Search results for "Dense packing"

showing 2 items of 2 documents

Enhanced sampling in simulations of dense systems

2002

In the simulations of a variety of systems we encounter the problem of large relaxation times due to the dense packing of the systems constituents. We propose an algorithm to overcome this slowing down by temporarily allowing the constituents of a 3d systems to escape into a 4th space coordinate. The idea will be exemplified for the problem of a homopolymer collapse.

Hardware and ArchitectureMonte Carlo methodRelaxation (NMR)General Physics and AstronomyCollapse (topology)Sampling (statistics)Statistical physicsStatistical mechanicsSpace (mathematics)Dense packingMathematicsComputer Physics Communications
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Chemical Approach to Functional Artificial Opals

2007

Artificial opals are self-assembled colloidal crystals, which consist of a cubic dense packing (fcc) of hard (not film-forming) colloids with diameters ranging from 200 to 900 nm. Because of their periodic nanostructure the assemblies are able to reflect light that matches their periodicity, i.e., UV- to IR-radiation depending on the size of the colloids. Thus, they present a subgroup of 'photonic crystals'. While, originally, the chemistry inside the colloids and the resulting opals was of minor significance, nowadays the chemical variation of opals is becoming more and more important for the preparation of functional and patterned opals. The search for functional opals is, therefore, espe…

chemistry.chemical_classificationNanostructureMaterials sciencePolymers and PlasticsOrganic ChemistryColoring agentsNanotechnologyPolymerColloidal crystalOPALS (Ogren Plant Allergy Scale)ColloidchemistryMaterials ChemistryDense packingPhotonic crystalMacromolecular Rapid Communications
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