Materials Literature
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The morphology, chemical composition, and optical properties of long monoaxonic spicules were studied in several species of marine deep-sea hexactinellid sponges of different orders and families: Asconema setubalense (Hexasterophora, Lyssacinosida) and Monorhaphis chuni Schulze (Monorhaphiidae). Their macrostructural…
The electrochemical oxidation of 2-aminobenzothiazole, 2-ABT, on Pt-electrode has been investigated using CV in HCl solutions under nitrogen atmosphere at different temperatures, different monomer concentrations and different Na 2 SO 4 concentrations. The experimentally obtained kinetic equation was R P,E = k E [monom…
The phase diagram of the penetrable square-well fluid is investigated through Monte Carlo simulations of various nature. This model was proposed as the simplest possibility of combining bounded repulsions at short scale and short-range attractions. We prove that the model is thermodynamically stable for sufficiently l…
We report a one-step process for decorating poly(trimethylene terephthalate) (PTT) nanofibers with CdSe/ZnS core/shell quantum dots (QDs). Using the QD-decorated PTT nanofibers with diameters of 400-800 nm as active subwavelength waveguides, their high photostability for 630 nm red light and low absorption coefficient…
通过合成一种含有二硫代羧基,羧基和镧离子的新型稀土促进剂谷氨酸二硫代氨基甲酸镧(简称La-GDTC),并利用平衡溶胀法研究了La-GDTC对丁苯橡胶(SBR)/SiO2复合材料界面作用的影响.交联密度测试表明,SiO2的加入能够有效提高SBR/La-GDTC/SiO2复合材料的交联密度;而SBR/La-GDTC/SiO2复合材料的溶胀Gibbs自由能G下降,熵减S上升,表明了复合材料的硫化网络非均匀性提高,SiO2的界面化学环境发生改变;Kraus曲线得到的聚合物-填料相互作用参数证实了La-GDTC能够提高SBR与SiO2的界面黏结.应力-应变曲线表明La-GDTC对SBR/SiO2复合材料的增强作用明显优于二乙基二硫代氨基甲酸…
Abstract Surface modification of PMMA (polymethylmethacrylate) was carried out by irradiation with low‐energy ions and/or electrons, which is expected to improve the surface hardness by introduction of a thin modified layer. The surface hardness was measured by the nanoindentation test. To clarify the structure and th…
We report a novel method to fabricate ordered arrays of gold-polymer composite nanorods with the orientation in the vertical direction using block copolymer (BCP) film. The salt precursor is selectively infiltrated within vertically aligned cylindrical domains of the BCP film by immersing the template in a simple aque…
A Nd-doped BiFeO(3) thin film deposited on MgO substrate was studied by synchrotron diffraction. The ferroelectric nature of the film is proven by in-plane remanent polarization measurement. The highest possible symmetry of the film is determined to be orthorhombic, within the Fm2m space group. Such a structure is rot…
The present work determined the phase relations in the Si–C–N–O–R systems, involving SiC–Si 3 N 4 –R 2 O 3 , Si 3 N 4 –SiO 2 –R 2 O 3 , and SiC–Si 3 N 4 –SiO 2 –R 2 O 3 (R = La,Gd,Y) systems by XRD phase analyses of the solid‐state reacted samples from powder mixtures of SiC , Si 3 N 4 , and R 2 O 3 . Subsolidus phase…
We evaluated the optical properties required for the design of a solar-pumped laser for Nd3+-doped ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) glass. The quantum efficiency (QE) of near-infrared emission from the 4 F3/2 state of Nd3+ using sunlight as an excitation source was 70%. The product of the stimulated emission cross sect…
Based on the nonequilibrium Green's function method within the tight-binding approximation scheme, through a scanning tunneling microscopy (STM) model, we study the low-energy electronic states and transport properties of carbon chains in armchair-edged graphene nanoribbons (AGNRs). We show that semiconducting AGNRs p…
We have investigated the photochemical grafting of organic alkenes to atomically flat ZnO(10 ̅10) single crystals and ZnO nanorods as a way to produce functional molecule-semiconductor interfaces. Atomic force microscopy shows that photochemical grafting produces highly conformal, smooth molecular layers with no detec…
New synthetic pathways for novel C(3)-symmetric molecules featured with a thiophene-fused six-five-five carbon-bridged coplanar core structure have been established. The incorporation of thiophene as the constituent of a C(3)-symmetric core provides effective modulation of the physical properties and imparts extra fle…
During the study of time-dependent dielectric breakdown (TDDB) of back-end-of-line low-kdielectrics, accurate statistical and area-scaling models are important for the final reliability lifetime projection. The extrapolated product lifetime from high percentiles to low percentiles has strong dependence on the choice o…
Surface states play essential roles in condensed matter physics, e.g., as model two-dimensional (2D) electron gases and as the basis for topological insulators. Here, we demonstrate quantum interference in the optical excitation of 2D surface states using the model system of C(60)/Au(111). These surface states are tra…
Understanding the physical properties of magnetic nanowires (NWs) is of crucial importance due to their potential technological applications. In this paper we report a detailed study on the temperature dependence of the magnetic [$M(T)$] and magnetotransport [$\text{MR}(T)$] properties of Ni and NiFe NWs grown on anod…
The ability to tune the quasi-phase-matching (QPM) frequency is a highly desirable though lacking feature of many nonlinear devices. To this end, we consider QPM in a special class of active nonlinear metamaterials (MMs), whose properties can be controlled postfabrication. By application of a tunable, periodic perturb…
Abstract Cellular materials have become increasingly interesting for applications in combustion environments. Improvements like high power efficiency and low emissions are the main targets of technological development in combustion processes. However, despite scientific and technical success in developing new or impro…
A simple and controllable one-step method to fabricate superhydrophobic surfaces on poly(tetrafluoroethylene) (PTFE) films is developed on the base of electron irradiation. When the thickness of PTFE films is higher than the penetration depth of electron beams, electrical charging occurs at the surface of the films be…
The electron transport behavior in chemically reduced graphene oxide (rGO) sheets with different thicknesses of 2, 3, and 5 nm was investigated. The four-probe method for the sheet resistance (R(S)) measurement on the intensively reduced graphene oxide samples indicates an Arrhenius characteristic of the electron tran…