Materials Literature
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Abstract Subwavelength gratings comprising a stack of two thin metallic wire gratings embedded in a dielectric exhibit distinctive color properties in transmittance. Its angle-dependent coloring can be easily noticed by human observers in ambient light. Moreover, it has pronounced polarizing properties in the visible…
The structure and resistive properties of buried ${\mathrm{SrVO}}_{3}$ layers between two insulating ${\mathrm{LaVO}}_{3}$ layers are investigated by varying the thickness of the ${\mathrm{SrVO}}_{3}$ layers between 3 and 35 monolayers. The thickest ${\mathrm{SrVO}}_{3}$ layer shows a bulklike metallic behavior, while…
Two diazaporphyrin (DAP)-porphyrin hetero dimers, in β-meso and β-β configurations, were prepared to study their photoinduced intramolecular electron transfer properties. The two meso nitrogen atoms in the porphyrin ring of DAP change its redox potential, making DAP more easily reduced, compared to its porphyrin count…
The electronic structure of CaO films of 10--60 monolayer thickness grown on Mo(001) has been investigated with synchrotron-mediated x-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM). Upon annealing or reducing the thickness of the film, a rigid shift of the CaO bands to lower energy is re…
Layered hydroxide zinc nitrate (LHZN; Zn5(NO3)2(OH)8·xH2O) films were fabricated on glass or plastic substrates by a chemical bath deposition method combined with a homogeneous precipitation in methanolic solutions. High- or low-temperature pyrolytic decomposition of the LHZN films having two-dimensional morphology wa…
An effective and facile route of solvent-transfer assisted photolithography (STAP) was explored to successfully fabricate uprightly standing high-density (HD) and high-aspect-ratio (HAR) micropillar arrays with excellent superhydrophobicity. The collapse problem that frequently occurs with the HAR micro or nano-struct…
Nanoscale spheres have led to a growing interest in their potential applications in a wide range of technological fields. Hollow nanospheres can be modelled as closed spherical shells in the analysis of their mechanical behaviour, the ratio of thickness to radius being used to ascertain the pertinence of considering o…
Self‐organized pattern formation is a phenomenon that can be used for nanoscale pattering of large surface areas in a cost‐effective manner. We exploit the phenomenon and fabricate sub‐micron polystyrene wrinkle structures and demonstrate that after being coated with silver, they can be used as surface‐enhanced Raman…
We report the synthesis of 11-mercaptoundecanoic acid (11-MUA) and 16-mercaptohexadecanoic acid (16-MHA) protected Au25 clusters with moderate yields (∼15%) using a NaBH4 purification strategy. UV-vis spectroscopy, transmission electron microscopy (TEM), and matrix-assisted laser desorption/ionization (MALDI) mass spe…
We report on the structural and colorimetric effects of interaction of aqueous ∼0.06-1% poly[9,9-bis(2-ethylhexyl)fluorene]-b-poly[3-(6-trimethylammoniumhexyl)thiophene] bromide (PF2/6-P3TMAHT) with double-stranded DNA to form PF2/6-P3TMAHT(DNA)x where x is the molar ratio of DNA base pairs to P3TMAHT repeat units; x…
In present study, the intense sensitized three photon near-infrared quantum cutting luminescence of Tm(3+) ion activator in Tm(3+)Bi(3+):YNbO(4) powder phosphor is reported. It is induced both by [{(1)G(4)→(3)H(4), (3)H(6)→(3)H(5)} or {(1)G(4)→(3)H(5), (3)H(6)→(3)H(4)}] and {(3)H(4)→(3)F(4), (3)H(6)→(3)F(4)} cross-ene…
$\mathrm{FeV}{\mathrm{O}}_{4}$ is a multiferroic that undergoes two antiferromagnetic transitions at ${T}_{\mathrm{N}1}\ensuremath{\sim}21\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ and ${T}_{\mathrm{N}2}\ensuremath{\sim}15\phantom{\rule{0.28em}{0ex}}\mathrm{K}$, with a small ferroelectric polarization developing at the 1…
Abstract A facile and general strategy was successfully developed for the surface modification of hydrophobic Fe 3 O 4 magnetic nanoparticles with various sizes (4–17 nm). The results show that the magnetic and hydrophobic properties are sensitive to the nanoparticle size. For example, the contact angle (CA) of the sam…
The effects of cell gap on the electro-optical properties of normal-mode polymer-stabilised cholesteric texture (PSCT) have been investigated. In this study, the size of the domain and electro-optical properties of PSCT are analysed as a function of the thickness of the cells. Increasing cell gap helps to improve the…
An electroplating method was used for the first time to synthesize 3D porous graphene oxide (PGO) architectures, exhibiting ultrahigh capacitance and energy density as electrodes of supercapacitors. Scanning electron microscopy illustrated the porous structures which promoted the stability and alleviated the stacking…
Unsteady bubble cloud cavitation phenomenon caused by negative pressure pulse has been treated numerically by applying a front tracking method. The behaviour of bubble cloud expanding and contracting is evaluated by tracking the motion of all bubble interfaces. Numerical investigation demonstrates that: (1) In the col…
The Cu thin film electrode grown on aluminum nitride ( AlN ) substrate is widely used in the thin film thermoelectric devices due to its high electrical conductivity. We have developed a new type of buffer layer by co-sputtering Ti and Cu forming Ti – Cu layer. The Ti – Cu layer was sputtered on the Ti buffered AlN su…
Antimonselite from the new occurrence, Pbram uranium-base metal ore district (Central Bohemia, Czech Republic), has been studied by means of electron microprobe and X-ray diffraction. Antimonselite crystals, reaching up to 1.5 mm across, were rarely found in the calcite gangue with uraninite in association with claust…
Collagen, the most abundant protein in mammals, is able to form fibrils, which have central role in tissue repair, fibrosis, and tumor invasion. As a component of skin, tendons, and cartilages, this protein contacts with any implanted materials. An inherent problem associated with implanted prostheses is their propens…
Mn - FeO x /carbon nanotubes (CNTs) catalysts were firstly prepared via simple incipient wetness method and used for low-temperature selective catalytic reduction (SCR) of NO with NH 3 . The structure and surface properties of the catalysts were characterized by N 2 sorption, X-ray diffraction (XRD), field emission sc…