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Your search keyword '"Polystyrene opal"' showing total 2 results
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2 results on '"Polystyrene opal"'

1. Microscopy evidence of the face-centered cubic arrangement of monodisperse polystyrene nanospheres

Author

Zhang, Hui, Duan, Ren-guan, Li, Fan, Tang, Qing, and Li, Wen-chao

Subjects
*POLYSTYRENE, *SCANNING electron microscopy, *ELECTRON microscopy, *STYRENE, *THERMOPLASTICS
Abstract

Abstract: This paper reports a scanning electron microscopy (SEM) investigation of polystyrene artificial opal achieved through self-assembly of monodisperse polystyrene nanospheres with a diameter of 250nm from colloidal suspension after being ambient dried. A detailed analysis of the SEM images verifies that the face-centered cubic (fcc) phase is the most stable one for the polystyrene opal prepared. This finding provides a strong support for, by using polystyrene opal as template, fabricating a photonic crystal with inverse fcc structure of full band gap if the refractive index contrast is higher than 2.8 and the filling fraction of the high index materials is between 0.2 and 0.3. [Copyright &y& Elsevier]

Published
2007
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2. Three-dimensional metallic opals fabricated by double templating

Author

Yet-Ming Chiang, Chee Cheong Wong, Qingfeng Yan, and Pavan Nukala

Subjects
Gold-coated, Gelation, Materials science, Colloidal crystal, Template spheres, Crystal atomic structure, Nanotechnology, Electrochemical deposition, Substrate (electronics), High quality, Deposition current density, Photonic crystals, Colloid, chemistry.chemical_compound, Metallic photonic crystal, Electrodeposition, Self-assembled, Materials Chemistry, Silicon on insulator technology, Sol-gel process, Gold deposits, Reduction, Photonic crystal, Sol-gel, Template, Three dimensional, Templating, Metals and Alloys, Growth mechanisms, Silica, Surfaces and Interfaces, Self assembly, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Controlled thickness, Templating method, Metallic photonic crystals, Template reaction, chemistry, Chemical engineering, Silicate minerals, Polystyrenes, Inverse opal, Gold, Polystyrene, Self-assembly, Sol-Gel processing, Polystyrene opal
Abstract

We report a simple and cost-effective double templating method for fabricating large-area three-dimensional metallic photonic crystals of controlled thickness. A self-assembled polystyrene opal was used as the first template to fabricate a silica inverse opal on a gold-coated glass substrate via sol-gel processing. Gold was subsequently infiltrated to the pores of the silica inverse opal using electrochemical deposition. A high-quality three-dimensional gold photonic crystal was obtained after removal of the secondary template (silica inverse opal). The effects of template sphere size and deposition current density on the gold growth rate, and the resulting morphology and growth mechanism of the gold opal, were investigated. � 2009 Elsevier B.V. All rights reserved.

Published
2009

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