite Materials and Applications
- Advanced Image Processing Techniques
- Medical Imaging Techniques and Applications
- Smart Materials for Construction
- Carbon Nanotubes in Composites
- Ion-surface interactions and analysis
- Planetary Science and Exploration
- Nanowire Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Nanofabrication and Lithography Techniques
- Medical Image Segmentation Techniques
- ZnO doping and properties
- Microfluidic and Bio-sensing Technologies
Trinity College Dublin
2022-2025
Advanced Materials and BioEngineering Research
2023-2025
Abstract Networks of solution-processed nanomaterials are becoming increasingly important across applications in electronics, sensing and energy storage/generation. Although the physical properties these devices often completely dominated by network morphology, structure itself remains difficult to interrogate. Here, we utilise focused ion beam – scanning electron microscopy nanotomography (FIB-SEM-NT) quantitatively characterise morphology printed nanostructured networks their using...
Abstract Networks of nanowires, nanotubes, and nanosheets are important for many applications in printed electronics. However, the network conductivity mobility usually limited by resistance between particles, often referred to as junction resistance. Minimising has proven be challenging, partly because it is difficult measure. Here, we develop a simple model electrical conduction networks 1D or 2D nanomaterials that allows us extract nanoparticle resistances from particle-size-dependent DC...
Printed networks of nanoparticles (e.g., nanodots, nanowires, nanosheets) are important for a range electronic, sensing and energy storage applications. Characterizing the temperature dependence both nanoparticle resistivity (ρNW) interparticle junction resistance (R J) in such is crucial understanding conduction mechanism so optimizing network properties. However, it challenging to extract ρNW R J from standard electrical measurements. Here, using silver nanowires (AgNWs) as model system,...
Thin films fabricated from solution-processed graphene nanosheets are of considerable technological interest for a wide variety applications, such as transparent conductors, supercapacitors, and memristors. However, very thin printed tend to have low conductivity compared thicker ones. In this work, we demonstrate simple layer-by-layer deposition method which yields highly-aligned, electrochemically-exfoliated roughness nanometer-scale thickness control. By optimising the parameters, with...
Abstract Wearable devices have generally been rigid due to their reliance on silicon‐based technologies, while future wearables will utilize flexible components for example transistors within microprocessors manage data. Two‐dimensional (2D) semiconducting flakes yet be investigated in fiber but can offer a route toward high‐mobility, biocompatible, and fiber‐based devices. Here, the electrochemical exfoliation of 2D tungsten diselenide (WSe 2 ) molybdenum disulfide (MoS is shown achieve...
Solution-processed vertical metal–semiconductor-metal devices are fabricated with liquid-exfoliated tungsten disulfide nanosheets, which exhibit bulk- or electrode-limited behaviors depending on the details of top electrode.
Transparent conductors (TCs) represent key components in many applications from optoelectronic devices to electromagnetic shielding. While commercial typically use thin films of indium tin oxide, this material is brittle and increasingly scarce, meaning higher performing cheaper alternatives are sought after. Solution-processible metals would be ideal owing their high conductivities printability. However, due opacity visible light, such need very achieve transparency, thus limiting the...
Abstract Networks of solution-processed nanomaterials are becoming increasingly important across applications in electronics, sensing and energy storage/generation. Although the physical properties these devices often completely dominated by network morphology, structure itself remains difficult to interrogate. Here, we utilise FIB-SEM nanotomography quantitatively characterise morphology nanostructured networks their using nanometre-resolution 3D images. The influence nanosheet/nanowire...
Abstract Thin film networks of solution processed nanosheets show remarkable promise for use in a broad range applications including strain sensors, energy storage, printed devices, textile electronics, and more. While it is known that their electronic properties rely heavily on morphology, little mechanical nature, glaring omission given the effect deformation has morphology porous systems post processing tailored properties. Here, this work employs recent advance thin testing called Layer...
Abstract Solution‐processed photodetectors incorporating liquid‐phase‐exfoliated transition metal dichalcogenide nanosheets are widely reported. However, previous studies mainly focus on the fabrication of photoconductors, rather than photodiodes which tend to be based heterojunctions and harder fabricate. Especially, there rare reports introducing commonly used transport layers into nanosheet networks. In this study, a reliable solution‐processing method is reported fabricate heterojunction...
Abstract Constructing a semi‐permanent base on the moon or Mars will require maximal use of materials found in situ and minimization equipment transported from Earth. This mean heavy reliance regolith (Lunar Marian soil) water, supplemented by small quantities additives fabricated Here it is shown that SiO 2 ‐based powders, as well Lunar Martian simulants, can be into building at near‐ambient temperatures using only few weight‐percent carbon nanotubes binder. These composites have...
Many printed electronic applications require strain-independent electrical properties to ensure deformation-independent performance. Thus, developing printed, flexible devices using 2D and other nanomaterials will an understanding of the effect strain on nano-networks. Here we introduce novel AC techniques fully characterise resistance high mobility networks, fabricated from electrochemically exfoliated MoS2 nanosheets. These were initially characterised DC piezoresistance measurements...
Abstract Many printed electronic applications require strain‐independent electrical properties to ensure deformation‐independent performance. Thus, developing printed, flexible devices using 2D and other nanomaterials will an understanding of the effect strain on nano‐networks. Here, novel AC techniques are introduced fully characterize resistance high‐mobility networks, fabricated from electrochemically exfoliated MoS 2 nanosheets. These initially characterized DC piezoresistance...
Networks of solution-processed nanomaterials are important for multiple applications in electronics, sensing and energy storage/generation. While it is known that network morphology plays a dominant role determining the physical properties printed networks, remains difficult to quantify structure. Here, we utilise FIB-SEM nanotomography characterise nanostructured networks. Nanometer-resolution 3D-images were obtained from networks graphene nanosheets various sizes, as well WS2 nanosheets,...
In recent years, the rising demand for close interaction with electronic devices has led to a surge in popularity of wearable gadgets. While gadgets have generally been rigid due their utilisation silicon-based technologies, flexible semiconducting fibre-based transistors will be needed future wearables as active sensing components or within microprocessors manage and analyse data. Two-dimensional (2D) flakes are yet investigated fibre but could offer route toward high-mobility,...
Networks of nanowires and nanosheets are important for many applications in printed electronics. However, the network conductivity mobility usually limited by inter-particle junction resistance, a property that is challenging to minimise because it difficult measure. Here, we develop simple model conduction networks 1D or 2D nanomaterials, which allows us extract nanoparticle resistances from particle-size-dependent D.C. resistivity data conducting semiconducting materials. We find porous...