Materials Literature
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The stable suspension of single-nano diamond particles has eluded researchers due to persistent agglomeration during purification. Presented here are results of simulations revealing that the aggregation behavior observed in samples of colloidal nanodiamond is due to strong Coulombic interactions, that depend upon the…
The acute in vivo toxicity of para-35S-sulfonato-calix[4]arene has been determined, with no toxicity for doses up to 100 mg kg−1. Biodistribution shows that the molecule is rapidly cleared in urine, that it does not accumulate in the liver and spleen, and is not observed in the brain.
The technique for fabrication of hollow multilayer microcapsules is initially established by layer-by-layer (LbL) assembly of oppositely charged polyelectrolytes onto sacrificial colloidal particles followed by core removal. It has the advantages of precise control over the size, shape, composition, wall thickness and…
We have employed the polyol method to synthesize copper(I) oxide (Cu2O) nanostructures with well-defined shapes and in large quantities. Transmission electron microscopy and X-ray powder diffraction studies show that polycrystalline colloidal spheres could be prepared in high yields by simply reducing copper nitrate w…
We consider a novel method of cloaking objects from the surrounding electromagnetic fields in the microwave region. The method is based on transmission-line networks that simulate the wave propagation in the medium surrounding the cloaked object. The electromagnetic fields from the surrounding medium are coupled into…
This review article highlights the recent progress made in the design and study of self-assembled supramolecular architectures based on tetrapyrrole macrocycles as donors, and fullerene and carbon nanotubes as electron acceptors for electron and energy transfer applications in solution. The remarkable features of the…
Recent developments of superhydrophobic materials in which fibrous structure plays a critical role are reviewed. The role of the fibers with diameters on the length scale of nanometers to micrometers to create a surface of suitable topography is emphasized. Superhydrophobic fibrous materials are first illustrated by a…
The effect of substitution for on the crystal chemistry, oxygen content, thermal expansion, electrical conductivity, and catalytic activity for oxygen reduction reaction (ORR) of the double perovskite oxides has been investigated for . The system exhibits a structural change from orthorhombic to tetragonal to orthorho…
Three dimensionally ordered macroporous (3DOM) carbons with mesoporous walls were prepared by a colloidal crystal templating method. A three dimensionally ordered composite consisting of monodisperse polystyrene (PS) latex (100–450 nm) and colloidal silica (5–50 nm) was prepared by an evaporation process of suspension…
High Resolution Image Download MS PowerPoint Slide The use of conjugated organic compounds in fluorescence sensing applications has been demonstrated to provide an impressive method to detect energetic nitro-aromatic compounds. The amplified fluorescence quenching in conjugated polymers was used for trace detection of…
In this study, we devised a simple method to enhance the conductivity of poly(3,4-ethylenedioxythiophene)-poly(styrene-sulfonate) (PEDOT:PSS) films through spin-coating with various surface-modified compounds, and then applied this technique to the preparation of ITO-free polymer solar cells (PSCs). The electrical con…
An iron titanate catalyst with a crystallite phase, prepared by a co-precipitation method, showed excellent activity, stability, selectivity and SO(2)/H(2)O durability in the selective catalytic reduction of NO with NH(3) in the medium temperature range.
The electric field distribution of cable insulation systems under HVDC can be affected significantly at interfaces due to space charge build-up. In this article, the second part of a three-article series, face and space charge accumulation are analyzed first in terms of macroscopic physics, then through approximate ma…
The transport of oxygen in dense samples of yttria-stabilized zirconia (YSZ), of average grain size d ≈ 50 nm, has been studied by means of 18O/16O exchange annealing and secondary ion mass spectrometry (SIMS). Oxygen diffusion coefficients (D*) and oxygen surface exchange coefficients (k*) were measured for temperatu…
We report a two-step, solution-based synthetic method to fabricate CdS nanoparticles-sensitized ZnO nanowire heterostructure arrays which showed enhanced photocatalytic activities in comparison with bare ZnO nanowire arrays.
Tissue Engineering is a rapidly evolving field in terms of cell source and scaffold fabrication. As the template for three dimensional tissue growth, the scaffold should emulate the native extracellular matrix, which is nano-fibrous. Currently, there are three basic techniques capable of generating nano-fibrous scaffo…
Hollow mesoporous silica nanospheres (HMSNs) with tunable sizes of both sphere diameter (around 100 nm) and shell thickness have been successfully fabricated.
Gadolinium is widely employed as a contrast agent for magnetic resonance imaging (MRI) and has generally been considered to be safe. As with iodinated radiocontrast, concern for contrast-induced nephropathy existed with gadolinium-contrast as it possessed many similar qualities (hyperosmolar, renal excretion via glome…
Industrial nanoparticles are not developed to be compatible with in vitro cell culture assays which are carried out in isotonic solutions at physiological pH and often in the presence of proteins. The tendency of nanoparticles to deagglomerate or agglomerate is strongly sensitive to these parameters. The state of aggl…
Conceptual studies and numerical simulations are performed for imaging devices that transform a near-field pattern into magnified far-zone images and are based on high-order spatial transformation in cylindrical domains. A lens translating a near-field pattern from an almost circular input boundary onto a magnified fa…