Ordered Macroporous Materials by Colloidal Assembly: A Possible Route to Photonic Bandgap Materials

Subramanian, G.; Manoharan, Vinothan N.; Thorne, James D.; Pine, David J.

doi:10.1002/(sici)1521-4095(199910)11:15<1261::aid-adma1261>3.0.co;2-a

Cited by 291 publications

(215 citation statements)

References 1 publication

Supporting

Mentioning

204

Contrasting

Unclassified

Order By: Relevance

“…To control the overall shape of composite colloidal crystals, doctor-blade coating and spin-coating processes are used for fl at fi lms [17,18], and confi ned geometries have been adapted for other shapes such as spheres, ellipsoids, fi bers and lined structures [19]. Formation processes involving dispersion in crosslinkable or polymerizable liquid and solidifi cation are much faster than conventional crystallization processes such as evaporation, sedimentation, fi ltration or dip-coating from colloidal solution in evaporable liquids [20][21][22][23].…”

Section: Colloidal Crystalsmentioning

confidence: 99%

Self-assembled colloidal structures for photonics

et al. 2011

View full text Add to dashboard Cite

A s dielectric structures with a submicrometer length scale can interact strongly with light, various remarkable optical responses can be designed and tailored depending on the types and parameters of their structures. Over the past few decades, the unusual optical properties of the periodic dielectric structures called photonic crystals have been investigated intensively [1]. Many research groups have endeavored to engineer the optical properties of photonic crystals, including photonic bandgaps, 'slow' photons, negative refraction and other properties, or to use them in practical applications. Two-dimensional (2D) structures, which are mostly prepared by conventional lithographic processes, were demonstrated initially, in which total internal refl ections were adopted for confi ning the light in a nonperiodic third direction, and their use has been investigated in some limited applications [2]. Th ree-dimensional (3D) structures have also been investigated intensively because of their complete photonic bandgaps in certain structures, a critical property for controlling light in 3D space. Research on such structures has been supported by the recent development of facile fabrication methods, including the selfassembly of simple monodisperse particles, also known as colloidal self-assembly [3], block copolymer self-assembly [4], the auto-cloning process [5] and holographic lithography [6]. Of these methods, colloidal self-assembly is the most promising for the low-cost production of 2D and 3D photonic crystals over large areas or with various shapes [7,8]. Schematic diagrams of the basic colloidal crystal structure along with inverse and short-range-ordered scattering structures for photonic applications are shown in Figure 1. Disordered dielectric structures of monodisperse particles called photonic glasses have begun to be investigated as another class of photonic nanostructures that can manifest some unusual optical phenomena such as random lasing, strong light localization and long-range intensity correlations. In this review article, we describe self-assembled colloidal photonic nanostructures in brief and summarize recent achievements in the fi eld of colloidal photonic nanostructures and their applications. Fabrication of photonic nanostructures by colloidal assembly Colloidal crystalsSince Vanderhoff 's serendipitous discovery of a synthetic method for preparing monodisperse polymer colloids [9], the method has been extended to the preparation of a variety of polymeric colloids and also to the processing of inorganic colloidal particles such as silica, titania and iron oxide. As long as particles are stable in liquid and their size distribution is suffi ciently narrow, they can be crystallized in a facecentered cubic (fcc) lattice by increasing their volume fraction through any concentration process, such as controlled evaporation, sedimentation or fi ltration. In general, the interparticle forces can be described by summing over the various potentials from diff erent origins, including intermolecular for...

show abstract

Section: Colloidal Crystalsmentioning

confidence: 99%

Self-assembled colloidal structures for photonics

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The nanopatterning of thin films by low-and medium-energy ion irradiation through a Langmuir-Blodgett (LB) monolayer of silica particles (nanomasks) is a widely used technique for electrical and optical applications [1][2][3][4]. The nanomasks are densely packed hexagonally ordered systems of silica particles used for the local modification of macroscopic surfaces at the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Ar+ ion irradiation-induced reorganization of colloidal silica nanoparticles in Langmuir–Blodgett monolayers

et al. 2015

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

Ordered Macroporous Materials by Colloidal Assembly: A Possible Route to Photonic Bandgap Materials

Cited by 291 publications

References 1 publication

Self-assembled colloidal structures for photonics

Self-assembled colloidal structures for photonics

Ar+ ion irradiation-induced reorganization of colloidal silica nanoparticles in Langmuir–Blodgett monolayers

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

Contact Info

Product

Resources

About