Materials Literature
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INTRODUCTION: There is broad interest in a targeted strategy that delivers a concentrated therapeutic payload to tumor cells, because of the significant potential for improvements in therapeutic outcomes and reduction of side effects if therapeutics can be delivered only to diseased tissue. AREAS COVERED: This review…
A Comment on the Letter by Péter Ágoston et al. [Phys. Rev. Lett. 103, 245501 (2009)]. The authors of the Letter offer a Reply.Received 18 February 2010DOI:https://doi.org/10.1103/PhysRevLett.106.069601© 2011 American Physical Society
PURPOSE: The binding of nanoparticles to in vivo targets impacts their use for medical imaging, therapy, and the study of diseases and disease biomarkers. Though an array of techniques can detect binding in vitro, the search for a robust in vivo method continues. The spectral response of magnetic nanoparticles can be…
The interplay of physical and chemical processes in the heterogeneous catalytic synthesis of methanol on the ZnO(0001) surface with oxygen vacancies is expected to give rise to a complex free energy landscape. A manifold of intermediate species and reaction pathways has been proposed over the years for the reduction o…
We have studied the electronic and optical properties of twisted bilayer graphene using the first-principles$\mathit{GW}$--Bethe-Salpeter equation approach. The optical absorption spectrum of twisted-bilayer graphene is analogous to that of graphene, which is attributed to the characteristic dispersion of Dirac fermio…
We reveal a rich variety of electronic and magnetic properties of H-terminated BC 2 N nanoribbons (BC 2 NNRs) by using extensive first-principles calculations. Zigzag edged BC 2 NNRs ( z -BC 2 NNRs) can be semiconducting or metallic depending on the alignment of edge atoms. In particular, magnetic and even half-metall…
The orbital ordering and spin state in the room-temperature ferromagnet Sr 3 YCo 4 O 10.5 were investigated by a resonant X-ray scattering technique. A resonating signal with a σ→π' scattering component was observed at ( h 00), where h =2 n +1 ( n : integer), near the 1 s → e g transition energy of Co. This provides d…
Abstract Hyperbranched alkyd resins (HBRA) were synthesized by modification of hydroxylated hyperbranched polyester (HBP1‐4) with tall oil fatty acids (TOFA). The core is a hydroxylated hyperbranched polyester of fourth generation with OH groups in the periphery (18), which is endcapped with tall oil fatty acids. The…
We prepared polycrystalline SmFeAsO 1 − x F x (Sm1111) bulk samples by sintering and hot isostatic pressing (HIP) in order to study the effects of phase purity and relative density on the intergranular current density. Sintered and HIP processed Sm1111 samples are denser with fewer impurity phases, such as SmOF and th…
We present a new route to stable magnetic-plasmonic nanocomposite materials with exceptional control over composite size and very high monodispersity. The method involves the assembly of magnetic iron oxide nanoparticles, of any size in the superparamagnetic size range, whose steric repulsion is gradually reduced by c…
The optical band gap, refractive index and oscillator parameters of amorphous semiconductor Se70S30− x Sb x thin films with x = 0, 18, 12 and 30 at. % deposited by electron-beam evaporation were investigated by optical spectrophotometry. The energy gap decreases from 2.25 to 1.08 eV with increasing Sb content introduc…
In this paper, remote excitation of surface-enhanced Raman scattering (SERS) based on propagating surface plasmon polariton (SPP) on single well-defined crystal Au nanowire with quasi-spherical termini has been reported. Considering the terminal shape dependence of propagating SPP on nanowires, we first study the rela…
Oscillating structural forces arise when nanoscale colloids are confined at high concentration between two approaching surfaces. As layers of colloid are squeezed out, changes in osmotic pressure cause alternating regions of repulsion and attraction. Here, we provide direct measurements of such oscillatory structural…
UNLABELLED: We aimed at evaluating the toxicity effects of low (subtoxic) concentrations of silver nanoparticles nanoparticles (AgNP, 5-10 nm) in human hepatoblastoma (HepG2) cell line after and during a period of about one month. METHODS: XTT and MTT assays were used to draw a dose-response curve; IC50 (half maximal…
Combining nonequilibrium Green function's approach with density functional theory, effects of the applied mechanical loads on polarization, electrostatic potential, and tunneling conductance of a ferroelectric tunneling junction (FTJ) have been investigated. Using the first principle calculations, we show that compres…
Acetyl-coenzyme A synthetase (Acs) activates acetate into acetyl-coenzyme A (Ac-CoA) in most cells. In Salmonella enterica, acs expression and Acs activity are controlled. It is unclear why the sirtuin-dependent protein acylation/deacylation system (SDPADS) controls the activity of Acs. Here we show that, during growt…
In this paper, a positive effect of rapid thermal annealing (RTA) technique has been researched and compared with conventional furnace annealing for Si nanocrystalline in silicon carbide (SiC) matrix system. Amorphous Si-rich SiC layer has been deposited by co-sputtering in different Si concentrations (50 to approxima…
<italic>Interfacial Science</italic> starts off by introducing the topic. It moves on to consider capillarity and the mechanics of surfaces, the absorption and the thermodynamics of surfaces, and the gas-liquid interface in terms of absorption, films and foams, and aerosols. It then looks at insoluble monolayers and L…
The structural properties of vapor-deposited organic glasses have been shown to depend significantly upon the temperature of the substrate during the deposition. In order to systematically study this effect, a stage was designed to maintain a linear temperature gradient of 80 K across a substrate during vapor depositi…
We report a novel photofunctional magnetic nanoparticle that is strategically designed and prepared by simple modification process. Photofunctionality is provided by the photosensitizer (PS) of [5,15-bis(phenyl)-10,20-bis(4-methoxycarbonylphenyl)porphyrin]platinum that generates singlet oxygen in high quantum yield. T…