A5072705269- Graphene research and applications
- MXene and MAX Phase Materials
- Advanced Sensor and Energy Harvesting Materials
- Supramolecular Self-Assembly in Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Supercapacitor Materials and Fabrication
- Luminescence and Fluorescent Materials
- Advancements in Battery Materials
- Thermal properties of materials
- Nanopore and Nanochannel Transport Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Conducting polymers and applications
- Hydrogels: synthesis, properties, applications
- Graphene and Nanomaterials Applications
- Supramolecular Chemistry and Complexes
- Advanced Memory and Neural Computing
- Advanced Battery Materials and Technologies
- Electromagnetic wave absorption materials
- Carbon Nanotubes in Composites
- Mechanical and Optical Resonators
- TiO2 Photocatalysis and Solar Cells
- Dielectric materials and actuators
- Crystallography and molecular interactions
- Microplastics and Plastic Pollution
Trinity College Dublin
2014-2024
Advanced Materials and BioEngineering Research
2016-2024
22q11 Ireland
2015-2021
University College Dublin
2021
Abstract Direct printing of functional inks is critical for applications in diverse areas including electrochemical energy storage, smart electronics and healthcare. However, the available printable ink formulations are far from ideal. Either surfactants/additives typically involved or concentration low, which add complexity to manufacturing compromises resolution. Here, we demonstrate two types two-dimensional titanium carbide (Ti 3 C 2 T x ) MXene inks, aqueous organic absence any additive...
Super sensitive, not so silly, putty Many composites blend stiff materials, such as glass or carbon fibers, into a softer elastic polymer matrix to generate material with better overall mechanical toughness. Boland et al. added graphene lightly cross-linked silicone (also known Silly Putty). The resulting composite has unusual properties, allowing the manufacture of strain sensors that can detect respiration and footsteps spiders. Science , this issue p. 1257
Abstract The ever-increasing demands for advanced lithium-ion batteries have greatly stimulated the quest robust electrodes with a high areal capacity. Producing thick from high-performance active material would maximize this parameter. However, above critical thickness, solution-processed films typically encounter electrical/mechanical problems, limiting achievable capacity and rate performance as result. Herein, we show that two-dimensional titanium carbide or carbonitride nanosheets,...
The ongoing miniaturization of devices and development wireless implantable technologies demand electromagnetic interference (EMI)-shielding materials with customizability. Additive manufacturing conductive polymer hydrogels favorable conductivity biocompatibility can offer new opportunities for EMI-shielding applications. However, simultaneously achieving high conductivity, design freedom, shape fidelity in 3D printing is still very challenging. Here, an aqueous Ti3 C2 -MXene-functionalized...
2D material hydrogels have recently sparked tremendous interest owing to their potential in diverse applications. However, research on the emerging MXene is still its infancy. Herein, we show a universal 4D printing technology for manufacturing with customizable geometries, which suits family of MXenes such as Nb2CTx, Ti3C2Tx, and Mo2Ti2C3Tx. The obtained offer 3D porous architectures, large specific surface areas, high electrical conductivities, satisfying mechanical properties....
While it has been demonstrated that large scale liquid exfoliation of graphene is possible using high-shear exfoliation, not yet shown to be applicable a broader range layered materials. In addition, would useful determine whether the mechanisms reported for shear also apply other 2D this work we show previous models describing MoS2 and WS2. However, find minimum rate required exfoliate WS2 ~3 × 104 s−1, somewhat higher than value graphene. We demonstrate scalability By measuring then...
Abstract The ever‐increasing popularity of smart electronics demands advanced Li‐ion batteries capable charging faster and storing more energy, which in turn stimulates the innovation electrode additives. Developing single‐phase conductive networks featuring excellent mechanical strength/integrity coupled with efficient electron transport durability at high‐voltage operation should maximize rate capability energy density, however, this has proven to be quite challenging. Herein, it is shown...
In this work we have used melt-processing to mix liquid-exfoliated boron–nitride nanosheets with PET produce composites for gas barrier applications. Sonication of h-BN powder, followed by centrifugation-based size-selection, was prepare suspensions aspect ratio >1000. The solvent removed give a weakly aggregated powder which could easily be mixed into PET, giving composite containing well-dispersed nanosheets. These showed very good performance oxygen permeability reductions 42% adding just...
We have demonstrated a simple method to pretreat graphite powder resulting in significant reduction the time required produce dispersions of solvent-exfoliated graphene. Sonication either stabilizing solvents such as NMP or nonstabilizing water results breakage flakes and considerable exfoliation give As expected, much graphene produced is stable indefinitely NMP. Surprisingly, however, water-based samples unaggregated was observed up 26 h after sonication with complete sedimentation only...
Displaying a strain-dependent electrical response, the porous graphene-based nanocomposite ‘G-foam’ was found to be an effective pressure sensor and sensitive impact-sensing material.
Abstract The development of new catalysts for oxidation reactions is central importance many industrial processes. Plasmonic catalysis involves photoexcitation templates/chips to drive and enhance target molecules. Raman-based sensing molecules can also be enhanced by these templates. This provides motivation the rational design, characterization, experimental demonstration effective template nanostructures. In this paper, we report on a comprising silver nanoparticles aligned peptide...
In this work two dimensional graphene flakes were used to prepare new electrolytes for dye sensitized solar cells (DSSCs). Small amounts (up 3 wt%) of nanoflakes suspended into the ionic liquid (IL) 1-propyl-3-methyl imidazolium iodide (PMII) produce electrolytes. The use these in DSSCs resulted more than twenty five times improvement cell efficiency. increase efficiency can be attributed primary reasons. Graphene act as an efficient charge transfer agent viscous IL and also a catalyst...
Abstract While nanocomposite electromechanical sensors are expected to display reasonable conductivity and high sensitivity, little consideration is given eliminating hysteresis strain rate/frequency dependence from their response. For example, while G‐putty, a composite of graphene polysiloxane, has very its extreme viscoelasticity renders it completely unsuitable for real due hysteretic rate‐/frequency‐dependent effects. Here shown that G‐putty can be converted an ink printed into...
For a wide range of applications graphene suspensions, thorough understanding their rheological properties is crucial. We probe the microstructure dense suspensions micron-sized, few-layer, defect-free platelets by measuring viscoelastic at various concentrations up to 39 mg ml(-1). propose model relate yield strain mesh size as function volume fraction ϕ. From stress measurements we infer typical bond energy (≈20 kBT) and ϕ dependence number density. These results allow us express steady...
Morpholine-substituted 1,8-naphthalimide fluorophores exhibit solvent and pH-dependent emission characteristics based on aggregation, form robust chemically reversible metallogels.
Previous studies using Deionized (DI) water found that household plastic products used in food preparation and storage are a local immediate source of extremely high quantities microplastics (MPs) released directly into to the human body environment. However, DI is rarely outside laboratories. Here, MP release from exposed ordinary drinking was studied. To facilitate this study, concept Synthetic (SDW) introduced, which involved preparing accordance with WHO standard but modified mimic...
In this study, we integrate plasmonic metal nanomaterials with a piezoelectric polyvinylidene fluoride (PVDF) polymer and lithium niobate (LiNbO3) based composite to form an all-solid-state flexible self-energized sensor. We demonstrate that following the application of load, film enhances surface-enhanced Raman spectroscopy (SERS) signal analyte molecule up 14 times. The β-phase PVDF in is optimized through introduction multi-walled carbon nanotubes post-fabrication UV irradiation...
The broad spectrum of chemical and electronic properties 2D nanomaterials makes them attractive in a wide range applications, especially the context printed electronics. Therefore, understanding rheological nanosheet suspensions is crucial for many additive manufacturing techniques. Here, we study viscoelastic aqueous graphene oxide nanosheets. We show that gel phase, magnitude elastic response its scaling with volume fraction independent lateral size particles interaction strength between...
The low molecular weight gelator (LMWG) 1 based on the tripodal benzene-1,3,5-tricarboxamide (BTA) motif, capped with terpyridine (tpy) units, was shown to form supramolecular gels versatile functionalities such as self-healing, while cross-linking of its fibers d- and f-block metal ions led modified photophysical properties, obtained were additionally capable extrusion.