A5051859168- Pickering emulsions and particle stabilization
- Material Dynamics and Properties
- Photonic Crystals and Applications
- Surfactants and Colloidal Systems
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Microfluidic and Bio-sensing Technologies
- Electrostatics and Colloid Interactions
- Photonic and Optical Devices
- Mesoporous Materials and Catalysis
- Biocrusts and Microbial Ecology
- Proteins in Food Systems
- Diatoms and Algae Research
- Phase Equilibria and Thermodynamics
- Nonlinear Optical Materials Studies
- Micro and Nano Robotics
- Orbital Angular Momentum in Optics
- Liquid Crystal Research Advancements
- Spectroscopy and Quantum Chemical Studies
- Nanocluster Synthesis and Applications
- nanoparticles nucleation surface interactions
- Advanced Electron Microscopy Techniques and Applications
- Advanced Fluorescence Microscopy Techniques
- Electrowetting and Microfluidic Technologies
- Polymer Surface Interaction Studies
Utrecht University
2016-2025
Tohoku University
2021
Nanomaterials Research (United States)
2016
University of Liège
2009
Institute for Atomic and Molecular Physics
1998-2008
Simmons University
2005
Philips (Netherlands)
1999-2004
Delft University of Technology
2001
University of Amsterdam
1996
AT&T (United States)
1995
A general method to coat colloids with silica is described. The amphiphilic, nonionic polymer poly(vinylpyrrolidone) (PVP) was adsorbed various colloidal particles such as small gold colloids, gold-shell silica-core particles, and large silver boehmite rods, gibbsite platelets, positively or negatively charged polystyrene. After this functionalization the stabilized could be transferred a solution of ammonia in ethanol directly coated smooth homogeneous shells variable thickness by addition...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of colloidal dispersions fluorescent, monodisperse silica spheresA. Van Blaaderen A. VrijCite this: Langmuir 1992, 8, 12, 2921–2931Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.acs.org/doi/10.1021/la00048a013https://doi.org/10.1021/la00048a013research-articleACS PublicationsRequest reuse permissionsArticle...
A new approach for the synthesis of colloidal gold shell particles with a dielectric core is described. Small nanoclusters were attached to functionalized surface silica particles. Reductive growth and coalescence these clusters lead formation closed layer. By variation thickness this layer radius it possible adjust plasmon resonance over whole visible infrared region spectrum. The optical properties made are in good agreement theoretical calculations core−shell Because their low...
We describe a general one-pot method for coating colloidal particles with amorphous titania. Various such as silica particles, large silver colloids, gibbsite platelets, and polystyrene spheres were successfully coated titania shell. Although there are several ways of different in the literature, each these methods is applicable to only one type material. The present especially useful giving opportunity cover many types forgoes use coupling agent or precoating step. can produce smooth layer...
Although the experimental study of spherical colloids has been extensive, similar studies on rodlike particles are rare because suitable model systems scarcely available. To fulfill this need, we present synthesis monodisperse silica with tunable dimensions. Rods were produced diameters 200 nm and greater lengths up to 10 μm, resulting in aspect ratios from 1 ∼25. The growth mechanism these rods involves emulsion droplets inside which condensation takes place. Due an anisotropic supply...
We report the growth of binary colloidal crystals with control over crystal orientation through a simple layer-by-layer process. Well-ordered single stoichiometry large (L) and small (S) particles LS2 LS were generated. In addition, we observed formation an LS3 superstructure. The structures formed as result templating effect first layer forces exerted by surface tension drying liquid. By using spheres different composition, one component can be selectively removed, is demonstrated in...
Colloidal particles with site-specific directional interactions, so called “patchy particles”, are promising candidates for bottom-up assembly routes towards complex structures rationally designed properties. Here we present an experimental realization of patchy colloidal based on material independent depletion interaction and surface roughness. Curved, smooth patches rough colloids shown to be exclusively attractive due their different overlap volumes. We discuss in detail the case one...
In this work, we show strong experimental evidence in favor of a proposed incorporation mechanism hydrophobic semiconductor nanocrystals (or quantum dots, QDs) monodisperse silica spheres (diameter ∼35 nm) by water-in-oil (W/O) reverse microemulsion synthesis. Fluorescence spectroscopy is used to investigate the rapid ligand exchange that takes place at QD surface upon addition various synthesis reactants. It found hydrolyzed TEOS has high affinity for and replaces amine ligands, which...
We use digital holographic microscopy and Mie scattering theory to simultaneously characterize track individual colloidal particles. Each snapshot provides enough information measure a sphere's radius refractive index within 1%, its three-dimensional position with nanometer in-plane precision 10 axial resolution.
The rapid development of nanomaterials with unique size-tunable properties forms the basis for a variety new applications, including temperature sensing. Luminescent nanoparticles (NPs) have demonstrated potential as sensitive nanothermometers, especially in biological systems. Their small size offers possibility mapping profiles high spatial resolution. range is however limited, which prevents use high-temperature applications such as, example, nanoelectronics, thermal barrier coatings, and...
The real-space structure of hard-sphere glasses quenched from colloidal liquids in thermodynamic equilibrium has been determined. Particle coordinates were obtained by combining the optical sectioning capability confocal fluorescence microscopy with specially prepared fluorescent silica colloids. Both average and local glasses, volume fractions ranging 0.60 to 0.64, good agreement random close packings generated computer simulations. No evidence a divergent correlation length was found....
Optical waveguide amplifiers based on polymer materials offer a low-cost alternative for inorganic amplifiers. Due to the fact that their refractive index is similar of standard optical fibers, they can be easily coupled existing fibers with low coupling losses. Doping rare-earth ions yield gain not straightforward, as salts are poorly soluble in matrix. This review article focuses two different approaches dope ions. The first approach organic cage-like complexes encapsulate ion and designed...
Fluorescent nanoparticles have been synthesized with a metal core, silica-spacer shell, and dye-labeled silica shell. Cascade-yellow-labeled, silver-core carboxyfluorescein-labeled, gold-core dye–metal distances of 24–25 nm exhibit fluorescence enhancement factors as high 12.5 6.8, respectively. particles distance ∼15 show significant quenching.
We report on a new type of composite particles consisting zinc sulfide (ZnS) core and silica (SiO2) shell or vice versa. developed optimized these for photonic applications, because ZnS has large refractive index does not absorb light in the visible both SiO2 can be easily doped with fluorophores. Both kinds morphologies were created using seeded growth procedure monodisperse seeds which homogeneous layers well-defined thickness grown. Moreover, cores could completely dissolved leaving...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDispersions of Rhodamine-Labeled Silica Spheres: Synthesis, Characterization, and Fluorescence Confocal Scanning Laser MicroscopyNynke A. M. Verhaegh Alfons van BlaaderenCite this: Langmuir 1994, 10, 5, 1427–1438Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 1994https://doi.org/10.1021/la00017a019RIGHTS & PERMISSIONSArticle Views3845Altmetric-Citations251LEARN ABOUT THESE METRICSArticle Views...