نتایج جستجو برای: nanoporous structure

تعداد نتایج: 1572004  

2014
Fernanda de Paula do Desterro Márcia Soares Sader Glória Dulce de Almeida Soares Guaracilei Maciel Vidigal

bovine inorganic biomaterials and correlate them with the dissolution rate. Bio-Oss®, GenoxInorgânico®, and Bonefill® were examined using field emission gun scanning electron microscopy (FEG-SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), specific surface area (BET), calcium/phosphorous molar ratio and a dissolution assay. Bio-Oss® showed a microand nanoporous str...

2015
Sachar Ichilmann Kerstin Rücker Markus Haase Dirk Enke Martin Steinhart Longjian Xue

Evaporation of volatile liquids from nanoporous media with bicontinuous morphology and pore diameters of a few 10 nm is an ubiquitous process. For example, such drying processes occur during syntheses of nanoporous materials by sol-gel chemistry or by spinodal decomposition in the presence of solvents as well as during solution impregnation of nanoporous hosts with functional guests. It is comm...

2014
Shiuli Pujari-Palmer Thomas Lind Wei Xia Liping Tang Marjam Karlsson Ott

Nanotopographical features are found to have significant effects on bone behavior. In the present study, nanoporous aluminas with different pore sizes (20, 100 and 200 nm in diameter), were evaluated for their osteoinductive and drug eluting properties. W20-17 marrow stromal cells were seeded on nanoporous alumina with and without the addition of BMP-2. Although cell proliferation was not affec...

2010
Trinh D. Tran Christian M. Lastoskie Hirofumi Kanoh Katsumi Kaneko

Introduction Elastic layered metal-organic framework (ELM) adsorbents exhibit a flexible two-dimensional latent porous crystalline structure. ELMs undergo abrupt reversible gated sorption transitions from an empty collapsed structure to a filled expanded porous state through cooperative adsorption of guest molecules between layer planes. Gated adsorption has been observed for methane, nitrogen,...

Journal: :Science advances 2016
Chi Cheng Gengping Jiang Christopher J Garvey Yuanyuan Wang George P Simon Jefferson Z Liu Dan Li

Investigation of the transport properties of ions confined in nanoporous carbon is generally difficult because of the stochastic nature and distribution of multiscale complex and imperfect pore structures within the bulk material. We demonstrate a combined approach of experiment and simulation to describe the structure of complex layered graphene-based membranes, which allows their use as a uni...

Journal: :Molecules 2015
Ioana Fechete Jacques C Vedrine

This review summarizes the importance of nanoporous materials and their fascinating structural properties with respect to the catalytic and photocatalytic reduction of CO2 to methane, toward achieving a sustainable energy supply. The importance of catalysis as a bridge step for advanced energy systems and the associated environmental issues are stressed. A deep understanding of the fundamentals...

Journal: :Nature communications 2014
Pintu K Kundu Gregory L Olsen Vladimir Kiss Rafal Klajn

Nanoporous frameworks are polymeric materials built from rigid molecules, which give rise to their nanoporous structures with applications in gas sorption and storage, catalysis and others. Conceptually new applications could emerge, should these beneficial properties be manipulated by external stimuli in a reversible manner. One approach to render nanoporous frameworks responsive to external s...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2008
S O Kucheyev J Biener T F Baumann Y M Wang A V Hamza Z Li D K Lee R G Gordon

Atomic layer deposition (ALD) appears to be uniquely suited for coating substrates with ultrahigh aspect ratios (> or similar 10(3)), including nanoporous solids. Here, we study the ALD of Cu and Cu3N on the inner surfaces of low-density nanoporous silica aerogel monoliths. Results show that Cu depth profiles in nanoporous monoliths are limited not only by Knudsen diffusion of heavier precursor...

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