Sandwich structured graphene modified TiO2 mesoporous single crystals (GR-MSCs) were obtained by using the graphene embedded silica spheres as the hard template, via a hydrothermal treatment. The selective photocatalysis of TiO2 can be achieved by controlling the location of graphene in TiO2 mesoporous single crystals. The sandwich structured graphene-TiO2 composite has a photooxidation surface...

We report a method for synthesizing various shaped colloidal microparticles using microfluidic devices with structured elastomeric membranes. These elastomeric membranes incorporated between two-layered channels have negative relief structures, and pneumatically actuated membrane leads to confinement of fluid inside structures. Using this microfluidic system, we demonstrate synthesis of various...

Light-emitting diodes (LEDs), including organic LEDs and polymer LEDs, have been studied intensively for use in displays and interior lighting due to their promising advantages of high effi ciency, high contrast ratio, long lifetime and low power consumption. [ 1 , 2 ] However, in a conventionally structured LED, less than 20% of the generated light is emitted as useful radiation. [ 3 , 4 ] Not...

PURPOSE The purpose of this study was to evaluate the effect of nano-structured alumina surface coating on shear bond strength between Y-TZP ceramic and various dual-cured resin cements. MATERIALS AND METHODS A total of 90 disk-shaped zirconia specimens (HASS CO., Gangneung, Korea) were divided into three groups by surface treatment method: (1) airborne particle abrasion, (2) tribochemicalsil...

The giant basal spicule of the hexactinellid sponge Monorhaphis chuni represents the longest natural siliceous structure on Earth. This spicule is composed of concentrically arranged lamellae that are approximately 10 μm thick. In the present study, we investigated the formation of outer lamellae on a cellular level using microscopic and spectroscopic techniques. It is shown that the formation ...

This critical review shows that diatoms can be a source of inspiration for the synthesis of advanced nanostructured biohybrids. These single cell microalgae are living inside a porous silica shell called 'frustule'. Mimicking this model, silica-based biohybrids have been produced via the so-called sol-gel process. Biomolecules such as proteins, enzymes or antibodies can be trapped within a sili...

Ordered mesoporous Cd(x)Zn(1-x)S ternary compound semiconductors were prepared with a simple nano-casting method using 3-D cubic Ia3d meso-structured silica, KIT-6, as a hard-template with the easily available precursors of 3CdSO4 x 8H2O and ZnSO4 x 7H2O. Thermal reduction of impregnated precursors resulted in the crystalline networks within the mesopore of the silica template, then the ordered...

High performance functional coatings, based on hybrid organic/inorganic materials, are being developed to combine the polymer flexibility and ease of processing with the mechanical properties and versatility of inorganic materials. By incorporating silica nanoparticles (SiNPs) in the polymeric matrices, it is possible to obtain hybrid polymer films with increased tensile strength and impact res...