Materials Literature
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This paper deals with the characterization of a green composite, made of flax fibers and a bio-derived furan resin. It is shown that the porosity within the composite, which is determined by various parameters, adversely influences the mechanical performance as well as the water absorption behavior of the material. Si…
The ground state of colloidal magnetic particles in a modulated channel are investigated as a function of the tilt angle of an applied magnetic field. The particles are confined by a parabolic potential in the transversal direction while in the axial direction a periodic substrate potential is present. By using Monte…
The solution of thin graphene-sheets obtained from a simple ultrasonic exfoliation process was found to chemically interact with [6,6]-phenyl C71 butyric acid methyl ester (PCBM) molecules. The thinner graphene-sheets have significantly altered the positions of highest occupied molecular orbital and lowest unoccupied…
Abstract N‐type zinc oxide (ZnO) and p‐type cuprous oxide (Cu 2 O) thin films were fabricated by an ultrasonic spray‐assisted mist chemical vapor deposition (mist CVD) method. The films of transparent conductive gallium‐doped ZnO (ZnO:Ga) and indium tin oxide (ITO) were also formed by the same technique. ZnO thin film…
When an applied magnetic field has an arbitrary direction with respect to the lattice axes of a periodically microstructured or nanostructured metamaterial, the effective permittivity tensor of the metamaterial sample becomes anisotropic and all its components can be nonzero. This is true even if the microstructure ha…
Tetragonal tungsten bronze (TTB) oxides are one of the most important classes of ferroelectrics. Many of these framework structures undergo ferroelastic transformations related to octahedron tilting deformations. Such tilting deformations are closely related to the rigid unit modes (RUMs). This paper discusses the who…
There are two modes by which clusters of aggregating particles can coalesce: The clusters can merge either (i) by the Ostwald ripening process, in which particles diffuse from one cluster to the other while the cluster centers remain stationary, or (ii) by means of a cluster translation mode, in which the clusters mov…
The amine functionalized CoFe₂O₄ nanoparticles were prepared by thermal decomposition method at reflux temperatures 160℃ and 172℃. The obtained CoFe₂O₄ nanoparticles at 160 °C reflux temperature show aggregation free poly-dispersed nanoparticles in 4-15 nm range. In an elevated reflux temperature of 172 ℃, CoFe₂O₄ sho…
By electrospinning method, fibers are produced with diameters ranging from hundred nanometers up to a few micrometers. In this study, the influence of ambient temperature and relative humidity on the morphology of electrospun polyetherimide (PEI) fibers at varying electrospinning parameters such as solution concentrat…
The magnetic, dielectric, and magnetoelectric properties are investigated in the polycrystalline Cr2WO6. Under zero magnetic fields, no dielectric anomaly and electric polarization are observed in this compound. After magnetoelectric annealing, the magnetic-field-induced dielectric and pyroelectric current peaks simul…
composed of amorphous or semicrystalline matrices and semicrystalline reinforcements were only considered
This article describes a model for hydrogen outgassing into a stainless steel vacuum chamber. It accounts for the geometry of the chamber components, the hydrogen dissolved in those components, and the processes of diffusion, recombination, and trapping. Strongly bound or “trapped” hydrogen, which occurs at heterogene…
A new face-centred-cubic phase is reported here in a metastable β-titanium alloy with an equilibrium α–β structure, formed due to solution treatment and ageing. The face-centred-cubic phase is located inside the close-packed-hexagonal α-phase and has an orientation relationship with α-phase. This new phase could be ob…
Click here for all previous articles in the History of the Ecological Sciences series by F. N. Egerton Limnology is unique among sciences in having one scientist name, define, and write the first monograph, first survey, and first textbook of that science (Egerton 1962). Before Forel formally founded limnology, natura…
The morphology and crystal growth of devitrite crystals nucleated heterogeneously on glass surfaces have been studied. The crystals grow as fans of needles, with each needle having a characteristic [100] growth direction with respect to the centrosymmetric triclinic unit cell. An analysis of crystal growth data report…
Abstract By performing density functional theory calculations, we studied the quantum confinement in charged graphene quantum dots (GQDs), which is found to be clearly edge and shape dependent. It is found that the excess charges have a large distribution at the edges of the GQD. The resulting energy spectrum shift is…
This research encompasses the study of testing protocols and the design of sensors for evaluating the compressive strength of the char layer of ablative material used in solid rocket motors (SRMs). The testing protocol that has been developed is the continuation of previous work for determining the compressive strengt…
Self‐healing cyanate ester resins (CE) were developed by adding low molecular weight poly(phenylene oxide) (PPO) resin, yielding a high performance CE/PPO system via a low‐temperature process. The addition of PPO improved the flexural strength and fracture toughness of the CE matrix without sacrificing thermal propert…
Examples are presented of three new methods for preparing electromagnetic (EM) textiles for a variety of applications. These are metalized textiles containing pores and meshes, textiles with planar periodic structures, and space-structured textiles. Firstly, an aluminum foil model with pores was prepared, then metaliz…
As wide bandgap materials are nanostructured for optoelectronics and energy technologies, understanding how size and defects modify the carrier dynamics becomes critical. Here, we examine broadband ultraviolet-visible subpicosecond emission dynamics of prototypical ZnO in bulk, nanowire and nanosphere geometries. Usin…