High-speed fabrication of 3-dimensional colloidal photonic crystal films by slide coating of polymer microspheres with continuous feeding of colloidal suspension

Gil, Seung Chul; Seo, Young Gon; Kim, Seulgi; Shin, Jinsub; Lee, Wonmok

doi:10.1016/j.tsf.2010.05.066

Cited by 15 publications

(12 citation statements)

References 18 publications

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“…For instance, Hatton et al [12] demonstrated the fabrication of a large-area, crack-free, and highly ordered inverse opal over centimeter length scale by coassembly method. The Gil group demonstrated a rapid fabrication method for large-area and high-quality colloidal crystal film by using the slide cell coating process [13]. Thus, a single domain, large-area, and highly ordered 3D PhCs fabrication is viable.…”

Section: Introductionmentioning

confidence: 99%

Thermal radiation transmission and reflection properties of ceramic 3D photonic crystals

et al. 2012

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The infrared (IR) transmission and reflection properties of the ceramic thermal barrier coatings have great implications on the overall performance of a component operated at high temperatures, where a significant amount of heat from external IR radiation will propagate through the coating toward the underlying substrate. A hightemperature photonic structure can be used to limit this radiation transport while operating at temperatures above 1000°C. Herein, we present the concept of a broadband and angle-insensitive IR reflector, based on 3D photonic crystals (PhCs) that consists of a ceramic material with high thermal stability and low thermal conductivity. We numerically demonstrate that the multistack ceramic 3D PhCs can provide >80% of bi-hemispherical reflectance in the wavelength region of 1-5 μm.

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Section: Introductionmentioning

confidence: 99%

Thermal radiation transmission and reflection properties of ceramic 3D photonic crystals

et al. 2012

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“…[ 24 ] A slide glass (2.5 cm × 5.0cm) for bottom substrate was cleaned using Piranha solution (H 2 SO 4 : H 2 O 2 = 3:1 by volume) and DI water prior to use. A half-cut slide glass was immersed in 1m M Trichlorooctadecylsilane dissolved in 2,2,4-Trimethylpentane (Jusei) for 30 min to render it hydrophobic.…”

Section: Methodsmentioning

confidence: 99%

Rapid Fabrication of an Inverse Opal TiO₂ Photoelectrode for DSSC Using a Binary Mixture of TiO₂ Nanoparticles and Polymer Microspheres

Seo¹,

Woo²,

Kim³

et al. 2011

Adv Funct Materials

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A rapid fabrication method of highly reflective TiO2 inverse opal (IO) film exhibiting controllable thickness, high TiO2 content, and excellent interfacial contact with glass substrate is presented. By inducing accelerated solvent evaporation during the colloidal self‐assembly process, a composite film of polystyrene (PS)/TiO2 has been directly fabricated on a fluorine doped tin oxide (FTO) glass substrate, which exhibits the highly ordered opaline structure of PS embedded into the TiO2 matrix. This hybrid fabrication path leads to the formation of layers with the preferred {111} face‐centered cubic (FCC) orientation parallel to the substrate and to produce a 1 cm2‐wide well‐ordered composite colloidal crystal film in less than 30 min. The film showed highly ordered FCC structure, particularly at the upper region, due to the induced solvent evaporation and exhibited a reliable light modulation at a reflectance mode. Regardless of the size of sacrificial PS microspheres, TiO2 IO films of controllable thickness were successfully formed by varying the moving speed of the fabrication cell. The binary aqueous dispersion of tailor‐made anatase TiO2 nanoparticles and monodisperse PS microspheres showed a high degree of dispersion stability under basic conditions. Hydrothermal treatment of the TiO2 dispersion favored the crystallinity of the coated film and provided small volume contraction after thermal calcinations. The high degree of dispersion stability enabled to increase TiO2 content in a binary mixture, which is more favorable toward the robust and large‐area IO film. The calcined films exhibited excellent mechanical robustness and intimate interfacial contact with the glass substrate. which in turn resulted in higher TiO2 content near the glass substrate. The TiO2 IO film was tested as a dye‐sensitized solar cell (DSSC) photoelectrode, and a single cell showed a relatively high photon‐to‐current conversion efficiency of 4.2%. The high TiO2 content of IO film and its good adhesion to the FTO subratrate remarkably improved in the performance of the solar cell compared to the previous investigations where post‐infiltration of TiO2 had been employed.

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“…In majority of studies, researchers investigated properties of colloidal crystals made from the hard inorganic particles like silica [1], metals (for example gold [2, 3]), metal oxides like In 2 O 3 [4], TiO 2 [5], and homopolymers like polystyrene [6, 7]. However, for biosensors, there are needed colloidal crystals made from particles suitable for efficient binding of biomolecules.…”

Section: Introductionmentioning

confidence: 99%

Preparation and optical properties of novel bioactive photonic crystals obtained from core-shell poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) microspheres

et al. 2011

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Optical properties of polymer microspheres with polystyrene cores and polyglycidol-enriched shells poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) (P(S/PGL) particles with number average diameters Dn determined by scanning electron microscopy equal 237 and 271 nm), were studied before and after immobilization of ovalbumin. The particles were synthesized by emulsifier-free emulsion copolymerization of styrene and polyglycidol macromonomer (poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol)) initiated with potassium persulfate. Molar fraction of polyglycidol units in the interfacial layer of the microspheres determined by XPS was equal 42.6 and 34.0%, for the particles with Dn equal 137 and 271 nm, respectively. Colloidal crystals from the aforementioned particles were prepared by deposition of particle suspensions on the glass slides and subsequent evaporation of water. It was found that optical properties of colloidal crystals from the P(S/PGL) microspheres strongly depend on modification of their interfacial layer by covalent immobilization of ovalbumin. The coating of particles with ovalbumin resulted in decreasing their refractive index from 1.58 to 1.52.

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High-speed fabrication of 3-dimensional colloidal photonic crystal films by slide coating of polymer microspheres with continuous feeding of colloidal suspension

Cited by 15 publications

References 18 publications

Thermal radiation transmission and reflection properties of ceramic 3D photonic crystals

Thermal radiation transmission and reflection properties of ceramic 3D photonic crystals

Rapid Fabrication of an Inverse Opal TiO₂ Photoelectrode for DSSC Using a Binary Mixture of TiO₂ Nanoparticles and Polymer Microspheres

Preparation and optical properties of novel bioactive photonic crystals obtained from core-shell poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) microspheres

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High-speed fabrication of 3-dimensional colloidal photonic crystal films by slide coating of polymer microspheres with continuous feeding of colloidal suspension

Cited by 15 publications

References 18 publications

Thermal radiation transmission and reflection properties of ceramic 3D photonic crystals

Thermal radiation transmission and reflection properties of ceramic 3D photonic crystals

Rapid Fabrication of an Inverse Opal TiO2 Photoelectrode for DSSC Using a Binary Mixture of TiO2 Nanoparticles and Polymer Microspheres

Preparation and optical properties of novel bioactive photonic crystals obtained from core-shell poly(styrene/α-tert-butoxy-ω-vinylbenzyl-polyglycidol) microspheres

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Rapid Fabrication of an Inverse Opal TiO₂ Photoelectrode for DSSC Using a Binary Mixture of TiO₂ Nanoparticles and Polymer Microspheres