Materials Literature
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Methane was catalytically decomposed to hydrogen and highly graphitic carbon nanotubes, microfibers, microballs, and nano onions. Over Mo x –Ni(Fe,Co) y –MgO z , single-walled carbon nanotubes (SWNTs) and thin-walled carbon nanotubes (TWNTs) were produced; over Ni/Y, individually separated SWNTs were generated; over L…
Chlorinated butyl rubber composites were prepared by a compounding and vulcanizing process using phenolic resin (PF) as the vulcanizing agent and carbon black as filler. Instead of using the conventional vulcameter method to determine the vulcanizing parameters, the vulcanization temperature and time were obtained by…
Gold nanorods coated with poly(diallydimethylammonium chloride) (PDAC-GNRs) were used to observe the distribution of surface-enhanced Raman signals in live cells and generate distinct groups of surface-enhanced Raman scattering (SERS) spectra in different regions of the cells. Spectra with unique features were cluster…
Within the continuum model, i.e., the Dirac equation approach, we study the boundary states around the line defect in graphene in the quantum Hall regime. We find that the boundary states localize at the opposite sides of the line defect if they propagate toward the opposite directions. Meanwhile, some boundary states…
Combining group-theoretical analysis and first-principles density functional theory calculations, we confirm theoretically the antiferrodistortive phase transition in ultrathin SrTiO${}_{3}$ (001) TiO${}_{2}$-terminated films and compare it with a similar transition in the bulk. We demonstrate phonon softening at the…
Nickel-containing metal-carbon nanocomposites (Ni@C) synthesized by levitation melting in a flow of an inert gas-hydrocarbon mixture were used as catalysts of the hydrogenation of phenylacetylene (PA). The nanocomposites were characterized by X-ray photoelectron spectroscopy, simultaneous thermal analysis, and tempera…
Bilayers consisting of two SiOC films doped with Eu at different concentrations have been synthesized by magnetron cosputtering. The proper choice of annealing temperature allows us to avoid Eu diffusion and clustering, so that each layer maintains its optical properties. Under these conditions, the bilayer allows us…
Nanocomposites of copper phthalocyanine (CuPc) and ZnO nanoparticles (NPs) have been grown in situ in a colloidal solution of CuPc using zinc acetate as precursor and sodium hydroxide as precipitating agent. n-Type ZnO NPs form a network with p-type CuPc by donating electrons as evidenced by various techniques. Increa…
We studied the mechanism of the water–gas shift reaction (WGSR; CO + H 2 O → CO 2 + H 2 ) catalyzed by Co 6 @Au 32 core–shell nanoalloy using density-functional theory (DFT) calculations to investigate the bimetallic effects on the catalytic activation. The molecular structures and adsorbate/substrate interaction ener…
Liposomes are a class of nanovesicles that have been explored extensively in the biomedical arena for early diagnosis and treatment of disease. In recent years, several liposomal drug formulations have been clinically approved in oncology. In a modular approach, the properties of liposomes can be tailored for combined…
In this article, taurine, one of the small biomolecules associated with bone metabolism, is firstly utilized to induce the fabrication of nano-architectured conducting polypyrrole (NCPPy) on biomedical titanium in diverse pH values of phosphate buffer solution (PBS). Accordingly, the possible mechanism for the fabrica…
Three-dimensional hierarchical carbon nanocoil–graphite (CNC–GT) nanocomposite blocks were prepared by the growth of CNCs at the interlayer of expanded GT using chemical vapor deposition followed by hot-pressing. The distribution and density of the CNCs were tuned by vacuum impregnation for catalyst loading and growth…
We report on the observation of the reststrahl band-assisted photocurrents in epitaxial graphene on SiC excited by infrared radiation. The peculiar spectral dependence for frequencies lying within the reststrahl band of the SiC substrate provides a direct and noninvasive way to probe the electric field magnitude at at…
A novel strategy for the covalent coverage of the graphene surface with brush-like PMMA–SH or multidentate P(MMA-co-SEMA) copolymers by the thiol–ene click reaction is reported. The new graphene@polymer materials were characterized by FTIR and Raman spectroscopy, thermogravimetric analysis, and AFM, TEM and SEM. AFM i…
Bi 2 S 3 /Bi and Bi 2 Te 3 /Bi core–shell nanorods were successfully synthesized by a hydrothermal method using Bi 2 S 3 nanorods as the template. The thickness of the Bi shell was controlled by varying the reaction time or the Bi 2 S 3 -to-Te ratio. Phase-pure Bi and Bi 2 Te 3 nanorods were also obtained by this synt…
Metal-organic porous sheets, due to their unique atomic configurations and properties, represent a class of materials beyond graphene and BN monolayers. The Mo2-phthalocyanine-based sheet (Mo2Pc) is a new member of this porous organometallic family. Using density functional theory with hybrid functional for exchange-c…
Acrylic acid/fibrin hydrogel can mechanically stimulate cells when an external electrical field is applied, enabling them to migrate and align throughout the depth of the gel. The ability of electro-responsive polyacrylic acid (PAA)/fibrin hydrogel to promote collagen production and remodeling has been investigated by…
Rheological measurements have long been an invaluable technique in studying mechanical and structural properties of polymers. Measurements on dilute, noninteracting polymer solutions allow the determination of macromolecular structural information, such as molecular weight. This analysis has been complicated by molecu…
Long-wave infrared fibers are used in an increasing number of applications ranging from thermal imaging to bio-sensing. However, the design of optical fiber with low-loss in the far-infrared requires a combination of properties including good rheological characteristics for fiber drawing and low phonon energy for wide…
We present the application of an evolutionary genetic algorithm for the in situ optimization of nanostructures that are prepared by focused electron-beam-induced deposition (FEBID). It allows us to tune the properties of the deposits towards the highest conductivity by using the time gradient of the measured in situ r…