Materials Literature
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Single crystalline vanadium dioxide (VO${}_{2}$) nanobeams offer an ideal material basis for exploring the widely observed insulator--metal transition in strongly correlated materials. Here, we investigate nonequilibrium carrier dynamics and electronic structure in single crystalline VO${}_{2}$ nanobeam devices using…
Interdisciplinary: The application of protein-engineering techniques to polymer materials can lead to the design and preparation of biocompatible, biodegradable, stimuli-sensitive copolymers bearing biologically responsive peptide motifs (see picture).
In a multilayered structure of absorptive optical recording media, continuous-wave laser operation is highly disadvantageous due to heavy beam extinction. For a gold nanorod based recording medium, the narrow surface plasmon resonance (SPR) profile of gold nanorods enables the variation of extinction through mulilayer…
Epitaxial Ag(001) layers were deposited on MgO(001) in order to study electron surface scattering. X-ray reflection indicates 3D layer nucleation with a high rms surface roughness of 1.0 nm for a layer thickness d = 3.5 nm. X-ray diffraction shows that {111} twins form at d < 11 nm, followed by 2nd generation t…
The effect of grain size and temperature on the mechanical behavior of nano-polycrystal magnesium under tensile load is investigated using molecular dynamics simulation. The results indicate that the average flow stress of nano-polycrystal magnesium decreases with decreasing grain size, exhibiting a breakdown in the H…
A series of peptide-based triblock copolymers consisting of poly(γ-benzyl- l -glutamate)- b -poly(dimethylsiloxane)- b -poly(γ-benzyl- l -glutamate) [PBLG- b -PDMS- b -PBLG] were synthesized using ring-opening polymerization (ROP). The chemical structure and degree of polymerizations were evaluated by 1 H NMR. These t…
In the present study, the influence of diamond nanoparticles (DNPs) on dielectric properties of nematic liquid crystal (LC) E7 from Merck has been considered. It is established that the insertion of DNPs leads to an increase in the dielectric constant ε', as well as to a significant change in the electric conductivity…
Cadmium sulfide (CdS) nanofilms have been deposited on the glass substrate using the chemical bath technique. Cadmium chloride and thiourea have been used as Cd2+ and S2− ion sources with ammonia as a complexing agent in the presence of a nonionic surfactant. The deposited films have been annealed in air at 373 K, 473…
This review describes the state-of-the-art of material derived from the forest sector with respect to its potential for use in the packaging industry. Some innovative approaches are highlighted. The aim is to cover recent developments and key challenges for successful introduction of renewable materials in the packagi…
We report a large unusual exchange bias effect occurred after zero-field cooling from an unmagnetized state (ZEB) in Ni-Mn-Sn alloys, in which the maximum ZEB field is about twice as large as that observed in Ni-Mn-In alloys at moderate field range (< 40 kOe). The ZEB field can be tuned by tuning the magnitude…
The photoluminescence properties of Pr-doped K0.5Na0.5NbO3 (KNN) ceramics were prepared by the solid-state reaction method and investigated as a function of Pr concentration and sintering temperature. The excitation band ranging from 430 to 500 nm covers the emission wavelength of all commercial blue light-emitting di…
(La 2 O 3 ) 1‐ x (CeO 2 ) 2 x (ZrO 2 ) 2 mixed oxides (LCZ) where 0 ≤ x ≤ 1 were synthesised from commercial La 2 O 3 , CeO 2 and ZrO 2 powders and co‐melted in a 2‐kW solar furnace. These samples were re‐oxidised in air at temperatures that ranged from 900 K to 1100 K. The microstructures of the LC, LCZ and CZ oxides…
Rice straw is an abundantly available and potentially valuable biomass that is currently underexploited. In the present work, the reinforcing effects of nanoparticles (silica and clay) on the rice straw / polypropylene composites have been studied. In the sample preparation, four levels of loading (0–3 wt%) were used…
Understanding the mechanism of surface-enhanced Raman scattering (SERS) of molecules on semiconductor nanostructures is directly related to our capabilities of designing and optimizing new SERS-active substrates for broad applications in the field of molecular detection and characterization. Here, we present an explor…
The article reports the results of the studies on the effect of nano‐titanium dioxide (TiO 2 ) on the morphology, thermal, and mechanical properties of 1:1 starch/polyvinyl alcohol (PVA) composites. Degree of crystallinity of the starch/PVA blends increases with increase in the amount of nano‐TiO 2 as determined by di…
The ability to characterize individual electrospun fibers is essential in order to understand and control this complex process. In this paper, we demonstrate that confocal Raman microscopy is a powerful method to quantify molecular orientation and structure at the individual fiber level using poly(ethylene terephthala…
Using first-principles calculations, we investigate the electronic, structural, and vibrational properties of SrZrO${}_{3}$. We start from the high-symmetry cubic perovskite phase, for which the phonon dispersion curves are reported. We point out the coexistence of structural antiferrodistortive instabilities at the R…
Metal-catalyst-free chemical vapor deposition (CVD) of large area uniform nanocrystalline graphene on oxidized silicon substrates is demonstrated. The material grows slowly, allowing for thickness control down to monolayer graphene. The as-grown thin films are continuous with no observable pinholes, and are smooth and…
A matter of light: Selective control over the assembly of two distinct encapsulation complexes in solution is achieved by using light of two wavelengths and heat. Guest exchange can be triggered in a sequential or parallel fashion, depending on the wavelength applied, and three combinations of encapsulation complexes…
Based on first-principles calculations, the effects of the intrinsic defects and edge states on electronic structures and magnetic properties of AlN nanosheets (NSs) and nanoribbons (NRs) are investigated. In comparison to Al-defective AlN NS, N-defective systems can be easily achieved in experiments, and show a ferro…