Materials Literature
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n -ZnO thin films were deposited electrochemically onto the p-GaN/Al2O3 substrate in order to form hetero p-n junction. X-ray diffraction measurement has been showed clearly (0002) c-axis orientation of grown ZnO thin film. Absorption measurements were carried out before and after growth process indicating both sharp…
Abstract La 2− x Bi x Mo 2 O y ( x = 0, 0.02, 0.03, 0.04, 0.05, 0.06, 0.08, 0.1, 0.16, 0.24, 0.3) ceramic samples have been characterized by X‐ray diffraction, differential scanning calorimetry (DSC) and conductivity measurements in order to assess the dynamics of the transitions between the low‐temperature ( α ), hig…
Abstract The paper provides the properties of single crystalline 4H‐SiC under helium implantation at temperatures of implantation up to 750 °C and fluences in the range 5 × 10 15 –1 × 10 17 cm −2 . The microstructure evolution was studied by transmission electron microscopy cross‐section and X‐ray diffraction experime…
${\text{BiFe}}_{0.7}{\text{Mn}}_{0.3}{\text{O}}_{3+\ensuremath{\delta}}$ with space group $R3c$ is reported to go through two phase transformations, first to the orthorhombic paraelectric phase $(Pbnm)$ and finally to cubic perovskite structure with space group $Pm\overline{3}m$. A discontinuity in volume and enthalpy…
This work reports experimental evidence for a redshift in the main peak in the valence electron energy loss spectrum of nanoporous MgO. An interpretation is given based on effective-medium response theory. We find that the main peak energy depends on the density of nanopores within the illuminated area. As a result, b…
We study the influence of mutual interaction on the conformation of flexible poly(propyleneamine) dendrimers of fourth generation in concentrated solution. Mixtures of dendrimers with protonated and deuterated end groups are investigated by small-angle neutron scattering up to volume fractions of 0.23. This value is i…
A detailed single-crystal X-ray study of conformationally flexible sulfonimide-based dendritic molecules with systematically varied molecular architectures was undertaken. Thirteen crystal structures reported in this work include 9 structures of the second-generation dendritic sulfonimides decorated with different ary…
Probing with a tip of scanning tunneling microscopy (STM) of metallic single-walled carbon nanotubes (SWCNT) was found to induce defects in the tubes. The primary defect formation by probing was enhanced with a rate proportional to tunnel-injected electron current above a sample-bias threshold of around +4 V. Scanning…
Abstract Holographic and direct‐written structures are fabricated in tin‐doped silicophosphite thin plates containing rhodamine 6G dye by a photothermal process based on the principle of glass softening/frozen‐in behavior. To be highly processable by photothermal treatment and stable at room temperature after processi…
In this letter we introduce the concept of optical security marks based on photonic metamaterials. We propose that a metamaterial with strong negative magnetic activity in the visible wavelength regime can be used to create a security mark that can be incorporated in any object to ensure its authenticity. The sophisti…
We apply density functional theory concept to investigate mechanical properties of the diamondlike compound BC5. The cell volume and the bulk modulus are in very good agreement with the experiment, confirming the claimed crystal structure of BC5. The cleavage properties revealed a very strong cohesion between B–C bond…
In this work, a novel processing route to fabricate alumina surfaces that feature remarkable antibacterial and abrasion-resistant properties is reported. By combining micropatterning with antibacterial enzymes and alumina nanoparticles, we fabricated surfaces that present a feasible and highly interesting alternative…
Epitaxial, c-axis oriented BaTiO3 thin films were deposited using pulsed laser ablation on flexible, polycrystalline Ni alloy tape with biaxially textured oxide buffer multilayers. The high quality of epitaxial BaTiO3 thin films with P4mm group symmetry was confirmed by x-ray diffraction. The microscopic ferroelectric…
Abstract A semiconductor/metal hybrid system with silicon as base material and embedded metal nanostructures is fabricated in two steps by anodizing the silicon substrate in an aqueous hydrofluoric acid solution and a subsequent electrodeposition process. The achieved self‐assembled nanoscopic hybrid system consists o…
Abstract Dislocations in large hen egg‐white lysozyme (HEWL) crystals with tetragonal and orthorhombic forms were investigated by means of synchrotron monochromatic‐beam X‐ray topography. For the tetragonal form, not only screw dislocations but also edge ones are found to be included in predominant ones parallel to 〈1…
Resistance noise spectroscopy is applied to bulk single crystals of the quasi-two-dimensional organic conductor $\ensuremath{\kappa}\text{\ensuremath{-}}{(\text{BEDT-TTF})}_{2}\text{Cu}[\text{N}{(\text{CN})}_{2}]\text{Cl}$ both under moderate-pressure and at ambient-pressure conditions. When pressurized, the system ca…
Nanocrystalline silicon microwires are self-heated through single, large amplitude, and microsecond voltage pulses. Scanning electron micrographs show very smooth wire surfaces after the voltage pulse compared to as-fabricated nanocrystalline texture. Voltage-pulse induced self-heating leads to significant conductance…
Through density functional theory calculations, we demonstrate that enhancement of optical absorption and optimization of the fundamental band gap for Cu delafossites can be achieved through alloying group IIIA and IIIB delafossites. These alloys significantly improved the flexibility in designing delafossite-based ph…
The match between the calculated TD-DFT electronic circular dichroism spectrum of the M,M configuration of the lemniscular [36]octaphyrin 1 and the previously reported measured spectrum suggests that the assignment of the latter to the P,P enantiomer requires inverting to M,M. The unusually large magnitude of the calc…
We report experimental results on tuning ultraviolet (UV) emissions of colloidal ZnO quantum dots (QDs) with uniform size in poly(methyl methacrylate) (PMMA) through controlling their dispersion. Instead of using organic ligands, exfoliated nanoplatelets were utilized as an inorganic dispersant to achieve controlled a…