نتایج جستجو برای: shape mesoporous ncsm

تعداد نتایج: 200293  

Journal: :Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2013
Ana S Rodrigues Tânia Ribeiro Fábio Fernandes José Paulo S Farinha Carlos Baleizão

In this paper we describe the preparation of fluorescent mesoporous silica nanoparticles (MSNs) for traceable drug delivery systems. The nanoparticles were prepared following a sol-gel procedure, incorporating a modified perylenediimide dye in the silica structure. Transmission electron microscopy and scanning electron microscopy show that the nanoparticles are monodispersed, with a spheroid sh...

2016
Jonas G. Croissant Christian Qi Marie Maynadier Xavier Cattoën Michel Wong Chi Man Laurence Raehm Olivier Mongin Mireille Blanchard-Desce Marcel Garcia Magali Gary-Bobo Jean-Olivier Durand

Three dimensional sub-micron resolution has made two-photon nanomedicine a very promising medical tool for cancer treatment since current techniques cause significant side effects for lack of spatial selectivity. Two-photon-excited (TPE) photodynamic therapy (PDT) has been achieved via mesoporous nanoscaffolds, but the efficiency of the treatment could still be improved. Herein, we demonstrate ...

Journal: :Physical Review C 2023

Background: Deuteron-induced nuclear reactions are an essential tool for probing the structure of nuclei as well astrophysical information such $(n,\ensuremath{\gamma})$ cross sections. The deuteron-nucleus system is typically described within a Faddeev three-body model consisting neutron ($n$), proton ($p$), and target nucleus ($A$) interacting through pairwise phenomenological potentials. Whi...

Journal: :Chemical communications 2014
Changlong Xiao Xunyu Lu Chuan Zhao

Fe and Ni doped mesoporous Co3O4 (mCo3O4) catalysts were prepared and investigated for electrochemical oxygen evolution. The incorporation of Fe into mCo3O4 (Fe-mCo3O4) results in unusual synergistic effects via destruction of the bulk mesoporous structure and formation of slit-like pores. The Fe-mCo3O4 composite displayed a significantly enhanced catalytic activity for oxygen evolution.

2004
Yasuhiro Sakamoto Tae-Wan Kim Ryong Ryoo Osamu Terasaki

Large-pore three-dimensional (3D) mesoporous silicas are among the most interesting mesoporous materials discovered in recent years, and they have attracted much attention for potential applications requiring easily accessible, uniform, large pores. Examples of these are SBA-15 (p6mm) and SBA16 (Im3̄m), which have cylindricaland cage-type structures, respectively. It has been reported that hexag...

2011
Tina Ukmar Albin Pintar

We present clear evidence that the global (macroscopic) transport from/to mesoporous materials is significantly affected by the interactions between the mesoporous host and the guest molecules. The problem is considered in a most general way so the solutions apply for a variety of cases such as the release of a guest from porous matrices, catalysis occurring in porous materials or processes tak...

2016
James P. Vary Pieter Maris Hugh Potter Mark A. Caprio Robin Smith Sven Binder Sebastian Fischer Joachim Langhammer Robert Roth Hasan Metin Aktulga Esmond Ng Chao Yang Dossay Oryspayev Masha Sosonkina Erik Saule Ümit Çatalyürek

There has been significant recent progress in solving the long-standing problems of how nuclear shell structure and collective motion emerge from underlying microscopic inter-nucleon interactions. We review a selection of recent significant results within the ab initio No Core Shell Model (NCSM) closely tied to three major factors enabling this progress: (1) improved nuclear interactions that a...

2012
Andreza de Sousa Karynne Cristina de Souza Nelcy D. S. Mohallem Ricardo Geraldo de Sousa

In the last decade, significant research efforts were devoted to obtaining materials with welldefined nanostructures for a wide range of applications (Hamley, 2003; Soler-Illia et al., 2002; Paul & Sharma, 2006). Mesoporous silica materials like M41S, HMS, SBAn, FSM, and MSU, among others, are a fairly new type of material that has pores in the mesoscopic range of 2–50 nm (Wan et al., 2007). Th...

Journal: :Chemical communications 2015
Teng-Hao Chen Ilya Popov Yu-Chun Chuang Yu-Sheng Chen Ognjen Š Miljanić

A mesoporous Zn-based metal-organic framework (MOF) was prepared from a shape-persistent phenylene ethynylene macrocycle functionalized with three -COOH groups. The rigid ligand has a ∼9 Å wide central cavity which serves as a predesigned pore. The macrocycles [π···π] stack into pairs, with their carboxylate groups connected via three Zn3O14C6H2 clusters. The resulting MOF has a void volume of ...

Journal: :Frontiers in Marine Science 2021

One of today’s greatest conservation challenges is balancing policies, laws, and management strategies established to achieve economic goals that depend on extracting ocean resources with those conserve marine biodiversity. We use the Northeast Canyons Seamounts Marine National Monument (NCSM) as a case study explore consequences changing from policy prevents fishing fisheries policy. found ope...

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