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Mesoporous colloidal nanospheres with tailorable asymmetric nanostructures and multimetallic elemental compositions are building blocks in next-generation heterogenous catalysts. Introducing structural asymmetry into metallic mesoporous frameworks has never been demonstrated, but it would be beneficial because the asymmetry enables the spatial control of catalytic interfaces, facilitates the electron/mass transfer and assists in the removal of poisonous intermediates. Herein, we describe a simple bottom-up strategy to generate uniform sub-100 nm multimetallic asymmetric bowl-shaped mesoporous nanospheres (BMSs). This method uses a surfactant-directed "dual"-template to control the kinetics of metal reduction on the surface of a vesicle, forming mesoporous metal islands on its surface whose spherical cone angle can be precisely controlled. The symmetric BMS mesostructures with different spherical cone angles (structural asymmetry) and elemental compositions were demonstrated. The high surface area and asymmetric nature of the metal surfaces were shown to enhance catalytic performance in the alcohol oxidation reactions. The findings illustrated here offer the novel and interesting opportunities for rational design and synthesis of hierarchically asymmetric nanostructures with desired functions for a wide range of applications.
This article was published in the following journal.
Name: Nano letters
Phosphomolybdate-based ionic liquid [(CH)NCH]PMoO was prepared and supported on a magnetic mesoporous silica (γ-FeO@SiO@mSiO) to obtain a magnetic mesoporous catalyst. The morphology and components o...
Unique nanostructure, high electrical conductivity, satisfactory energy density, and extraordinary cycling stability are important evaluation criteria for high-efficient energy storage devices. Herein...
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Ideal nanoscale drug delivery system (DDS) should be biocompatible, having targeted recognition and controlled release properties. In this work, monodispersed, doxorubicin (Dox) loaded chitosan (Cts) ...
The purpose of this study is to evaluate safety and efficacy of corneal cross-linking and photorefractive keratectomy for refractive correction in patients with bilateral asymmetric topogr...
The purpose of this study is to evaluate the effect of asymmetric spinal stabilization exercise on scoliosis
This study will assess changes in visual acuity and corneal symmetry after corneal collagen cross-linking (CXL) of asymmetric corneas.
The aim of the study is to identify the role of diffusion weighted MRI in the assessment of the clinical significance and outcomes of asymmetric breast densities identified on mammograms, ...
This longitudinal study evaluates the possible benefit of cochlear implantation in the poor ear of adults with asymmetric hearing loss who continue to use a hearing aid in the better heari...
Spherical particles of nanometer dimensions. They are biodegradable and self-assembling and have potential as DRUG CARRIERS and imaging agents.
Enzymes that catalyze inversion of the configuration around an asymmetric carbon in a substrate having one (racemase) or more (epimerase) center(s) of asymmetry. (Dorland, 28th ed) EC 5.1.
A uroplakin subtype that heterodimerizes with UROPLAKIN IA to form a component of the asymmetric unit membrane found in urothelial cells.
A uroplakin subtype that heterodimerizes with UROPLAKIN IB to form a component of the asymmetric unit membrane found in urothelial cells.
A tetraspanin domain-containing uroplakin subtype. It heterodimerizes with UROPLAKIN II to form a component of the asymmetric unit membrane found in urothelial cells.