نتایج جستجو برای: mesoporous silica of ptl

تعداد نتایج: 21170156  

Journal: :Nano letters 2009
Timo Lebold Christophe Jung Jens Michaelis Christoph Bräuchle

We apply mesoporous thin silica films with nanometer-sized pores as drug carriers and incorporate the widely used anticancer drug Doxorubicin. Through single-molecule based measurements, we gain mechanistic insights into the drug diffusion inside the mesoporous film, which governs the drug-delivery at the target-site. Drug dynamics inside the nanopores is controlled by pore size and surface mod...

Journal: :Journal of the American Chemical Society 2004
Bozhi Tian Xiaoying Liu Leonid A Solovyov Zheng Liu Haifeng Yang Zhendong Zhang Songhai Xie Fuqiang Zhang Bo Tu Chengzhong Yu Osamu Terasaki Dongyuan Zhao

In this paper, we bring forward an effective strategy, solvothermal postsynthesis, to prepare ordered mesoporous silica materials with highly branched channels. Structural characterizations indicate that the titled mesoporous materials basically have the cubic double gyroidal (space group Ia-3d) structure with small fraction of distortions. The mesopore sizes and surface areas can be up to 8.8 ...

Journal: :Exploration 2023

Mesoporous silica-based nanoparticles, including silica, organosilica and metal doped silica have widespread applications in biomedical applications. This review summarizes the of mesoporous nanoparticles field cancer immunotherapy. Strategies to regulate tumour microenvironment for immune activation are presented by highlighting structural compositional attributes nanoparticles.

Journal: :Chemistry 2012
Keiichi Miyasaka Hiroko Hano Yoshiki Kubota Yangzheng Lin Ryong Ryoo Masaki Takata Susumu Kitagawa Alexander V Neimark Osamu Terasaki

We present a modeling scheme to analyze cagelike silica mesoporous crystals based on in situ X-ray diffraction (XRD) data collected during gas adsorption-desorption (physisorption) processes. Nitrogen physisorption on a silica mesoporous crystal of SBA-16 was directly monitored by using synchrotron in situ powder XRD measurements conducted at SPring-8. SBA-16 is a well-ordered mesoporous silica...

In this study, Santa Barbara Amorphous (SBA-15) mesoporous silica has been functionalized with aminopropyl groups that were converted to propargyl-bearing moieties through the reaction with propargyl bromide. The material then underwent an efficient Cu(I)-catalyzed azide alkyne click reaction with sodium azide in order to obtain the corresponding triazole products. The covalent modification of ...

Journal: :Chemical communications 2010
Nobuaki Ikawa Mitsuhiko Yamada Atsushi Miyaki Akira Endo

High-resolution scanning electron microscopy (HR-SEM) with backscattered electrons (BSE) under a low accelerating voltage provided images with compositional information about Pt nano-particles with a diameter of approximately 6 nm that were dispersed in mesoporous silica (SBA-15). The dispersion of Pt nano-particles in mesoporous silica was investigated using the BSE imaging method in combinati...

Journal: :Journal of the American Chemical Society 2011
Vasiliki Lykourinou Yao Chen Xi-Sen Wang Le Meng Tran Hoang Li-June Ming Ronald L Musselman Shengqian Ma

Microperoxidase-11 has for the first time been successfully immobilized into a mesoporous metal-organic framework (MOF) consisting of nanoscopic cages and it demonstrates superior enzymatic catalysis performances compared to its mesoporous silica counterpart.

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2017
Ryuichi Ohta Yuko Ueno Katsuhiro Ajito

The Raman spectroscopy of pharmaceutical cocrystals based on caffeine and oxalic acid in nanosized pores of mesoporous silica has been demonstrated at various molar amounts. The Raman peak shifts of caffeine molecules express the existence of pharmaceutical cocrystals in mesoporous silica. The molar amount dependence of the peak shifts describes that caffeine and oxalic acid cocrystallized on t...

In this study, Santa Barbara Amorphous (SBA-15) mesoporous silica has been functionalized with aminopropyl groups that were converted to propargyl-bearing moieties through the reaction with propargyl bromide. The material then underwent an efficient Cu(I)-catalyzed azide alkyne click reaction with sodium azide in order to obtain the corresponding triazole products. The covalent modification of ...

2013
Hatem M Alsyouri Malyuba A Abu-Daabes Ayah Alassali Jerry YS Lin

Acidic interfacial growth can provide a number of industrially important mesoporous silica morphologies including fibers, spheres, and other rich shapes. Studying the reaction chemistry under quiescent (no mixing) conditions is important for understanding and for the production of the desired shapes. The focus of this work is to understand the effect of a number of previously untested condition...

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