A5069658240- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Calcium Carbonate Crystallization and Inhibition
- Bone Tissue Engineering Materials
- Paleontology and Stratigraphy of Fossils
- Magnetism in coordination complexes
- Silk-based biomaterials and applications
- Crystal structures of chemical compounds
- Supramolecular Self-Assembly in Materials
- Crystallography and molecular interactions
- Lanthanide and Transition Metal Complexes
- Algal biology and biofuel production
- Pickering emulsions and particle stabilization
- Fluoride Effects and Removal
- Metal complexes synthesis and properties
- Microbial Applications in Construction Materials
- Parathyroid Disorders and Treatments
- Marine Sponges and Natural Products
- Copper-based nanomaterials and applications
- Nanocluster Synthesis and Applications
- Facial Trauma and Fracture Management
- Iron oxide chemistry and applications
- Academic Writing and Publishing
- Innovative Teaching and Learning Methods
- Polymer Surface Interaction Studies
University of Leeds
2016-2024
University of Edinburgh
2017-2021
JEOL (United Kingdom)
2021
Trinity College Dublin
2011-2017
22q11 Ireland
2013-2017
University College Dublin
2013-2017
Silver diamine fluoride (SDF) is found to promote remineralization and harden the carious lesion. Hydroxyapatite crystallization a crucial process in remineralization; however, role of SDF crystal formation unknown. We designed an vitro experiment with calcium phosphate different concentrations (0.38, 1.52, 2.66, 3.80 mg/mL) investigate effect this additive on nucleation growth apatite crystals. Two control groups were also prepared-calcium (CaCl
Early-stage reaction mechanisms for aragonite-promoting systems are relatively unknown compared to the more thermodynamically stable calcium carbonate polymorph, calcite. Using cryoTEM and SEM, early stages taking place during aragonite formation were identified in a highly supersaturated solution using an alcohol-water solvent, overall particle attachment growth mechanism was described system. In vitro evidence is provided solid-state transformation of amorphous aragonite, demonstrating...
Abstract From biomineralization to synthesis, organic additives provide an effective means of controlling crystallization processes. There is growing evidence that these are often occluded within the crystal lattice. This promises elegant creating nanocomposites and tuning physical properties. Here we use incorporation sulfonated fluorescent dyes gain new understanding additive occlusion in calcite (CaCO 3 ), link morphological changes mechanisms. We demonstrate incorporated specific zones,...
Biomineralisation processes invariably occur in the presence of multiple organic additives, which act combination to give exceptional control over structures and properties. However, few synthetic studies have investigated cooperative effects soluble additives. This work addresses this challenge focuses on combined amino acids coloured dye molecules. The experiments demonstrate that strongly calcite crystals only form Brilliant Blue R (BBR) four seventeen acids, as compared with almost...
The dimensions of hybrid vanadate capsules can be controlled through organophosphonate ligands. solution-stability allows their deposition on the Au(111) surface giving rise to densely packed 2D assemblies.
A novel hexanuclear {Mn6} coordination complex with octahedral topology has been prepared and was subsequently used as a building unit for the construction of polymers metal–organic gels; latter exhibit thixotropic behavior reversible sol–gel phase transitions.
Abstract Coccolith‐associated polysaccharides (CAPs) are thought to be a key part of the biomineralization process in coccolithophores; however, their role is not fully understood. Two different systems that promote polymorphs calcium carbonate used show effect CAPs on nucleation and polymorph selection vitro. Using combination time‐resolved cryo‐transmission electron microscopy scanning microscopy, mechanisms calcite growth presence intracrystalline fraction examined containing extracted...
Chitin is one of the most studied biopolymers but understanding how it assembles from molecules to microfibers still limited. Organisms are able assemble chitin with precise control over polymorphism, texture, and final morphology. The produced hierarchical structure leads materials outstanding mechanical properties. In this study, self-assembly in aqueous solutions β-chitin nanofibrils, as far possible similar their native state, investigated. These nanofibrils increase tendency...
Abstract Background To perform a detailed morphological analysis of the inorganic portion two different clinical presentations calcium-based deposits retrieved from subjects with SSc and identify chemical dissolution these suitable for use. Methods Chemical using Fourier Transform IR spectroscopy (‘FTIR’), Raman microscopy, Powder X-Ray Diffraction (‘PXRD’), Transmission Electron Microscopy (‘TEM’) was undertaken distinct types calcinosis deposits: paste stone. Calcinosis sample titration...
Metal ions are frequently incorporated into crystalline materials to improve their electrochemical properties and confer new physicochemical properties. Naturally-occurring phosphate apatite, which is formed geologically in biomineralization processes, has extensive potential applications therefore an attractive functional material. In this study, we generate a novel building block for flexible optoelectronics using bio-inspired methods deposit layer of photoactive titanium-modified...
Collagen type I is one of the major structural proteins in mammals, providing tissues such as cornea, tendon, bone, skin, and dentin with mechanical stability, strength, toughness. fibrils are composed collagen molecules arranged a quarter-stagger array that gives rise to periodicity 67 nm along fibril axis, 30 overlap zone 37 gap zone. The formation highly organized self-assembly process where electrostatic hydrophobic interactions play critical role determining staggering periodicity....
Since 2002, a multidisciplinary program has been used to encourage science students build on their chemical knowledge and appreciate how it applies the world around them. The is interactive instills new set of core learning skills that are often underrepresented in undergraduate curricula, namely, cooperative learning, communication presentation skills, resource mining. second-year cohort 220 divided into small groups. Each group proposes topic through which explore societal role played by...
We present herein a novel method to prepare free-standing Dried Foam Films (DFFs) whereby individual polynuclear manganese complexes cover quantitatively the holes of micro-grids; fabricated, homogeneous films have cross-sectional thickness only ca. 5 nm and are characterised by high mechanical stability.
Abstract Early‐stage reaction mechanisms for aragonite‐promoting systems are relatively unknown compared to the more thermodynamically stable calcium carbonate polymorph, calcite. Using cryoTEM and SEM, early stages taking place during aragonite formation were identified in a highly supersaturated solution using an alcohol–water solvent, overall particle attachment growth mechanism was described system. In vitro evidence is provided solid‐state transformation of amorphous aragonite,...
Organic additives play key roles in controlling the precipitation of calcium carbonate environment, industry, and biology, where they can direct polymorphism, alter crystal morphologies, sometimes even become occluded, modifying bulk properties. However, significant questions remain regarding pathway from adsorption on surfaces to occlusion. Here, optical properties calcite crystals grown presence dye Congo red are used characterize organization within crystal. Complemented by analysis...
A bio-inspired synthetic approach to Ca(<sc>ii</sc>)-based coordination assemblies is reported; the supramolecular system was used as habit modifier for CaCO<sub>3</sub> materials.
Abstract Biomineralisation processes invariably occur in the presence of multiple organic additives, which act combination to give exceptional control over structures and properties. However, few synthetic studies have investigated cooperative effects soluble additives. This work addresses this challenge focuses on combined amino acids coloured dye molecules. The experiments demonstrate that strongly calcite crystals only form Brilliant Blue R (BBR) four seventeen acids, as compared with...
Incorporating additives within host single crystals is an effective strategy for producing composite materials with tunable mechanical, magnetic and optical properties. The type of guest that can be occluded limited, however, as incorporation a complex process depending on many factors including binding the additive to crystal surface, rate growth stability in crystallisation solution. In particular, size guests has been restricted few angstroms - molecules hundred nanometers polymer...
The title mol-ecule, C(16)H(19)NO(2), consists of an indane moiety, which is connected through N atom to acetamide group and a cyclo-pentane ring. adopts planar triangular geometry. Inter-molecular inter-actions, such as π-π stacking or hydrogen bonding, were not observed.
The title compound, [CuCl(2)(C(18)H(18)N(8))]·2CH(3)OH·H(2)O, contains a penta-coordinated Cu(II) atom bonded to the tridentate 4,6-bis-[(E)-1-methyl-2-(pyridin-2-yl-methyl-idene)hydrazin-yl]pyrimidine ligand and two Cl atoms. geometry around is distorted square-pyramidal. mol-ecules pack in crystal structure via O-H⋯Cl, O-H⋯N, C-H⋯Cl C-H⋯O hydrogen bonds, C-H⋯π π-π inter-actions [centroid-centroid distances of pyrimidine-pyridine pyridine-pyridine are 3.750 (3) 3.850 Å, respectively],...
In the title compound, [MnCl(2)(C(18)H(18)N(8))], geometry around Mn(II) centre is distorted square-pyramidal. crystal structure, mol-ecules pack via weak C-H⋯N and C-H⋯Cl inter-actions.