Materials Literature
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Bimagnetic FePt/CoFe 2 O 4 nanoparticles having a bricklike morphology were synthesized by growing a soft magnetic CoFe 2 O 4 phase on FePt cubic nanoparticle seeds. The size of the soft phase could be controlled by tuning the material ratio of the FePt seeds to the CoFe 2 O 4 component. To obtain magnetic hardening,…
The beneficial entropic effect, which may be expected from the connection of three tridentate binding units to a strain-free covalent tripod for complexing nine-coordinate cations (Mz+ = Ca2+, La3+, Eu3+, Lu3+), is quantitatively analyzed by using a simple thermodynamic additive model. The switch from pure intermolecu…
This paper reports the synthesis of alkali-free layered nickel oxides with a highly swollen hydrate structure, derived from NaNiO 2 through soft-chemical processes involving oxidation with bromine and subsequent acid treatment. Complete removal of interlayer Na + ions and subsequent hydration yielded a single phase of…
Gold nanoparticles in the range of 5−6 nm were synthesized by the reduction of gold(III) chloride trihydrate by sodium borohydride (SBH) in the presence of newly synthesized mono-6-deoxy-6-pyridinium-β-cyclodextrin chloride (p-βCD). NMR, mass spectroscopy, and UV−vis spectroscopy illustrated that SBH would simultaneou…
The LaFe(13)-(x)Si(x) (1.0 < or = x < or = 5.0) series is studied experimentally and theoretically to gain possible understanding for the relationships among geometrical structure, chemical composition, magnetic behavior, and physical properties as related to the magnetocaloric effect in these compounds. As the Si con…
Gold nanoparticles functionalized with chromophores are known to present unpredictable fluorescence as a function of their structure. Odd-even effects, based on the number of methylene units of the chain to which the fluorophore is attached, and the nature of the anchoring group on the gold surface have, in the past,…
In this paper, we have prepared of a topography/chemical composition gradient polystyrene (PS) surface, i.e., an orthogonal gradient surface, to investigate the relationship between surface wettability and surface structure and chemical composition. The prepared surface shows a one-dimensional gradient in wettability…
Using a genetic algorithm global optimization approach combined with density functional theory calculations, a search has been made for the lowest energies of (AgAu)(m) nanoalloys with 20-150 atoms (diameters of 1.0-2.0 nm). A total of 31 decahedra, 35 icosahedra, and 2 close-packed motifs are identified in two icosah…
In this article, modification of mercerized flax (MFx) through graft co-polymerization with methylmethacrylate (MMA) using ferrous ammonium sulphate–potassium per sulphate (FAS–KPS) redox initiator has been reported. Water uptake and moisture absorbance properties of methylmethacrylate grafted mercerized flax (MFx-g-M…
A model of spin torque induced magnetization dynamics based upon semi-classical spin diffusion theory for a single layer nanocontact is presented. The model incorporates effects due to the current induced Oersted field and predicts the generation of a variety of spatially dependent, coherent, precessional magnetic wav…
We report an ammonia-evaporation-induced synthetic method for metal (Ni, Cu, Zn, and Cd) hydroxide/oxide nanostructures including hierarchical CuO spheres with radiating nanoplates, densely branched ZnO nanowires, Cd(OH) 2 nanofibers, and Ni(OH) 2 nanoplates. One important feature of this mild and surfactant-free meth…
Ensemble and single-molecule spectroscopy demonstrates that both emission and absorption of peridinin-chlorophyll-protein photosynthetic antennae can be largely enhanced through plasmonic interactions. We find up to 18-fold increase of the chlorophyll fluorescence for complexes placed near a silver metal layer. This e…
We investigate Raman spectra of graphite oxide and functionalized graphene sheets with epoxy and hydroxyl groups and Stone-Wales and 5-8-5 defects by first-principles calculations to interpret our experimental results. Only the alternating pattern of single-double carbon bonds within the sp2 carbon ribbons provides a…
Lead is a material of fundamental scientific interest because of its relatively low melting point and ductility. Alloys of lead are used for practical reasons which include the desire to have a slightly harder form of the metal to be able to handle without damage. A practical question is how lead and alloys with small…
At ambient conditions Be and Mg have hcp structure with non‐ideal c/a ratio. This does not allow using the simple, spherically symmetric potential in MD simulations. The Modified Embedded Atom Model (MEAM) accounting for local environment and angular forces has been applied to MD simulation of thermodynamic and mechan…
Abstract Hexaalkoxy‐substituted azamacrocyclic metal complexes 1 · MX n [MX n = FeCl 3 , CuCl 2 , SrCl 2 , Ln(NO 3 ) 3 ; Ln = La, Pr, Eu, Ho, Er] with various chain lengths were prepared by a convergent approach using 1,2‐bisalkoxy‐4,5‐diamines 3 and 4‐alkoxy‐pyridine‐2,6‐dicarbaldehydes 4 as key building blocks for t…
A particular characteristic of an explosively produced weld is that the profile of the weld interface often has a regular wavy appearance. Effects of detached shock wave and jetting on the metal interface of explosive welding has been considered by SPH. Numerical results show wavy interface which is observed in severa…
This paper presents results on the dynamics of damage in copper under incipient spall conditions for multicrystalline specimens. Specimens were annealed from polycrystalline material to reduce the number of grain boundaries the shock wave traverses in passing through the specimen. The specimens incorporated unique fid…
Abstract Carboxylated styrene‐butadiene (SB) composites reinforced by a mixture of defatted soy flour (DSF) and carbon black (CB) were investigated in terms of their dynamic mechanical properties. DSF is an abundant renewable commodity and has a lower cost than CB. DSF contains soy protein, carbohydrate, and whey. Aqu…
Study on the effect of concentration of maleated polypropylene (MAPP), dicumyl peroxide (DCP), nanoclay (NC), and aspen fiber loading on the mechanical properties of Aspen—PP composites has been undertaken with the objective to protect or increase the impact strength without losing or weakening the tensile strength. T…