نتایج جستجو برای: nanostructure silica

تعداد نتایج: 43429  

Journal: :journal of ultrafine grained and nanostructured materials 2014
ahmad keyvani mohsen saremi mahmoud heydarzadeh sohi

conventional and nanostructured ysz coatings were deposited on the in-738 ni super alloy by the atmospheric plasma spray technique. the oxidation was measured at 1100°c in an atmospheric electrical furnace. according to the experimental results the nanostructured coatings showed a better oxidation resistance than the conventional ones. the improved oxidation resistance of the nanocoating could ...

Journal: :Nanoscale 2015
Hyein Yoo Ho Seong Jang Kwangyeol Lee Kyoungja Woo

Although the quantum efficiencies of quantum dots (QDs) are approaching unity through advances in the synthesis of QD materials, their luminescence efficiencies after mixing with resin and thermal curing for white light-emitting diodes (LEDs) are seriously lowered because of aggregation and oxidation of QDs and poor adhesion of QDs to the resin. To overcome these problems, QD-layer-encapsulated...

Journal: :Nanomedicine : nanotechnology, biology, and medicine 2010
Wassana Yantasee Glen E Fryxell George A Porter Kanda Pattamakomsan Vichaya Sukwarotwat Wilaiwan Chouyyok View Koonsiripaiboon Jide Xu Kenneth N Raymond

UNLABELLED Many forms of organocomplexed gadolinium (Gd) contrast agents have recently been linked to a debilitating and a potentially fatal skin disease called nephrogenic systemic fibrosis (NSF) in patients with renal failure. Free Gd released from these complexes via transmetallation is believed to be the most important trigger for NSF. In this work, nanostructure silica materials that have ...

Journal: :Journal of the American Chemical Society 2013
Sumedh P Surwade Feng Zhou Bryan Wei Wei Sun Anna Powell Christina O'Donnell Peng Yin Haitao Liu

We describe a method to form custom-shaped inorganic oxide nanostructures by using DNA nanostructure templates. We show that a DNA nanostructure can modulate the rate of chemical vapor deposition of SiO2 and TiO2 with nanometer-scale spatial resolution. The resulting oxide nanostructure inherits its shape from the DNA template. This method generates both positive-tone and negative-tone patterns...

2016
Pedro M. Resende Ruy Sanz Alejandra Ruiz-de Clavijo Olga Caballero-Calero Marisol Martin-Gonzalez

The synthesis of a conformal three-dimensional nanostructure based on porous anodic alumina with transversal nanopores on wires is herein presented. The resulting three-dimensional network exhibits the same nanostructure as that obtained on planar geometries, but with a macroscopic cylindrical geometry. The morphological analysis of the nanostructure revealed the effects of the initial defects ...

Journal: :Arteriosclerosis, thrombosis, and vascular biology 2012
Christelle Yeromonahos Raphaël Marlu Benoît Polack Francois Caton

OBJECTIVE Because of the widespread clinical use of heparins, their effects on the enzymatic cascade are very well known. In contrast, little is known about the direct effect of heparins on the nanostructure of fibrin fibers, even though this nanostructure plays a major role in the mechanical strength and lysis of clots. This lack of reliable data can be correlated with the lack of a nonintrusi...

2008
M. Zergoug

Milling time is one of the most important factors for achieving the desired particle size of milled powders. Generally, the particle size of milled powders decreases with increasing milling time. However, long milling time results in agglomeration of small particles for some powders [9]. The using of the NDT method gives lot information about these microstructures in particular the magnetic NDT...

Journal: :Journal of biomaterials science. Polymer edition 2007
Balaji Sitharaman Xinfeng Shi Lesa A Tran Patrick P Spicer Irene Rusakova Lon J Wilson Antonios G Mikos

This study investigates the effects of nanostructure size and surface area on the rheological properties of un-cross-linked poly(propylene fumarate) (PPF) nanocomposites and the mechanical properties of cross-linked nanocomposites as a function of the nanostructure loading. Three model carbon nanostructures were examined, C(60) fullerenes, ultra-short single-walled carbon nanotubes (US-tubes) a...

Journal: :Physical chemistry chemical physics : PCCP 2015
Aaron Elbourne Samuel Cronshaw Kislon Voïtchovsky Gregory G Warr Rob Atkin

In situ amplitude modulated-atomic force microscopy (AM-AFM) has been used to probe the nanostructure of mixtures of propylammonium nitrate (PAN) with n-alkanols near a mica surface. PAN is a protic ionic liquid (IL) which has a bicontinuous sponge-like nanostructure of polar and apolar domains in the bulk, which becomes flatter near a solid surface. Mixtures of PAN with 1-butanol, 1-octanol, a...

Journal: :Nanotechnology 2012
James Loomis Balaji Panchapakesan

This paper reports dimensional dependence of the mechanical response in carbon nanostructure composites to near-infrared (NIR) light. Using polydimethylsiloxane, a common silicone elastomer, composites were fabricated with one-dimensional multi-wall carbon nanotubes (MWNTs), two-dimensional single-layer graphene, two-and-a-half-dimensional graphene nanoplatelets and three-dimensional highly ord...

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