Materials Literature
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When two metallic surfaces supporting plasmonic excitation are brought into close proximity of each other, a nanogap (of width on the subwavelength scale) will form, which boosts greatly the local optical field. Based on this idea, we fabricated two types of three-dimensional plasmonic substrates with such nanogaps, t…
In this communication, we develop a simple pathway to prepare SERS-active substrates with Au nanoparticles (NPs) by an electrochemical strategy of deposition-dissolution cycles (DDCs). The prepared SERS-active substrates demonstrate large Raman scattering enhancement for Rhodamine 6G (R6G) with a detection limit of 2…
Biogenic 3-D SiO2 micro-assemblies (diatom microshells) of low specific surface area (SSA, <2 m2g−1) have been transformed into 3-D replicas of high SSA C (>1300 m2g−1) and Pt-loaded C (>600 m2g−1) by a shape-preserving serial reaction process. Such high SSA micro-assemblies may be generated in a wide variety of selec…
Nitridation behaviors of silicon powder doped with various rare-earth oxides were studied in order to assess the nitridation enhancing effect of the rare-earth oxides on the formation of reaction bonded silicon nitride. Thermo-gravimetric analysis revealed that the addition of CeO2 and Eu2O3 to Si powder reduced the t…
In this paper, a simple strategy was developed to fabricate a novel kind of uniform, biocompatible and PEGylated multifunctional hybrid micelles with multiple magnetite nanocrystal loaded cores and dye-doped silica cross-linked shells based on the self-assembly between poly(ε-caprolactone)-b-poly(acrylic acid) copolym…
Kerosene has been used as a precursor for the production of carbon nanomaterial without a catalyst precursor. Nanomaterials formed in the process have been analysed by Raman, Scanning electron microscope (SEM), x‐Ray diffraction (XRD) and by Energy dispersive spectroscopy (EDS). Carbon nanomaterial produced show the m…
We report a facile grafting-from strategy towards the synthesis of inorganic–organic composites of semiconductor nanocrystals and wide-bandgap polymers. Amino-functional fluorenes have been used as co-ligands for CdSe nanocrystals, thus enabling us to design their surface directly during the synthesis. Highly monodisp…
The effect of Zn substitution on the structure and magnetic properties of τ-MnAl has been investigated sys-tematically. It is found that Zn substitution can stabilize the structure of τ-phase and thus a significant amount of τ-phase can be produced. Zn increases the coercivity and saturation magnetization of the τ-MnA…
Pyrene excimer fluorescence is efficiently regulated through formation of π-stacked aggregates between dialkynylpyrene (Y) and perylenediimide (E) residues located in the stem region of a molecular beacon (MB). The building blocks form organized, multichromophoric complexes in the native form. Hybridization to the tar…
A systematic study of the reduction behavior of various types of uniform Cu2O nanocrystals reveals that the surface blocking effect exerted by the capping ligand on the reduction behavior of the Cu2O nanocrystals depends not only on the type of capping ligand but also on the reactant and that coupling between adjacent…
Nanoparticles of Gd2O3:Eu3+ ∼20 nm in diameter were synthesized at ∼180 °C using a facile high boiling-point alcohol (polyol) method. The Gd2O3 nanoparticles, doped with 5 mol% Eu, were crystalline cubic phase and exhibited intense 5D0–7F2 photoluminescence (PL) from Eu3+ after calcination at 600 °C for 2 h in air. Ph…
The graphite oxide was prepared by oxidizing purified natural flake graphite via modified Hummers method. The graphene oxide was prepared by graphite oxide exfoliating in distilled water with ultrasonic waves. The XRD results showed the interlayer space of the graphite increased obviously after being oxidized. Graphen…
In this work, the temperature-dependent swelling and shrinking behavior of poly(N-isopropyl acrylamide) has been exploited for in situ formation of silver nanoparticles within the hydrogel network. The polymer–silver nanoparticle composite has been characterized by FT-IR, XRD and TEM analysis. The silver nanoparticles…
We focus on the proton-conducting doped - barium zirconate, which has large proton conductivity at intermediate temperature. We found here a phenomenon that acid - etching of the doped barium zirconate in a solution having a specific p H leaves a porous structure on the surface, and demonstrated power generation of hy…
PURPOSE: The aim of this work is to develop a 3D finite elements model to study the nanomechanical behavior of mineralized collagen microfibrils, which consists of three phases, (i) collagen phase formed by five tropocollagen (TC) molecules linked together with cross-links, (ii) a mineral phase (Hydroxyapatite), and (…
Various imaging technologies have become increasingly important in developing a better understanding of information on the biological and clinical phenomena associated with diseases of interest. Of these technologies, magnetic resonance imaging (MRI) is one of the most powerful for clinical diagnosis and in vivo imagi…
Cryogenic treatment (Cryo) is a supplementary process to improve the properties of metals like high carbon high chromium alloy tool steels (D-3) which are increasingly used in manufacturing high-performance cutting tools (dies and punches), blanking and punching tools, extrusion tools, parts of aerospace and automotiv…
Alumina nanotubes (ANTs) with unique fusiform morphologies were synthesized via a simple electrochemical route; the fluctuation of the electronic current density during the anodization process is considered to be the main reason for the formation of such new alumina nanostructures.
Dynamic octopus amphiphiles contain one charged "head," here a guanidinium cation, together several hydrophobic "tails" (or "tentacles") that can be attached and exchanged in situ by reversible hydrazone formation. Quite surprisingly, their ability to activate DNA as transporters in lipid bilayer membranes was found t…
Abstract During machining metals the material of the work piece is highly deformed and heated, which influences surface integrity. To simulate the machining process the thermo-mechanical material behavior in dependence of strain, strain rate and temperature has to be well known. One of the most used material models is…