Dispersions of Rhodamine-Labeled Silica Spheres: Synthesis, Characterization, and Fluorescence Confocal Scanning Laser Microscopy

Verhaegh, N.A.M.; Blaaderen, Alfons van

doi:10.1021/la00017a019

Cited by 289 publications

(236 citation statements)

References 2 publications

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“…34 The polydispersity was 5.6% ͑standard deviation divided by mean diameter͒. The spheres were coated with a stabilizing layer of n-octadecyl chains, allowing the spheres to form stable dispersions in apolar, refractive index matching solvents such as chloroform.…”

Section: Methodsmentioning

confidence: 99%

“…The fluorescence confocal microscope has been used to study colloidal crystals, for example, an equilibrium interface of a coexisting colloidal liquid and a colloidal crystal phase ͑two-state structure͒ and the dynamics of crystallization in a crystallizing system. 34 A preliminary determination of the crystalline stacking in four subsequent crystal planes in several crystallites indicated an hcp stacking. 31 In this paper we present the three-dimensional structure of a colloidal crystal in a silica dispersion as determined with fluorescence CSLM.…”

Section: Introductionmentioning

confidence: 99%

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Direct observation of stacking disorder in a colloidal crystal

Verhaegh

Duijneveldt

Blaaderen

et al. 1995

The Journal of Chemical Physics

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Colloidal crystals of rhodamine labeled silica spheres dispersed in chloroform have been studied with fluorescence confocal scanning laser microscopy. We report the first determination of the three-dimensional crystalline stacking in the bulk of a concentrated dispersion. The structure was found to consist of a random stacking of close-packed planes. The results are compared with light scattering experiments.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Direct observation of stacking disorder in a colloidal crystal

Verhaegh

Duijneveldt

Blaaderen

et al. 1995

The Journal of Chemical Physics

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“…From literature it is known that styrene can easily be incorporated into a PMMAlatex matrix (16,17). We note that the methods described above are analogous to the way in which silica is made fluorescent by using FITC or similar dyes (see for example (18)). …”

Section: Fluorescent Monomersmentioning

confidence: 97%

Preparation of Monodisperse, Fluorescent PMMA–Latex Colloids by Dispersion Polymerization

Bosma

Pathmamanoharan

Hoog

et al. 2002

Journal of Colloid and Interface Science

194

246

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“…37 For the two largest silica particles with radii of 210 and 500 nm, first a Rhodamine-B labeled core was synthesized, which is then coated with a 100-200 nm layer of nonfluorescent silica according to Ref. 38, which is a modification of the Stöber synthesis. 39 Typical dye contents …”

Section: The Colloidal Systemsmentioning

confidence: 99%

Diffusion of spheres in crowded suspensions of rods

Kang

Gapiński

Lettinga

et al. 2005

The Journal of Chemical Physics

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Translational tracer diffusion of spherical macromolecules in crowded suspensions of rodlike colloids is investigated. Experiments are done using several kinds of spherical tracers in fd-virus suspensions. A wide range of size ratios L/2a of the length L of the rods and the diameter 2a of the tracer sphere is covered by combining several experimental methods: fluorescence correlation spectroscopy for small tracer spheres, dynamic light scattering for intermediate sized spheres, and video microscopy for large spheres. Fluorescence correlation spectroscopy is shown to measure long-time diffusion only for relatively small tracer spheres. Scaling of diffusion coefficients with a/ , predicted for static networks, is not found for our dynamical network of rods ͑with the mesh size of the network͒. Self-diffusion of tracer spheres in the dynamical network of freely suspended rods is thus fundamentally different as compared to cross-linked networks. A theory is developed for the rod-concentration dependence of the translational diffusion coefficient at low rod concentrations for freely suspended rods. The proposed theory is based on a variational solution of the appropriate Smoluchowski equation without hydrodynamic interactions. The theory can, in principle, be further developed to describe diffusion through dynamical networks at higher rod concentrations with the inclusion of hydrodynamic interactions. Quantitative agreement with the experiments is found for large tracer spheres, and qualitative agreement for smaller spheres. This is probably due to the increasing importance of hydrodynamic interactions as compared to direct interactions as the size of the tracer sphere decreases.

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Dispersions of Rhodamine-Labeled Silica Spheres: Synthesis, Characterization, and Fluorescence Confocal Scanning Laser Microscopy

Cited by 289 publications

References 2 publications

Direct observation of stacking disorder in a colloidal crystal

Direct observation of stacking disorder in a colloidal crystal

Preparation of Monodisperse, Fluorescent PMMA–Latex Colloids by Dispersion Polymerization

Diffusion of spheres in crowded suspensions of rods

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