Self-assembled 3D photonic crystals from ZnO colloidal spheres

Seelig, E. W.; Tang, Betty; Yamilov, Alexey; Cao, Hui; Chang, Robert P. H.

doi:10.1016/s0254-0584(02)00492-3

Cited by 203 publications

(130 citation statements)

References 28 publications

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“…Gravitational sedimentation [17][18][19] or sedimentation forced by different agents as electrostatic immobilization [20], colloidal crystal templating [21], shear alignment [22], oscillatory shear [23] or flow assisted electrophoresis [24,25] and vertical deposition [26][27][28], which is the technique we have selected, are some examples. The efficiency of the vertical deposition [9,29], relies on the balance between solvent evaporation and particle sedimentation.…”

Section: Introductionmentioning

confidence: 99%

On the parameters influencing the deposition of polystyrene colloidal crystals

Yoldi

Arcos

Paulke

et al. 2008

Materials Science and Engineering: C

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Colloidal crystals of polystyrene particles of 1.0, 1.4 and 2.8 μm diameter have been prepared by vertical deposition. The influence of parameters such as temperature, particle size and concentration as well as dispersion medium has been studied. The size of domain and the crystalline structure of the particle arrays have been analyzed by optical microscopy. The quality of the crystals has been improved (minimizing cracks) by controlling sedimentation (density matching), evaporation (volatility of the medium) and drying (co-solvents).

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Section: Introductionmentioning

confidence: 99%

On the parameters influencing the deposition of polystyrene colloidal crystals

Yoldi

Arcos

Paulke

et al. 2008

Materials Science and Engineering: C

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“…A recent, considerable interest in particle motion in confined geometries has been stimulated by development of new experimental techniques [2,3,4,5,6,7] and by emerging applications, such as the microfluidic devices [8] and technologies for production of microstructured materials by a self-assembly process [9,10].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic interactions of spherical particles in Poiseuille flow between two parallel walls

Bhattacharya¹,

Bławzdziewicz²,

Wajnryb³

2006

Physics of Fluids

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We study hydrodynamic interactions of spherical particles in incident Poiseuille flow in a channel with infinite planar walls. The particles are suspended in a Newtonian fluid, and creeping-flow conditions are assumed. Numerical results, obtained using our highly accurate Cartesian-representation algorithm [Physica A xxx, xx, 2005], are presented for a single sphere, two spheres, and arrays of many spheres. We consider the motion of freely suspended particles as well as the forces and torques acting on particles adsorbed at a wall. We find that the pair hydrodynamic interactions in this wall-bounded system have a complex dependence on the lateral interparticle distance due to the combined effects of the dissipation in the gap between the particle surfaces and the backflow associated with the presence of the walls. For immobile particle pairs we have examined the crossover between several far-field asymptotic regimes corresponding to different relations between the particle separation and the distances of the particles from the walls. We have also shown that the cumulative effect of the far-field flow substantially influences the force distribution in arrays of immobile spheres. Therefore, the far-field contributions must be included in any reliable algorithm for evaluating many-particle hydrodynamic interactions in the parallel-wall geometry.

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“…The monodisperse ZnO was synthesized in secondary reaction by using the method described in [10]. The second reaction procedure was the same as primary reaction, i.e.…”

Section: Synthesis Of Zno Spsmentioning

confidence: 99%