Materials Literature
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The interactions between nanosized particles and living systems are commonly mediated by what adsorbs to the nanoparticle in the biological environment, its biomolecular corona, rather than the pristine surface. Here, we characterize the adhesion toward the cell membrane of nanoparticles of different material and size…
Application of virtual instruments to a process of measurements of geometrical characteristics of investigated objects is considered. Methods of construction of virtual instruments on a base of imitators and simulators are discussed. It is demonstrated, that a virtual scanning electron microscope (SEM) can be construc…
Using the usual mean-field theory approximation, the critical behaviour (i.e. the Curie temperature T c and the critical surface transverse field Ω sc ) in a multiple-surface-layer ferroelectric thin film is studied on the basis of the spin- transverse Ising model. The dependence of the Curie temperature T c on the su…
ZrO 2 impurity phase was examined by means of X-ray diffraction and scanning electron microscopy in reactive-sintered ZrB 2 –SiC–ZrC composites hot-pressed at 1600°C and 1800°C. An analytical electron microscopy study further revealed solid-solution of both Zr and O in the β-SiC phase: Zr:Si ratios were measured to be…
We have constructed an ellipsometer capable of rapid polarization measurements based on two photoelastic modulators. It is capable of simultaneously measuring all elements of the Stokes vector on a 10-ms time scale, allowing for a complete polarization analysis including any depolarization that may occur at rough and…
Measurements of the nonlinear conductivity in NbSe${}_{3}$ when the high-$T$ and the low-$T$ charge-density waves (CDWs) are simultaneously sliding have been performed. It is shown that the threshold electric field ${E}_{t1}$ for depinning the high-$T$ CDW increases 4--5 times at the temperature at which the low-$T$ C…
We report experiments on simple shear of a monolayer of bidisperse and polydisperse bubbles in a Couette device. The bubbles segregate according to their sizes, with larger ones in the middle of the gap and smaller ones closer to the walls, when the shear rate and the bubble size ratio are each above a threshold. The…
Abstract Liquid ammonia was used to treat films of nanofibrillated cellulose (NFC), trimethylammonium‐modified NFC (TMA‐NFC), and their composites with vermiculite. Crystal structure, mechanical properties, water vapor permeation and water vapor adsorption of the resulting materials were investigated. Upon treatment,…
We studied the photoluminescence spectra of silicon and phosphorus co-implanted silica thin films on (100) silicon substrates as a function of isothermal annealing time. The rapid phase segregation, formation, and growth dynamics of intrinsic silicon nanocrystals are observed, in the first 600 s of rapid thermal proce…
Superconducting FeSe 0.5 Te 0.5 thin films are deposited on amorphous substrates, i.e., glass substrates by a pulsed laser deposition (PLD) technique. Microstructural characterizations show that the films are highly textured along (00 l ) with good crystallinity. The superconducting critical transition temperature ( T…
Abstract A differential scanning calorimetry (DSC) and small‐angle X‐ray scattering (SAXS) study of miscibility in blends of the semicrystalline polyester poly(3‐hydroxybutyrate) (PHB) and amorphous monomer epoxy DGEBA (diglycidyl ether of bisphenol A) was performed. Evidence of the miscibility of PHB/DGEBA in the mol…
The purpose of this study is to solve the problem of low achievement in fabricating sandwich surface-enhanced Raman scattering (SERS) substrates. We demonstrated a highly efficient sandwich structure by the oriented assembly of metal nanoparticles (NPs) on a periodic hexagonal array of metal nanoprisms with 1,4-benzen…
We develop a device model for p-i-n tunneling transit-time diodes based on single- and multiple graphene layer structures operating at the reverse bias voltages. The model of the graphene tunneling transit-time diode (GTUNNETT) accounts for the features of the interband tunneling generation of electrons and holes and…
Vertically oriented and robust polyelectrolyte nanotube arrays with high density, large area and high uniformity were successfully grown on substrates by a ZnO nanowire array-templated layer-by-layer (LbL) self-assembly approach for the first time, and were further used to deliver charged drugs, showing that they not…
4-(2-Perfluorohexyl)-ethoxy-4′-cyanobiphenyl (F6H2OCB) and 4-(2-perfluorooctyl)-ethoxy-4′-cyanobiphenyl (F8H2OCB) were synthesised by Mitsunobu reaction. Liquid crystalline state of F6H2OCB and F8H2OCB was studied by differential scanning calorimetry (DSC) and microscopic observation. Broken fan-shaped texture, which…
In this paper, we report a study of the effect of excess iron on structural, microstructural, electric and dielectric properties of the nanostructured Ni–Zn ferrites Ni 1− x Zn x Fe 2+ z O 4− δ of different compositions with x = 0, 0.3, 0.5, 0.7, 1 and z = 0, 0.1. The structural and microstructural properties are esti…
Random poly(ethylene-co-1,4-cyclohexylenedimethylene terephthalate) and poly(ethylene-co-1,4-cyclohexylenedimethylene terephthalate)/organoclay nanocomposites were synthesized via in situ polymerization of terephthalic acid, ethylene glycol, 1,4-cyclohexane dimethanol, and aminosilane-modified Cloisite30B. An amorphou…
In this study, we investigated the unpaired electrons and singly occupied molecular orbitals (SOMO) of positively charged Au(25) molecular clusters using solid-state electron paramagnetic resonance (EPR). The EPR powder spectra of the positively charged (Au(25) (+)) and neutral (Au(25) (0)) species of Au(25) are discu…
The electronic structure of individual carbon nanotubes (CNTs) with different diameters has been investigated by scanning transmission X-ray microscopy (STXM). Various factors that may alter the STXM spectral features in CNT bundles have been discussed. Tube diameter has been found to be proportional to the spectral i…
Theoretically, when a one-dimensional (1D) ballistic thermal conductor is mechanically bent beyond its elastic limit, nonlinear structural buckling will develop and reduce the transmission of phonons. However, because of limited mechanical strengths and short phonon mean free paths of most materials, no experimental w…