A5031986176- Block Copolymer Self-Assembly
- Polymer Surface Interaction Studies
- Advanced Polymer Synthesis and Characterization
- 2D Materials and Applications
- Perovskite Materials and Applications
- Semiconductor materials and devices
- MXene and MAX Phase Materials
- ZnO doping and properties
- Optical Coatings and Gratings
- Nanocomposite Films for Food Packaging
- Polymer Foaming and Composites
- Proteins in Food Systems
- Chalcogenide Semiconductor Thin Films
- Rheology and Fluid Dynamics Studies
- Anodic Oxide Films and Nanostructures
- Modular Robots and Swarm Intelligence
- Advancements in Photolithography Techniques
- Organic Electronics and Photovoltaics
- Carbon dioxide utilization in catalysis
- Fuel Cells and Related Materials
- Copper-based nanomaterials and applications
- biodegradable polymer synthesis and properties
- Ga2O3 and related materials
- Liquid Crystal Research Advancements
- Surface Roughness and Optical Measurements
University College Cork
2011-2021
Trinity College Dublin
2016-2020
Advanced Materials and BioEngineering Research
2016-2020
University of Chemistry and Technology, Prague
2020
National University of Ireland
2015
Since the isolation of two-dimensional (2D) phosphorene, black phosphorus (BP) has gained popularity due to its high carrier mobility and tunable bandgap. Poor ambient stability BP remains a key issue impedes use in electronic applications. Here we report new stabilization strategy based on covalent functionalization liquid exfoliated few-layer using aryl iodonium salts. Arylation salts enables modification without inducing oxidation alters degradation chemistry by inhibiting bridged oxygen...
PURPOSE Patients with biochemically recurrent prostate cancer (BRPC) after radical prostatectomy and a short PSA doubling time are at risk for distant metastases. Apalutamide, an androgen receptor antagonist, abiraterone acetate plus prednisone (AAP) prolong survival in the metastatic setting. We evaluated whether intensification of androgen-deprivation therapy (ADT) improves outcomes BRPC. PATIENTS AND METHODS PRESTO is randomized phase III, open-label trial patients BRPC ≤9 months...
Nanostructured surfaces are common in nature and exhibit properties such as antireflectivity (moth eyes), self-cleaning (lotus leaf), iridescent colors (butterfly wings), water harvesting (desert beetles). We now understand can mimic some of these natural structures the laboratory. However, synthetic limited since they not easily mass produced over large areas due to scalability current technologies UV-lithography, high cost infrastructure, difficulty nonplanar surfaces. Here, we report a...
We studied the kinetics of nanopattern evolution in (polystyrene-b-polyethylene oxide) diblock copolymer thin films. Using scanning force microscopy, a highly unexpected cylindrical flipping morphology from normal to parallel film plane was detected during solvent annealing (with average thickness 30 nm) at high vapor pressure. an situ time-resolved light scattering device combined with environmental cell enabled us obtain kinetic information different pressures. The data indicated that...
Black phosphorus (BP) is emerging as a promising candidate for electronic, optical, and energy storage applications. However, its poor ambient stability remains critical challenge. Evaluation of few-layer liquid-exfoliated BP during exposure using X-ray photoelectron spectroscopy attenuated total reflectance Fourier transform infrared allows surface chemistry to be investigated. Oxidation initially occurs through nonbridging oxide species, which convert bridging species after exposure. We...
A series of novel block copolymers, processable from single organic solvents and subsequently rendered amphiphilic by thermolysis, have been synthesized using Grignard metathesis (GRIM) reversible addition–fragmentation chain transfer (RAFT) polymerizations azide–alkyne click chemistry. This chemistry is simple allows the fabrication well-defined copolymers with controllable lengths. The designed for use as interfacial adhesive layers in photovoltaics to enhance contact between photoactive...
Engineered two-dimensional (2D) layered materials possess unique physical properties with the potential to improve performance and endurance of future electronic energy devices. Here, we report growth complex 2D nanonetworks crystalline tin selenide (SnSe) via liquid injection chemical vapor deposition using a single-source diselenoether precursor. Potential applications SnSe span wide range technological areas, particularly in The synthesized networks were composed high surface area...
Abstract Solution processed metal oxide thin films are important for modern optoelectronic devices ranging from film transistors to photovoltaics and functional optical coatings. techniques such as dip-coating, allow be rapidly deposited over a large range of surfaces including curved, flexible or plastic substrates without extensive processing comparative vapour physical deposition methods. To increase the effectiveness versatility dip-coated films, alterations commonly used precursors can...
With advances in nanolithography and dry etching, top-down methods of nanostructuring have become a widely used tool for improving the efficiency optoelectronics. These nano dimensions can offer various benefits to device performance terms light extraction efficiency, but often at expense emission color quality. Broadening target peak unwanted yellow luminescence are characteristic defect-related effects due ion beam etching damage, particularly III–N based materials. In this article we...
Abstract Creating perpendicular alignment in lamellar block copolymer (BCP) systems has considerable industrial and commercial significance, most importantly for generating nanowire structures electronic devices. In general, these require careful interface engineering to obtain vertical orientation of the blocks. To avoid strong preferential adsorption one either substrate or polymer/air interface, surface must be “neutralized” by chemical brushes external forces, example, solvent fields....
Dry plasma etching for the pattern transfer of mask features is fundamental to semiconductor processing and development device electrically conducting elements becomes more challenging as reach deep nanoscale regime. In this work, high resolution transmission electron microscopy (TEM) coupled with energy dispersive x-ray (EDX) characterization were used analyze graphoepitaxially aligned block copolymer (BCP) germanium (Ge) substrates a function time. The BCP patterns converted into metal...
Atomic and molecular level interactions in solutions dictate the structural functional attributes of crystals. These features clearly properties materials their applicability technologies. However, microscopic phenomena particle formation-nucleation growth-in real systems are still not fully understood. Specifically, crystallisation occurring closed largely unproven. Combining coherent experimental data, we here demonstrate a fundamental nucleation-growth mechanism that occurs model zinc...
Abstract Black phosphorus (BP) has extraordinary properties, but its ambient instability remains a critical challenge. Functionalization been employed to overcome the sensitivity of BP conditions while preserving properties. Herein, simultaneous exfoliation–functionalization process is reported that functionalizes flakes during exfoliation and thus provides increased protection, which can be attributed minimal exposure oxygen water. A tetrabutylammonium salt was for intercalation BP,...
Nanopatterns can readily be formed by annealing block copolymers (BCPs) in organic solvents at moderate or high temperatures. However, this approach challenging from an environmental and industrial point of view. Herein, we describe a simple environmentally friendly alternative to achieve periodically ordered nanoscale phase separated BCP structures. Asymmetric polystyrene-b-poly(ethylene oxide) (PS-b-PEO) thin film patterns different molecular weight were achieved supercritical carbon...
We studied the kinetics of swelling in high-χ lamellar-forming poly(styrene)-block- poly(lactic acid) (PS-b-PLA) block copolymer (BCP) by varying heating rate and monitoring solvent vapour pressure substrate temperature situ during solvo-thermal annealing (STVA) an oven, analysing resulting morphology. Our results demonstrate that there is not only a threshold (120 kPa), but also reaching this has significant effect on microphase separation morphologies. To study effect, identical films were...
The extensive benefits of the new generation nanostructured surfaces is very promising for enhancing light absorption efficiency in photonic devices. However, low throughput and high cost available technologies such as lithography fabrication nanostructures has proved to be a difficult technological hurdle advanced manufacturing. In this research we present solution based process on molecular weight block copolymer (BCP) nanolithography periodic structures large areas optical surfaces. Block...