A5008778962- Calcium Carbonate Crystallization and Inhibition
- Diatoms and Algae Research
- Bone Tissue Engineering Materials
- Cephalopods and Marine Biology
- Paleontology and Stratigraphy of Fossils
- Marine Biology and Environmental Chemistry
- Advanced Photocatalysis Techniques
- Advancements in Battery Materials
- Copper-based nanomaterials and applications
- Ga2O3 and related materials
- Silk-based biomaterials and applications
- Adhesion, Friction, and Surface Interactions
- ZnO doping and properties
- TiO2 Photocatalysis and Solar Cells
- GaN-based semiconductor devices and materials
- Metal and Thin Film Mechanics
- Advanced Battery Materials and Technologies
- Minerals Flotation and Separation Techniques
- Magnetic and Electromagnetic Effects
- Gas Sensing Nanomaterials and Sensors
- Supercapacitor Materials and Fabrication
- Polymer Surface Interaction Studies
- Insect and Arachnid Ecology and Behavior
- Crystallization and Solubility Studies
- Mesoporous Materials and Catalysis
University of California, Irvine
2020-2025
Irvine University
2020-2025
University of California, Riverside
2013-2022
Weizmann Institute of Science
2019
University of California System
2015-2018
Riverside
2015-2018
Materials Science & Engineering
2017
Chinese Academy of Sciences
2014
Materials Systems (United States)
2010
Cornell University
2010
Hammering Home the Lesson Stomatopods are marine crustaceans that use hammerlike claws for defense and to attack their prey. The undergo repeated high-velocity high-force impacts. Weaver et al. (p. 1275 ; see Perspective by Tanner ) used a variety of techniques examine structure, mechanical behavior, toughening mechanisms claw Peacock Mantis shrimp. claw's composite structure is optimized toughness, which helps prevent complete failure might arise from repetitive hammering.
More than just an empty shell: Multishelled Co3O4 microspheres were synthesized as anode materials for lithium-ion batteries in high yield and purity. As their porous hollow multishell structure guarantees a shorter Li+ diffusion length sufficient void space to buffer the volume expansion, rate capacity, cycling performance, specific capacity excellent (1615.8 mA h g−1 30th cycle triple-shelled Co3O4; see graph). service our authors readers, this journal provides supporting information...
Hierarchically ordered macro−mesoporous titania films have been produced through a confinement self-assembly method within the regular voids of colloidal crystal with three-dimensional periodicity. Furthermore, graphene as an excellent electron-accepting and electron-transporting material has incorporated into hierarchically frameworks by in situ reduction oxide added system. Incorporation interconnected macropores mesoporous improves mass transport film, reduces length mesopore channel,...
Herein, uniform multishelled TiO2 hollow microspheres were synthesized, especially 3- and 4-shelled synthesized for the first time by a simple sacrificial method capable of controlling shell thickness, intershell spacing, number internal multishells, which are achieved size, charge, diffusion rate titanium coordination ions as well calcination process. Used anodes lithium ion batteries, show excellent capacity, good cycling performance, high specific capacity. A superior up to 237 mAh/g with...
Mehr als nur eine leere Schale: Mehrschalige Co3O4-Mikrokugeln wurden in hohen Ausbeuten Anodenmaterial für Lithiumionenbatterien synthetisiert. Die poröse hohle Struktur sorgt kürzere Li+-Diffusionslänge und bietet ausreichend Leerraum, um die Volumenausdehnung abzupuffern. spezifische Kapazität des Materials ist exzellent (1615.8 mA h g−1 im 30. Zyklus dreischaliges Co3O4; siehe Graph).
Abstract Porous platinum nanotubes (PtNTs) with a all thickness of 5 nm, an outer diameter 60 and length 5–20 μm are synthesized by galvanic displacement silver nanowires, which formed the ethylene glycol reduction nitrate. Oxygen reaction (ORR) durability experiments conducted for PtNTs, Pt nanoparticles supported on carbon (Pt/C), bulk polycrystalline (BP‐Pt) electrocatalysts to evaluate their catalytic properties use as cathode catalysts in proton exchange membrane fuel cells. PtNTs...
A fibrous herringbone-modified helicoidal architecture is identified within the exocuticle of an impact-resistant crustacean appendage. This previously unreported composite microstructure, which features highly textured apatite mineral templated by alpha-chitin matrix, provides enhanced stress redistribution and energy absorption over traditional design under compressive loading. Nanoscale toughening mechanisms are also using high-load nanoindentation in situ transmission electron microscopy...
Recent analyses of the ultrastructural and mechanical properties mineralized biological materials have demonstrated some common architectural features that can help explain their observed damage tolerance. Nature has accomplished this feat through precise control anisotropic crystal nucleation growth processes in conjunction with nanoscale over self-assembly spatially distinct organic inorganic phases, resulting effective inhibition crack propagation these materials. One such example is...
Silicatein, an enzymatic biocatalyst purified from the glassy skeletal elements of a marine sponge, and previously shown capable catalyzing structurally directing hydrolysis polycondensation silicon alkoxides to yield silica silsesquioxanes at low temperature pressure neutral pH, is be templating subsequent water-stable alkoxide-like conjugate titanium form dioxide. The structure behavior TiO2 formed through this biocatalytic route, including thermally induced crystal grain growth phase...
Uniform TiO<sub>2</sub>nanospheres formed from hollow and mesoporous nanospheres composed of 7 nm sized nanoparticles have been synthesized show superior rate performance as anode materials for lithium ion batteries.
Nanostructural control of gallium oxide formation is achieved at low temperatures by the enzyme-catalyzed hydrolysis and polycondensation precursors. Filaments silicatein, a hydrolase originally discovered in marine sponge, catalyze gallium(III) nitrate, producing oriented nanocrystallites along length filaments (see Figure) absence acid or alkali.
The individual toothed sucker rings of squid tentacles (highlighted in blue) provide additional gripping power during prey capture and handling. These comprise a nanoscale network parallel tubular elements, as shown the background image. structural, mechanical, biochemical properties this wholly organic material are discussed detail.
Chiton are marine mollusks who use heavily mineralized and ultrahard teeth to feed on epilithic endolithic algae intertidal rocks. To fulfill this function, chiton must be tough wear‐resistant. Impressive mechanical properties achieved in the tooth through a hierarchically arranged composite structure consisting of hard shell organic‐encased highly oriented nanostructured magnetite rods that surround soft core organic‐rich iron phosphate. Microscopic spectroscopic analyses combined with...
Abstract During mineralization, the hard outer magnetite‐containing shell of radular teeth Cryptochiton stelleri undergoes four distinct stages structural and phase transformations: (i) formation a crystalline α ‐chitin organic matrix that forms framework non‐mineralized teeth, (ii) templated synthesis ferrihydrite crystal aggregates along these fibers, (iii) subsequent solid state transformation from to magnetite, (iv) progressive magnetite growth form continuous parallel rods within mature...