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Showing 1 to 20 of 33 for “"Inverse opal"”.
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The applications for 3d inverse opal microstructures
… structures applications, and in particular 3-D inverse opal micro structures made using spherical colloidal nanoparticles as building blocks. Because the interactions between colloidal particles are well understood and they are easy to synthesize, they have been widely used to grow these 3-D …
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New inverse opal hydrogels as platform for detecting macromolecules
… structured responsive hydrogels in formof an inverse opal. The stimuli-sensitive inverse opal hydrogels (IOHs) were prepared using a sacrificial opal template of monodispersed silica particles. First, monodisperse silica particles were assembled with a hexagonally packed structure via vertical …
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Effect of Ionic Liquid Electrolytes in DSSCs with Titanium Dioxide (TiO2) Inverse Opal Structures
… Here, we present a study of DSSCs with TiO2 inverse opal electrodes of controlled pore sizes (0.1-1 m) and ionic liquid derivatives of 1-alkyl-3-methylimidazolium tetrafluoroborate (alkyl: ethyl, butyl, and decyl) with viscosities ranging from 25.2 to 721 cP. The stability and functionality …
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Inverse opal hydrogel scaffolds as lymphoid microenvironments for the study of immune cell migration and immunotherapy
Immunotherapies harness the inherent potential of the body to destroy foreign or infected cells, by stimulating new or enhancing existing immune responses. One way to boost insufficient native immunity might be to engineer lymphoid tissue at disease sites (e.g., tumors). Such neotissues could be …
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Design of 3D Macroporous Inverse Opal TiO2 Binary and Ternary Composites Sensitized with Gold Nanoparticles and CdS Quantum Dots for Photocatalysis
… of a photocatalyst consisting of macroporous inverse opal (<em>io</em>) TiO<sub>2</sub> embedded with gold nanoparticles (AuNPs) and cadmium sulfide quantum dots (CdS QDs) into binary and ternary systems. These composites, labeled <em>io</em>TiO<sub>2</sub>-Au, <em>io</em>TiO<sub>2</sub>-CdS, …
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Ordered macroporous metal oxides and carbonaceous composites for Li-ion and beyond Li-ion batteries
… ordered macroporous materials, specifically inverse opal materials, for electrochemical energy storage systems, particularly rechargeable batteries. Exploring the potential of composite structures, this research focuses on TiO2/GeO2 nanocomposites and C/TiO2 inverse opal anodes in Li-ion …
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Synthesis and Characterization of Functional Mesostructures Using Colloidal Crystal Templating
… and removing the templates by chemical etching, inverse opal mesostructures with characteristic distances on the order of optical wavelengths were generated from conducting polymers, hydrogels, and metals. These active mesostructures allow tuning of properties such as Bragg diffraction, …
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Thermoelectric properties of polysilicon inverse opals
… for polycrystalline silicon structured as an inverse opal. An inverse opal provides nanoscale grains and a thin- lm like geometry to scatter phonons preferentially over electrons. Using solutions to the Boltzmann transport equation for electrons and phonons, we show that the gure of merit at …
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A Study on the Use of Inverse Opals Composed of Zinc Oxide Aggregate Popcorn Particles to Improve the Efficiency of Dye- Sensitized Solar Cells
… used to assemble the popcorn particles into an inverse opal structure. This is a unique application of EPD, which has previously been used to infiltrate nanoparticles (d ≤20nm range) Into opal templates, demonstrating the applicability of the technique to Nanoparticle aggregates (d ≥ 200 nm …
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Improving energy and power densities of three-dimensional next generation secondary battery electrodes
… pointed out that the use of relatively heavy Ni inverse opal as 3D current collector was problematic in the sense of compromising active material loading and electrode-based capacity. A quick and scalable colloidal templating method was developed with doctor blade casting and a real 3D (~ 50 μm) …
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Size-binary Zincblende: A Colloidal Approach to Omnidirectional Photonic Bandgaps
… crystal structures such as diamond cubic and inverse opal. In this investigation, we model zincblende with a crystal basis consisting of two spheres having independently variable radii and dielectric constants. Electromagnetic calculations implemented in the MIT Photonic Bands package (MPB) …
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Structure and Ionic Conductivity Properties of Ionic Liquid@Metal—Organic Framework Composites
… was further explored by utilising artificial opal polystyrene templates to generate ordered (inverse opal) and disordered macroporous networks within the MOF particles. The limited mechanical stability of the inverse opal MOF structure meant that gentle IL infiltration conditions were required …
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Two -Photon Polymerization of Defects in Photonic Crystals
… template for the final structure---a silicon-air inverse opal (which may exhibit a complete PBG) with embedded air defects. Embedded planar defects in silicon colloidal photonic crystals were optically characterized and high resolution embedded air defects in silicon-air inverse opals were …
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Integrating photosystem II and electroactive bacteria with three-dimensional electrodes for semi-artificial photosynthesis
… 3 presents a systematic study on benchmark inverse opal-indium tin oxide (IO-ITO) electrodes for protein film-photoelectrochemistry with photosystem II. The relationships of IO-ITO electrode structure and photosystem II activity were discussed following a combination of microscopic, …
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Semi-Artificial Photoelectrochemistry through Perovskite Integration and Elucidation of the Local Environment
… biocatalyst was immobilised on a hierarchical inverse opal mesoporous TiO₂ scaffold, and combined with the perovskite by a Ti foil platform, which provided structural support and enhanced moisture protection of the photoabsorber. The positive onset potential of the resultant photocathode …
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Molecular Hybrid Photocathodes Based on Silicon for Solar Fuel Synthesis
… motif were synthesised and immobilised on inverse opal-type electrodes designed specifically to accommodate large molecules. Rational design of the polymers’ co-monomers was aimed towards the provision of an artificial environment for the active complex that would influence product …
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Three-dimensional periodic structures for enhancing light-matter interaction and energy storage
… materials. A method based on epitaxial colloidal opal growth was developed to place fluorescent nanoparticles at specific locations inside 3D silicon inverse opal photonic crystals (PhCs), allowing the coupling between high dielectric contrast PhCs and localized emitters to be investigated. …
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Electrodeposited macroporous vanadium oxide Li-ion battery materials
… of 3D macroporous vanadium oxide inverse opals and binary inverse opals on transparent conducting oxide substrates and stainless steel and thermally oxidized stainless-steel substrates. The electrodeposition follows a diffusion limited growth mode to form 3D porous crystalline V2O5 …
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Doped Titanium Oxide Photcatalysts: Preparation, Structure and Interaction With Viruses
… ratio and calcination temperature. A TiON inverse opal structure was created, which demonstrated enhanced visible light absorption and subsequently improved photocatalytic efficiency by the combination of chemical and physical modifications on n-TiO2. The effect of palladium dopant on the …
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Fundamental studies towards the fabrication of electroactive monolithic stationary phases in microfluidic channels
… been used to microstructure materials and the inverse opal structure comprises pore sizes of the order of what was needed for EMμ; therefore electropolymerization of aniline through a polystyrene colloidal crystal template strategy was chosen. Two alternative chip designs, CD1 and CD2, were …
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