Materials Literature
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We present the results of an extensive molecular dynamics study of self-interstitial atom (SIA) clusters containing up to 37 defects over a wide range of temperatures in iron. A long simulation time and high statistics of defect jumps allowed a detailed treatment of the data to be performed. Diffusion exhibits a chang…
We elucidate, from thermodynamic arguments, the governing factors of receptor-mediated endocytosis of nanoparticles (NPs). We show that the endocytic energetics specifies a minimal particle size and a minimal ligand density below which endocytosis is not possible. Due to the entropic penalty involved in ligand-recepto…
Abstract A 3D spongy collagen cryogel was prepared using DAS as the cross‐linker. FTIR and CD studies demonstrate that crosslinking is achieved through the reaction of the DAS aldehyde groups with the free amino groups in collagen without affecting the triple helix of collagen. SEM demonstrates that the cryogel has a…
Abstract This work presents a new technique named Raman strain rosette for the micro‐strain measurement of both Raman active and Raman inactive materials. The technique is based on the theoretical model of the carbon nanotube (CNT) strain sensor that applies the resonance and polarization Raman properties of CNTs and…
Ba and Mn doped BiFeO3 prepared through the pyrolysis of xerogel precursors are characterized by powder x-ray diffraction, high resolution transmission electron microscopy, superconducting quantum interference device magnetometry, and polarization measurements. Structural studies by x-ray diffraction and transmission…
We propose colloidal CdSe/CdS dots in rods as nonclassical sources for quantum information technology. Such nanoemitters show specific properties such as strongly polarized emission of on-demand single photons at room temperature, dipolelike behavior and mono-exponential recombination rates, making us envision their s…
Nonstoichiometric tungsten bronze-structured ferroelectric SrxBa1−xNb2O6−δ (SBN) single crystals were found to be a promising n-type thermoelectric oxide. Thermopower anomalies were observed at the phase transition temperatures, depending on the degree of reduction as well as crystal anisotropy. Above 500 K, heavily r…
High 'n low: The novel {[Fe(tmphen)2]3[Os(CN)6]2} complex (see structure) is the first example of a cluster in which a high-spin FeIII ion is in a coordination environment of four imine nitrogen atoms and two N-coordinated cyanides. Magnetic studies reveal an unprecedented type of reversible charge transfer induced sp…
Surface of detonation nanodiamonds was functionalized for the covalent attachment of immunoglobulin, and simultaneously bovine serum albumin and Rabbit Anti-Mouse Antibody. The nanodiamond-IgG(I125) and RAM-nanodiamond-BSA(I125) complexes are stable in blood serum and the immobilized proteins retain their biological a…
Abstract Raman studies of nanocomposite SiCN thin film by sputtering showed that with increase of substrate temperature from room temperature to 500 °C, a transition from mostly sp 2 graphitic phase to sp 3 carbon took place, which was observed from the variation of I D / I G ratio and the peak shifts. This process re…
We show that ac magnetoresistance at room temperature in La0.7Sr0.3MnO3 is extremely high (≈−47% in μ0H=100 mT, f=3–5 MHz), and magnetic field dependence of reactance exhibits a double peak behavior. However, magnitudes of the ac magnetoresistance and magnetoreactance for a fixed length of the sample (li) decrease wit…
The implantation and growth of metal nanoparticles on graphene nanosheets (GNS) leads directly to severe damage to the regular structure of the graphene sheets, which disrupts the extended pi conjugation, resulting in an impaired device performance. In this paper, we describe a facile approach for achieving the lossle…
Selection of an appropriate corrosion inhibitor, inhibitor combination or package is an exceptionally cost effective and materials saving measure in various industries. Current trends and novel approaches in corrosion inhibitors are reviewed here. Recent developments in the inhibition technology are discussed in accor…
Numerous measurements showed that the crack tip opening angle (CTOA) is nearly constant upon stable ductile fracture in Al alloys which widely used in modern transportation industry. The atomic structure of the very tip of a crack front has remained unknown, however. We have carried out a first-principles density func…
Metallic nanoparticles embedded in dielectrics permit enhanced capture of light at specific wavelengths through excitation of plasmons, i.e. the quanta of coherent and collective oscillations of large concentrations of nearly free electrons. In order to maximize the potential of such enhanced absorption in useful task…
The properties of materials near structural phase transitions are often successfully described in the framework of Landau theory. While the focus is usually on phase transitions, which are induced by temperature changes approaching a critical temperature T-c, here we will discuss structural phase transformations drive…
With soft micro- and nanopatterned materials becoming increasingly useful for various, optical, mechanical, electronic, microfluidic, and optofluidic devices, the extension of this paradigm to a pure protein-based material substrate provides entirely new options for such devices. Silk fibroin combines the properties o…
The effect of a N2 impurity on the radial thermal expansion coefficient (ar) of single-walled carbon nanotube bundles has been investigated in the temperature interval 2.2 - 43 K by the dilatometric method. Saturation of nanotube bundles with N2 caused a sharp increase in the positive magnitudes of ar in the whole ran…
Cocaine cracked: The gel–sol transition of an enzyme-caged hydrogel has been efficiently controlled by target binding events, which trigger release of the enzyme to take part in its catalytic role for signal amplification (see picture). As low as 20 ng of cocaine can be visually detected within 10 min without any aid…
Large-sized chemical vapor deposited graphene films configured as solution-gated transistors can label-freely and electrically detect DNA hybridization with single-base specificity. The gate voltage which gives the minimum device conductance (Vg,min) is sensitive to the charge transfer between DNA molecules and graphe…