Materials Literature
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Porous silicon micro-particles (micro-pSi) with size in the range of 1–10 μm are obtained by etching of silicon wafers followed by sonication. The derivatization of the micro-pSi surface by wet chemistry (silylation and coupling with a diamine) yields an interface, which exposes negative (carboxylic) or positive (amin…
Thermoresponsive materials with a lower critical solution temperature (LCST) are receiving growing attention, of which examples of non-polymeric small molecules are limited. Monodisperse oligoethylene glycol amphiphiles that contain aromatic units with a LCST in water have been developed and applied to peptide extract…
We develop a theory for optical Faraday rotation noise in two-dimensional Dirac materials. In contrast to spin noise in conventional semiconductors, we find that the Faraday rotation fluctuations are influenced not only by spins but also the valley degrees of freedom attributed to intervalley scattering processes. We…
In this study, polyhydroxybutyrate (PHB) coated magnetic nanoparticles were prepared which are targetable to tumor cells in the presence of a magnetic field. The structural properties, functional groups, size distribution, and magnetic properties of the synthesized PHB coated magnetic nanoparticles were characterized…
Freezing and thawing of water in saturated concrete induces stresses, cracks, spalling, and eventually allows chlorides, sulphates and other ions to penetrate through the porous space of concrete causing the corrosion and ultimately structural failure. These detrimental factors are limited if concrete has the ability…
Gold nanoparticles (NGs) were modified by the aptamer (ssDNA) to prepare a NGssDNA probe for As3+. In pH 8.0 HEPES buffer solution containing 50 mmol L−1 NaCl, rhodamine 6G (Rh6G) molecules adsorbed on the NGssDNA sol substrate exhibited a strong surface-enhanced Raman scattering peak (SERS) at 1358 cm−1. Upon additio…
ABSTRACT Poly( l ‐lactide) (PLLA) nanofibers were prepared by melt extrusion of immiscible blends of PLLA/low density polyethylene (LDPE) and subsequent removal of the LDPE matrix from the blend fibers. The effect of blends composition and draw ratio on the phase structure of the blend fibers, crystallization, mechani…
Current-voltage (I–V) characteristics of the graphene field effect transistors (GFETs) are measured by the dc, fast I–V (FIV), and pulsed I–V (PIV) methods and analyzed. The hysteresis and conductance in the dc measurement are affected by the sweeping bias range and direction. The I–V curves measured by the FIV method…
The possibility of SbSI doping by bismuth, yttrium, lanthanum, neodymium and samarium cations during the synthesis in aqueous solution has been studied. The variation of SbSI unit cell volume in the case of bismuth and neodymium doping is proved by XRD analysis. The textures of bismuth doped material were grown by the…
Levanyuk-Sannikov model is used to describe the ferroelectric-paraelectric transition in bulk and confined sodium nitrite (NaNO2). It is found on the basis of this model that the phase transition of NaNO2 for the bulk material is weakly first order whereas for the confined material it is a second order transition. Cal…
Contaminants in water streams, in the form of oily/organic phases or nanoparticles, affect a large variety of activities, from laboratory practice up to environmental systems. To date, a large number of materials for the absorption and retention of these pollutants have been developed. Such materials, however, rarely…
Maghemite (γ‐Fe 2 O 3 )‐poly(methyl methacrylate) (PMMA) nanocomposites were prepared by grafting 3‐(trimethoxy‐silyl) propyl methacrylate on the surface of maghemite nanoparticles, this process being followed by methyl methacrylate radical polymerization. Three different hybrids with 0.1, 0.5, and 2.5 wt% of maghemit…
AIM: Oral and intramuscular sustained-release antiretroviral solid drug nanoparticles (SDNs) are in development but there is limited understanding of whether nanoparticles or dissolved drug predominate systemically. MATERIALS & METHODS: A flow cytometric method was developed to analyze SDNs in biological fluids such a…
Single crystals of LaMn0.5Co0.5O3 belonging to the ferromagnetic-insulator and distorted perovskite class were grown using a four-mirror optical float zone furnace. The as-grown crystal crystallizes into an orthorhombic Pbnm structure. The spatially resolved 2D Raman scan reveals a strain-induced distribution of trans…
Cholesteryl group-modified tilapia gelatins (Chol-T-Gltns) with various Chol contents from 3 to 69 mol % per amino group of Gltn were prepared for the assembly of liposomes and cells. Liposomes were physically crosslinked by anchoring Chol groups of Chol-T-Gltns into lipid membranes. The resulting liposome gels were e…
Polystyrene spheres are used to template TiO2 with a single layer of 300 nm wells which are infilled with PbS quantum dots to form a heterojunction solar cell. The porous well device has an efficiency of 5.7% while the simple planar junction is limited to 3.2%. Using a combination of optical absorption and photocurren…
In the present work, ZnO nanoparticles (ZNP) and ZNP in combination with nanoclays are reported as reinforcing agents for the preparation of ‘Green’ nanocomposites based on glutaraldehyde (GA) crosslinked starch/jute fabric. A solution-induced intercalation method has been used for the successful fabrication of the na…
Electrical treeing is an electrical aging phenomenon that severely threatens the operation safety of power equipment, in which polymer is used as primary insulation material. A type of low-density polyethylene-montmorillonite (LDPE/MMT) nanocomposite was prepared using melt method to study the impact of MMT nanopartic…
High purity Ti3SiC2 samples were prepared by infiltration sintering method. The tribological behaviours of high pure bulk Ti3SiC2 dry sliding against a GCr15 bearing steel disc were experimentally investigated on a pin on disc type tester under different sliding speeds from 5 to 50 m s−1, different electric currents f…
The results of previous work (Baldwin et al 2013 J. Nucl. Mater. 438 S967–70 and Baldwin et al 2014 Nucl. Fusion 54 073005 ) are extended to explore the influence of layer thickness on the thermal D 2 release from co-deposited Be–(0.05)D layers produced at ∼323 K. Bake desorption of layers of thickness 0.2–0.7 µ m are…