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Simultaneous Reduction of Particulate Matter and NOx Emissions Using 4-Way Catalyzed Filtration Systems

Jacob Swanson、Winthrop F. Watts、Robert A. Newman 等 5 位作者2013-04-03Environmental Science & Technology

The next generation of diesel emission control devices includes 4-way catalyzed filtration systems (4WCFS) consisting of both NOx and diesel particulate matter (DPM) control. A methodology was developed to simultaneously evaluate the NOx and DPM control performance of miniature 4WCFS made from acicular mullite, an adv…

Air Quality and Health ImpactsCatalytic Processes in Materials ScienceAir Quality Monitoring and Forecasting

Role of Early-Stage Atmosphere in the Dehydrogenation Reaction of the LiBH4–YH3 Composite

Kee-Bum Kim、Jae‐Hyeok Shim、Kyu Hwan Oh 等 4 位作者2013-04-03The Journal of Physical Chemistry C

This article investigates the dehydrogenation behavior of the LiBH 4 –YH 3 composite under various early-stage Ar back-pressure conditions. It is clearly observed that a minute change in early-stage atmosphere greatly affects the overall dehydrogenation reaction of the composite. Free boron and Li 2 B 12 H 12 start to…

Hydrogen Storage and MaterialsSuperconducting Materials and ApplicationsSuperconductivity in MgB2 and Alloys

Study on the preparation of multi-walled carbon nanotube/phthalocyanine composites and their optical limiting effects

Lei Zhang、Haojie Yu、Lei Liu 等 4 位作者2013-04-03Journal of Composite Materials

In this article, multi-walled carbon nanotubes were noncovalently functionalized with different metal phthalocyanines by π–π stacking method. Multi-walled carbon nanotubes were dispersed by sonication into the phthalocyanines solution in chloroform or N, N-dimethyl formamide before refined purification by centrifugati…

Carbon Nanotubes in CompositesPorphyrin and Phthalocyanine ChemistryNonlinear Optical Materials Studies

Metal-induced charge transfer, structural distortion, and orbital order in SrTiO3thin films

Jaekwang Lee、Chungwei Lin、Alexander A. Demkov2013-04-03Physical Review B

The atomic and electronic properties of the Cs/SrTiO${}_{3}$ heterostructure are investigated using density functional theory. Our results suggest that an antiferrodistortive (AFD) or a ferroelectric (FE) like distortion could be induced in SrTiO${}_{3}$ (STO) by a Cs layer, depending on the interface bonding geometry…

Ferroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides

Anomalous superconducting state in LiFeAs implied by the 75 As Knight shift measurement

S-H Baek、Luminita Harnagea、S. Wurmehl 等 5 位作者2013-04-03Journal of Physics Condensed Matter

(75)As NMR investigation of a single crystal of superconducting LiFeAs is presented. The Knight shift and the in situ ac susceptibility measurements as a function of temperature and external field are indicative of two superconducting (SC) transition temperatures, each of which is associated with its own upper critica…

Physics of Superconductivity and MagnetismRare-earth and actinide compoundsIron-based superconductors research

Systematic study of photoluminescence, lyoluminescence and mechanoluminescence in Ce3+‐ and Eu3+‐activated Li3PO4 phosphors

Aastha Sahu、Bhushan P. Kore、P. S. Chowdhary 等 5 位作者2013-04-03Luminescence

Li3 PO4 phosphor was prepared using a modified solid-state diffusion technique. In this work, photoluminescence, lyoluminescence and mechanoluminescence studies were carried out in a Li3 PO4 microcrystalline powder doped with different rare earths. In photoluminescence studies, characteristic emission of Ce and Eu was…

Luminescence Properties of Advanced MaterialsOrganic Light-Emitting Diodes ResearchLuminescence and Fluorescent Materials

Beyond displays: The recent progress of liquid crystals for bio/chemical detections

Yuanchen Dong、Zhongqiang Yang2013-04-03Chinese Science Bulletin

Liquid crystals (LCs) are often known as electronic displays and have become ubiquitous in our daily life, apart from that, in the past 10 years, LCs have been investigated as exquisitely sensitive reporters for developing new molecular sensing and detection tools. The unique and primary advantage of this class of int…

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsAdvanced Materials and Mechanics

Bioinspired Self-Assembled Peptide Nanofibers with Thermostable Multivalent α-Helices

So-hee Han、Mun-kyung Lee、Yong‐beom Lim2013-04-03Biomacromolecules

The stabilization of peptide's active conformation is a critical determinant of its target binding efficiency. Here we present a structure-based self-assembly strategy for the design of nanostructures with multiple and thermostable α-helices using bioinspired peptide amphiphiles. The design principle was inspired by t…

Chemical Synthesis and AnalysisSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications

Magnetocaloric effect in the rare earth intermetallic compounds RCoNi (R = Gd, Tb, Dy, and Ho)

Rajib Mondal、R. Nirmala、J. Arout Chelvane 等 4 位作者2013-04-03Journal of Applied Physics

Magnetic and magnetocaloric properties of cubic Laves phase RCoNi (R = Gd, Tb, Dy, and Ho) compounds have been studied. The RCoNi (R = Gd, Tb, Dy, and Ho) compounds order ferromagnetically at ∼200 K, ∼113 K, ∼68 K, and ∼42 K (TC), respectively. Field dependent magnetization data of RCoNi at 5 K in fields up to 7 T rev…

Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsMagnetic Properties of Alloys

Radical Initiated Reactions on Biocompatible CdSe-Based Quantum Dots: Ligand Cross-Linking, Crystal Annealing, and Fluorescence Enhancement

Christian Schmidtke、Holger Lange、Huong Tran 等 9 位作者2013-04-03The Journal of Physical Chemistry C

Cross-linking of biocompatible ligand shells significantly improves the stability of nanocrystals in the biological environment. We report a detailed spectroscopic study of radical initiated reactions on poly(isoprene)- b -poly(ethelene glycol) encapsulated CdSe/CdS/ZnS core–shell–shell quantum dots. It was found that…

Quantum Dots Synthesis And PropertiesCarbon and Quantum Dots ApplicationsNanocluster Synthesis and Applications

Assessing the morphology of selective laser melted NiTi-scaffolds for a three-dimensional quantification of the one-way shape memory effect

Therese Bormann、Michael de Wild、Felix Beckmann 等 4 位作者2013-04-03Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

NiTi is promising for the use as bone scaffold, because the pseudoelasticity or the one- and two-way shape memory effect in the physiological window can mechanically stimulate the adherent cells. Such stimuli can enhance osseointegration and might reduce stress shielding associated with load bearing implants. The pres…

Shape Memory Alloy TransformationsLaser and Thermal Forming Techniques

Evaluation of in vitro and in vivo genotoxicity of single-walled carbon nanotubes

Jin Sik Kim、Kyung Seuk Song、Il Je Yu2013-04-03Toxicology and Industrial Health

Single-walled carbon nanotubes (SWCNTs) have extensive potential industrial applications due to their unique physical and chemical properties; yet this also increases the chance of human and environment exposure to SWCNTs. Due to the current lack of hazardous effect information on SWNCTs, a standardized genotoxicity b…

Carbon Nanotubes in CompositesNanoparticles: synthesis and applicationsCarcinogens and Genotoxicity Assessment

A simple probabilistic model of submicroscopic diatom morphogenesis

Lisa Willis、Eileen J. Cox、Thomas Duke2013-04-03Journal of The Royal Society Interface

Unicellular algae called diatoms morph biomineral compounds into tough exoskeletons via complex intracellular processes about which there is much to be learned. These exoskeletons feature a rich variety of structures from submicroscale to milliscale, many that have not been reproduced in vitro. In order to help unders…

Marine and coastal ecosystemsProtist diversity and phylogenyDiatoms and Algae Research

Effective Medium Theory for Kapitza Stratified Media: Diffractionless Propagation

Carlo Rizza、Alessandro Ciattoni2013-04-03Physical Review Letters

We show that in the presence of a rapidly modulated dielectric permittivity with a large modulation depth (Kapitza medium) a novel and robust regime of diffractionless electromagnetic propagation occurs. This happens when the mean value to depth ratio of the dielectric profile is comparable to the small ratio between…

Metamaterials and Metasurfaces ApplicationsElectromagnetic Scattering and AnalysisAdvanced Antenna and Metasurface Technologies

Improved Fluorescence of Carbon Dots Prepared from Bagasse under Alkaline Hydrothermal Conditions

Xiaojuan Liu、Ming‐Lin Guo、Juan Huang 等 4 位作者2013-04-03BioResources

A simple and effective route to improve the fluorescence of carbon dots is reported. A weak fluorescent solution was obtained by a diminution step to obtain tiny particles from bagasse-based carbonaceous blocks. This solution was subjected to hydrothermal treatment under alkaline conditions to improve its fluorescent…

Quantum Dots Synthesis And PropertiesCarbon and Quantum Dots ApplicationsNanocluster Synthesis and Applications

The Methods of Preparation of Ti-Ni-X Alloys and Their Forming

Radim Kocich、Ivo Szurman、Miroslav Kurs2013-04-03InTech eBooks

The continuous development of science and technology in all industrial sectors means connecting and usage of a wide range of new knowledge together with implementation of new modern technologies for production of materials with high functional, specific and special properties. Intermetallic compounds TiNi with shape-m…

Shape Memory Alloy TransformationsIntermetallics and Advanced Alloy PropertiesTitanium Alloys Microstructure and Properties

Structure and Transport Anomalies in Soft Colloids

Samanvaya Srivastava、Lynden A. Archer、Suresh Narayanan2013-04-03Physical Review Letters

Anomalous trends in nanoparticle correlation and motion are reported in soft nanoparticle suspensions using static and dynamic x-ray scattering measurements. Contrary to normal expectations, we find that particle-particle correlations decrease and particle dynamics become faster as volume fraction rises above a critic…

Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesTheoretical and Computational Physics

Active elastodynamic cloaking

Andrew N Norris、Feruza A Amirkulova、William J Parnell2013-04-03Mathematics and Mechanics of Solids

An active elastodynamic cloak destructively interferes with an incident time harmonic in-plane (coupled compressional/shear) elastic wave to produce zero total elastic field over a finite spatial region. A method is described which explicitly predicts the source amplitudes of the active field. For a given number of so…

Metamaterials and Metasurfaces ApplicationsAcoustic Wave Phenomena ResearchNonlinear Photonic Systems

The pit transition potential in the repassivation of aluminium alloys

Ilaria M. Comotti、Monica Trueba、S. Trasatti2013-04-03Surface and Interface Analysis

This paper reports a systematic investigation of corrosion in 0.6 mol/l NaCl of freshly polished 1050‐H24, 6082‐T6, 2024‐T3 and 7075‐T6 Al alloys by single‐cycle anodic polarization using different anodic current limits for scan reversal (i rev ). For all alloys but Al 1050‐H24, an inflection point was repeatedly iden…

Corrosion Behavior and InhibitionAluminum Alloy Microstructure PropertiesHydrogen embrittlement and corrosion behaviors in metals

Characterization of the energy flux toward the substrate during magnetron sputter deposition of ZnO thin films

Sven Bornholdt、N Itagaki、Keisuke Kuwahara 等 6 位作者2013-04-03Plasma Sources Science and Technology

The characterization of energy influxes from plasma to substrate during sputter deposition of ZnO films is presented and discussed. Measurements were carried out in a triple rf magnetron sputter deposition system using calorimetric probes in various Ar/N 2 and Ar/H 2 mixtures at typical substrate positions. By variati…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications