نتایج جستجو برای: mesoporous silica

تعداد نتایج: 43624  

Journal: :ACS nano 2010
Yu Chen Hangrong Chen Deping Zeng Yunbo Tian Feng Chen Jingwei Feng Jianlin Shi

A potential platform for simultaneous anticancer drug delivery and MRI cell imaging has been demonstrated by uniform hollow inorganic core/shell structured multifunctional mesoporous nanocapsules, which are composed of functional inorganic (Fe(3)O(4), Au, etc.) nanocrystals as cores, a thin mesoporous silica shell, and a huge cavity in between. The synthetic strategy for the creation of huge ca...

Journal: :Nanoscale 2015
Yuchen Pei Raghu V Maligal-Ganesh Chaoxian Xiao Tian-Wei Goh Kyle Brashler Jeffrey A Gustafson Wenyu Huang

Metal nanostructures have attracted great attention in various fields due to their tunable properties through precisely tailored sizes, compositions and structures. Using mesoporous silica (mSiO2) as the inorganic capping agent and encapsulated Pt nanoparticles as the seeds, we developed a robust seeded growth method to prepare uniform bimetallic nanoparticles encapsulated in mesoporous silica ...

Journal: :Analytical chemistry 2012
Hyunjoo J Lee Kwan Kyu Park Mario Kupnik Nicholas A Melosh Butrus T Khuri-Yakub

Distributed sensing of gas-phase chemicals is a promising application for mesoporous materials when combined with highly sensitive miniaturized gas sensors. We present a direct application of a mesoporous silica thin film on a highly sensitive miniaturized resonant chemical sensor with a mass sensitivity at the zeptogram scale for relative humidity and CO(2) detection. Using mesoporous silica t...

2001
Dongyuan Zhao Peidong Yang Qisheng Huo Bradley F Chmelka D Stucky

Major advances in the field of ordered mesoporous materials have been achieved in topological structure definition at the meso phase, and macroscale levels (shape and morphology) using molecular control during mesoporous materials synthesis. Examples include the use of block copolymers for the preparation of mesoporous materials with large pore sizes (> 30 nm), the formation of mesoporous silic...

2015
Dana L. Martens David K. Wang Julius Motuzas Simon Smart João C. Diniz da Costa

Finite control of pore size distributions is a highly desired attribute when producing porous materials. While many methodologies strive to produce such materials through one-pot strategies, oftentimes the pore structure requires post-treatment modification. In this study, modulation of pore size in cobalt-silica systems was investigated by a novel, non-destructive, self-templated method. These...

Journal: :Chemical communications 2011
Xin Gu Weimo Zhu Chunjiang Jia Rui Zhao Wolfgang Schmidt Yanqin Wang

Highly ordered mesoporous NiFe(2)O(4) with excellent microwave absorption properties has been synthesized by using mesoporous silica (KIT-6) as a hard template.

2013
Hongmin Chen Zipeng Zhen Wei Tang Trever Todd Yen-Jun Chuang Lianchun Wang Zhengwei Pan Jin Xie

We report herein a straightforward and label-free approach to prepare luminescent mesoporous silica nanoparticles. We found that calcination at 400 °C can grant mesoporous organosilica nanoparticles with strong fluorescence of great photo- and chemical stability. The luminescence is found to originate from the carbon dots generated from the calcination, rather than the defects in the silica mat...

Journal: :Dalton transactions 2014
Jennifer Shusterman Harris Mason Anthony Bruchet Mavrik Zavarin Annie B Kersting Heino Nitsche

Functionalized mesoporous silica has applications in separations science, catalysis, and sensors. In this work, we studied the fundamental interactions of trivalent cations with functionalized mesoporous silica. We contacted trivalent cations of varying ionic radii with N-[5-(trimethoxysilyl)-2-aza-1-oxopentyl]caprolactam functionalized mesoporous silica with the aim of probing the binding mech...

2011
Silo Meoto Marc-Olivier Coppens

1. Introduction Mesoporous materials with ordered arrays of uniform nanochannels of a controllable size have wide-ranging applications, one of which is membrane separation. In order to be used as a membrane for size-exclusive separation of molecules, it is necessary to synthesize a defect-free structure with continuous nanoporosity. Mesoporous silica and porous anodic alumina have been extensiv...

2012
Mengxing Dong Zhuofu Wu Ming Lu Zhi Wang Zhengqiang Li

Aminopropyl-functionalized SBA-15 mesoporous silica was used as a support to adsorb myoglobin. Then, in order to avoid the leakage of adsorbed myoglobin, lysozyme was covalently tethered to the internal and external surface of the mesoporous silica with glutaraldehyde as the coupling agent. The property of amino-functionalized mesoporous silica was characterized by N(2) adsorption-desorption an...

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