Materials Literature
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Magnetic nanoparticles (MNPs) of Fe(3)O(4) have been widely applied in many medical fields, but few studies have clearly shown the outcome of particles following intravenous injection. We performed a magnetic examination using scanning SQUID biosusceptometry (SSB). Based on the results of SSB analysis and those of est…
TiO 2 (110)-supported small Pd (≤25 atoms) nanoparticles have been found capable of catalyzing CO oxidation. In the present article, the structure and activity toward CO of a small Pd 7 cluster supported on TiO 2 (110) support were examined using density functional theory (DFT). Our results show that using TiO 2 (110)…
This paper is focused on the study of acoustic metasurface cloaking, based on the use of appropriate ultrathin pseudosurfaces that may act as cloaking devices for a finite range of frequencies. The technique consists in tailoring the appropriate acoustic surface impedance which cancels the scattered field of a diffrac…
To study the influence of structure peculiarities of porphyrin derivatives on their supramolecular organization in thin films, 15 new meso-substituted tetraphenylporphyrin derivatives and their metal complexes with substituents (-OC(4)H(9) or -OC(16)H(33)) in para or ortho positions were studied. The films of the stud…
We present compelling theoretical results showing that fused azulene molecules are strong candidates for exhibiting room temperature multiferroic behavior, i.e., having both ferroelectric and ferromagnetic properties. If this is experimentally proved, these systems will be organic multiferroic materials with important…
The monodisperse metal sulfide (Ag2S, CdS, PbS, ZnS, and AgInS2) yolk–shell nanoboxes with sizes of about 220 nm were synthesized through a sacrificial template-directed method based on the Kirkendall effect. In a typical synthetic process for nanoboxes, there were two steps of ion-exchange. The first anion exchange w…
Aliphatic polyesters, like PGA, PLA, PCL and PDO, among others, are biodegradable materials that find applications in many biomedical devices, from fibers for subcutaneous sutures to other regenerative surgery implants. The main concept among these applications is to use a biodegradable device that temporarily replace…
Here we use the Time-Dependent Ginzburg–Landau (TDGL) mesoscopic model to simulate the phase transition process of macromolecule microsphere composite (MMC) hydrogel. We propose a free energy for such a reticular structure according to the structures of MMC hydrogel and entropy theory. This work generalizes the mean f…
Various graphene quantum dots (GQDs) embedded in a hexagonal BN sheet were studied theoretically using the tight binding model. The effective mass was analyzed as a function of the distance between neighboring GQDs. It was found that the effective mass increases exponentially as the distance increases, indicating that…
Plasma polymer thin films are of great interest in surface engineering in a wide range of applications. Herein, by using soft atmospheric plasma deposition parameters and by adapting these conditions to the used perfluorodecyl and dodecyl acrylates precursors, it is possible to get a high retention of monomer function…
The highly sensitive and molecule-specific technique of surface-enhanced Raman spectroscopy (SERS) generates high signal enhancements via localized optical fields on nanoscale metallic materials, which can be tuned by manipulation of the surface roughness and architecture on the submicrometer level. We investigate gol…
The excitation of surface plasmons on an elliptical grating followed by the transmission through a subwavelength aperture can modify the polarization state of the incoming light. The combined effect of the elliptical grooves and a slightly elliptical central hole allows to fully control the birefringence and retardati…
Correlated evolution of traits can act synergistically to facilitate organism function. But, what happens when constraints exist on the evolvability of some traits, but not others? The orb web was a key innovation in the origin of >12,000 species of spiders. Orb evolution hinged upon the origin of novel spinning behav…
Supramolecular nanostructures based on self-assembly processes have received considerable attention because these structures can lead to dynamic nanomaterials. Among the diverse self-assembled nanostructures, toroids are interesting nanostructures with the potential for many applications such as channel formation beca…
This study describes the first example of the investigation of electronic, geometric, and catalytic properties of Pd subnano metal clusters of Pd(4), Pd(8), and Pd(16) stabilized by poly(propylene imine) (PPI) dendrimers using XAFS and IR analyses. The relations among these properties are also discussed.
We report on a family of electrospun nanocomposites, which are capable of altering their stiffness upon hydration. An electrospun mat of poly(vinyl alcohol) (PVA) was incorporated as the filler in a polymeric matrix consisting of either poly(vinyl acetate) (PVAc) or ethylene oxide–epicholorohydrin copolymer (EO–EPI).…
We report on the topographical and electrical characterisations of 1 nm thick Al2O3 dielectric films on graphene. The Al2O3 is grown by sputtering a 0.6 nm Al layer on graphene and subsequentially oxidizing it in an O2 atmosphere. The Al2O3 layer presents no pinholes and is homogeneous enough to act as a tunnel barrie…
This work aims to obtain plasma thin film composites with hydrophobic/hydrophilic alternated regions, which are useful for the production of miniaturized mixers. These regions were acquired by two different strategies: either the codeposition of TEOS and HFE plasma thin films or the exposition of TEOS plasma films to…
We present occurrence of the effective Bragg conditions with wide gapwidth and high reflectance in a Fibonacci superlattice, which is a typical one-dimensional quasicrystal. In the Fibonacci material, the number of effective Bragg conditions is two rather than one which appears in traditional periodic structures. Base…
Cubic phase gadolinium oxide nanoparticles were prepared by hydrothermal method at various reaction temperatures like 60 °C, 120 °C, 180 °C and 240 °C. X-ray Diffraction (XRD) studies confirmed the formation of cubic phase Gd2O3. The broadening of XRD peak, due to crystallite size was investigated with the aid of gaus…