搜索结果: 31-45 共查到“理学 nanoparticles”相关记录91条 . 查询时间(0.078 秒)
Shifted loops and coercivity from field imprinted high energy barriers in ferritin and ferrihydrite nanoparticles
Shifted loops coercivity from field ferrihydrite nanoparticles
2010/11/25
We show that the coercive field in ferritin depends on the maximum magnetic field in a ysteresis loop and that coercivity and loop shifts depend both on the maximum and cooling fields. The time depend...
Critical behavior of ferromagnetic pure and random diluted nanoparticles with competing interactions: variational and Monte Carlo approaches
Critical behavior of ferromagnetic pure random diluted nanoparticles interactions: variational
2010/11/23
The magnetic properties and critical behavior of both ferromagnetic pure and metallic nanopar-
ticles having concurrently atomic disorder, dilution and competing interactions, are studied in the fram...
Magnetic nanoparticles with bulk-like properties
Magnetic nanoparticles bulk-like properties
2010/11/22
The magnetic behavior of Fe3−xO4 nanoparticles synthesized either by high-temperature decomposition of an organic iron precursor or low-temperature co-precipitation in aqueous conditions, is com...
Conduction of DNA molecules attached to a disconnected array of metallic Ga nanoparticles
Conduction of DNA molecules disconnected array of metallic Ga nanoparticles
2010/11/17
We have investigated the conduction over a wide range of temperature of DNA molecules deposited across slits etched through a few nanometers thick platinum lm. The slits are insulating before DNA d...
Nonmonotonic Evolution of the Blocking Temperature in Dispersions of Superparamagnetic Nanoparticles
Nonmonotonic Evolution of Blocking Temperature Superparamagnetic Nanoparticles
2010/11/22
We use a Monte Carlo approach to simulate the influence of the dipolar interaction on assemblies of monodisperse superparamagnetic γ-Fe2O3 nanoparticles. We have identified a critical concentration c*...
Pt-Decorated PdCo@Pd/C Core-Shell Nanoparticles with Enhanced Stability and Electrocatalytic Activity for Oxygen Reduction Reaction
Core-Shell Nanoparticles Enhanced Stability Electrocatalytic Activity Oxygen Reduction Reaction
2010/11/25
The high cost and scarcity of Pt pose serious problems for the widespread commercialization of fuel cell technologics.1 Recently, Pd-based cathode catalysts have attracted much attention because Pd po...
Interactions between sub-10 nm iron and cerium oxide nanoparticles and 3T3 fibroblasts : the role of the coating and aggregation state
Nanoparticle Magnetism Cell proliferation Cell viability Fibroblast Polyacrylic acid
2010/11/19
Recent nanotoxicity studies revealed that the physico-chemical characteristics of engineered nanomaterials play an important role in the interactions with living cells. Here, we report on the toxicity...
Synthesis and characterization of gold nanoparticles supported on zinc oxide via the deposition-precipitation method
Au nanoparticles ZnO nanorods deposition-precipitation
2010/10/19
Gold nanoparticles supported on zinc oxide nanoparticles were synthesized at several pH levels via the deposition-precipitation (DP) method. The effects of pH on gold loading, particle size, and parti...
Nanoparticles in boreal forest and coastal environment: a comparison of observations and implications of the nucleation mechanism
Nanoparticles boreal forest coastal environment the nucleation mechanism
2010/8/16
The detailed mechanism of secondary new particle formation in the atmosphere is still under debate. It is proposed that particle formation happens via activation of 1–2 nm atmospheric neutral molecula...
Atmospheric Nanoparticles Impact Health, Weather Prof Says
Atmospheric Nanoparticles Health Weather
2010/3/4
Nanoparticles are atmospheric materials so small that they can’t be seen with the naked eye, but they can very visibly affect both weather patterns and human health all over the world – and not in a g...
An aerosol chamber investigation of the heterogeneous ice nucleating potential of refractory nanoparticles
aerosol chamber heterogeneous ice nucleating potential refractory nanoparticles
2010/2/21
All samples were observed to initiate ice formation via the deposition mode at threshold ice super-saturations (RHithresh) ranging from 105% to 140% for temperatures below 220 K. Approximately 10% of ...
Spectrophotometric Determination of Cysteine with Gold Nanoparticles Stabilized with Single-stranded Oligonucleotides
Spectrophotometric Determination Cysteine Gold Nanoparticles Stabilized Single-stranded Oligonucleotides
2010/9/20
A sensitive and selective spectrophotometric detection method for cysteine has been established in this paper. The assay is based on the displacement of single-stranded oligonucleotide (ssDNA) adsorb...
Flame Atomic Absorption Spectrometric Determination of Palladium in Aqueous Samples after Preconcentration Using Nanoparticles of γ-Alumina Functionalized with Pyridine Groups
Flame Atomic Absorption Spectrometric Palladium Aqueous Samples Preconcentration Nanoparticles of γ-Alumina Functionalized Pyridine Groups
2010/9/20
A new solid phase, nanoparticles of alumina functionalized with pyridine groups, was synthesized and used for extraction and preconcentartion of palladium(II) ions from some water samples. The effects...
A study on the distribution of adsorbed nanoparticles
nanoparticle adsorption Monte Carlo simulation Yukawa potential
2009/7/31
We use Monte Carlo simulation to calculate the distributions of particles under adsorption force near planar and cylindrical surfaces, respectively. Both hard sphere interaction and repulsive Yukawa (...
Influence of Drying on the Characteristics of Zinc Oxide Nanoparticles
zinc oxide drying process nanoparticle
2010/7/5
The recent growth in the field of porous and nanometric materials prepared by non-conventional processes has stimulated the search of new applications of ZnO nanoparticulate. Zinc oxide is an interest...