A5054172290- Diatoms and Algae Research
- Minerals Flotation and Separation Techniques
- Advanced biosensing and bioanalysis techniques
- Geomagnetism and Paleomagnetism Studies
- Calcium Carbonate Crystallization and Inhibition
- Chemical Synthesis and Analysis
- Force Microscopy Techniques and Applications
- nanoparticles nucleation surface interactions
- Molecular Junctions and Nanostructures
- Supramolecular Self-Assembly in Materials
- Magnetic and Electromagnetic Effects
- Characterization and Applications of Magnetic Nanoparticles
- Bone Tissue Engineering Materials
- Food Industry and Aquatic Biology
- Surface Modification and Superhydrophobicity
- Geochemistry and Elemental Analysis
- CO2 Sequestration and Geologic Interactions
- Nanofabrication and Lithography Techniques
- Micro and Nano Robotics
- Silk-based biomaterials and applications
- Microfluidic and Capillary Electrophoresis Applications
- Iron oxide chemistry and applications
- Paleontology and Stratigraphy of Fossils
- Animal Genetics and Reproduction
- Polymer Surface Interaction Studies
University of Leeds
2011-2023
University of Bristol
2015-2021
Immobilized biomineralizing protein Mms6 templates the formation of uniform magnetite nanoparticles in situ when selectively patterned onto a surface. Magnetic force microscopy shows that stable particles maintain their magnetic orientation at room temperature, and may be exchange coupled. This precision-mixed biomimetic/soft-lithography methodology offers great potential for future nanodevice fabrication. Detailed facts importance to specialist readers are published as "Supporting...
Metal and metal oxide nanoparticles (NPs) have many uses, the size, shape purity of NPs must be uniform to ensure that particles function in a known consistent manner. The synthesis usually requires high temperatures, pressures, harsh chemical reagents, which is both economically environmentally costly. In nature, biomineralisation used produce precise, pure NPs, using far milder reaction conditions reagents. Recently, bioinspired approach has been adopted proteins peptides that: occur...
Magnetic nanoparticles (MNPs) are in high demand within biomedical and nanotechnological industries. Size, shape, material crystal quality directly affect the particle's properties, namely their magnetic characteristics, must be tuned controlled to meet specification of application. A key challenge is refine synthetic methods tailor MNP properties with precision, but using cheap, high-yield, industrially robust environmentally friendly methods. In this study we compare simple high-yield...
Significance Magnetotactic bacteria produce morphologically precise magnetite nanoparticles within organelles termed “magnetosomes.” Biomineralization proteins tightly regulate crystallization of these nanoparticles. A master protein regulator particle morphology in vivo, magnetosome membrane specific F (MmsF), has recently been discovered. In this study, we purified MmsF and two homologous from Magnetospirillum magneticum strain AMB-1. imposes strict control over the formation when added to...
Kristen Fichthorn opened the discussion of introductory lecture by James De Yoreo: I noted that in your potential mean force (PMF) plots for various particle orientations, fluctuations occur such different orientations could be preferred at a fixed distance. Could this affect ag
Using a surface-based mimic of magnetosome interior, the biomineralisation protein Mms6 was found to be more effective nucleator than binder magnetite nanoparticles, and performs better its C-terminal region alone.
A cysteine-mutated biomineralisation protein (Mms6) patterned onto gold biotemplates magnetic nanoparticle arrays of magnetite and higher coercivity cobalt-doped magnetite. This demonstrates an adaptable, green approach for the future nanofabrication.
L1 0 cobalt platinum can be used to record data at approximately sixfold higher densities than it is possible on existing hard disks. Currently, fabricating CoPt requires high temperatures (≈500 °C) and expensive equipment. One ecological alternative exploit biomolecules that template nanomaterials ambient temperatures. Here, demonstrated a dual affinity peptide (DAP) biotemplate onto surface room temperature from an aqueous solution. part of the nucleates controls growth nanoparticles...
Abstract In a world with ever decreasing natural reserves, researchers are striving to find sustainable methods of producing components for technology. Bioinspired, biokleptic and biomimetic materials can be used form wide range technologically relevant under environmentally friendly conditions. Here we investigate biotemplated bioinspired that develop devices, such as optics, photonics, photovoltaics, circuits data storage.
Insight into the nucleation, growth and phase transformations of calcium sulphate could improve performance construction materials, reduce scaling in industrial processes aid understanding its formation natural environment. Recent studies have suggested that pseudo polymorph, gypsum (CaSO4 ·2H2 O) can form aqueous solution via a bassanite ·0.5H2 intermediate. Some situ experimental work has also transformation to occur through an oriented assembly mechanism. In this work, we exploited liquid...
The cylindrical pores of track-etched membranes offer excellent environments for studying the effects confinement on crystallization as pore diameter is readily varied and anisotropic morphologies can direct crystal orientation. However, inability to image individual crystals in situ within this system has prevented many underlying mechanisms from being characterized. Here, we study calcium sulfate reveal that oriented gypsum forms 200 nm pores, bassanite 25-100 anhydrite 10 pores. pathways...
Many Modern Technologies, such as High Density Data Storage, Require Monodispersed Magnetic Nanoparticles (MNPs), which Have a Consistent Behavior, Specifically Immobilized onto Patterned Surface. Current Methods for Synthesizing Uniform Mnps Temperatures and Harsh Chemicals, Is Not Environmentally Friendly. Also, the Particles Are Expensive to Make Pattern Using Conventional Lithography Methods. Bacteria Able Synthesize in Vivo Biomineralization Proteins inside Magnetosome Vesicles Control...
Understanding how molecules in self-assembled soft-matter nanostructures are organized is essential for improving the design of next-generation nanomaterials. Imaging these assemblies can be challenging and usually requires processing, e.g., staining or embedding, which damage obscure features. An alternative to use bioinspired mineralization, mimicking certain organisms biomolecules template mineral formation. Previously, we have reported characterization Self-Assembled peptide caGEs...
X-ray scattering techniques provide a powerful means of characterizing the formation nanoparticles in solution.
Kristen Fichthorn opened the discussion of paper by Jutta Rogal: I find shapes nuclei that form in your studies interesting, as there is evidence fivefold twinned and with stacking faults can occur1,2 nucleation fcc systems. 1 J. C. E, L. Wang, Y. C
The ability to control crystal nucleation through the simple addition of a nucleating agent (nucleant) is desirable for huge range applications. However, effective agents are known only small number systems, and many questions remain about mechanisms by which they operate. Here, we explore features that make an nucleant demonstrate biological material hair─which naturally possesses chemically topographically complex surface structure─has excellent potential as agent. Crystallization poorly...
Micro- and nanoscale patterns of magnetic thin-films CoPt are biotemplated onto surfaces under mild reaction conditions.
L10 CoPt can be used in data storage, but high temperatures (500 °C) are usually needed to achieve this. On page 4590, J. Galloway and colleagues demonstrate a bioinspired ecological synthesis that uses biotemplating peptide form nanoparticles at room temperature. A surface covered with biotemplated magnetic is illustrated the back cover by Dr. Marcin Górzny (marcingorzny.com).
A biomineralization protein from magnetotactic bacteria (Mms6) used to control both the formation and location of magnetic nanoparticles in a patterned array. Mms6 immobilized on surface templates high-quality, crystalline magnetite particles with narrow grainsize distribution consistent behavior under relatively mild conditions. These are ferrimagnetic may be exchange-coupled surface, forming multiparticle attraction/repulsion zones. The nanomaterials arrays surfaces using various specific...
Abstract Review: 115 refs.
Abstract The design and assembly of peptide based materials has advanced considerably, leading to a variety fibrous, sheet nanoparticle structures. A remaining challenge is account for control different possible supramolecular outcomes accessible the same or similar building blocks. Here we present de novo system that forms nanoparticles sheets depending on strategic placement ‘disulfide pin’ between two elements secondary structure drive self-assembly. Specifically, join homodimerizing...