Materials Literature
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We demonstrate efficient coupling between plasmons in a single silver nanowire and nanocrystals doped with rare earth ions, α-NaYF4:Er(3+)/Yb(3+). Plasmonic interaction results in a sevenfold increase of the up-converted emission of nanocrystals located in the vicinity of the nanowires as well as much faster luminesce…
Composite "wet" alginate films were manufactured from alginate-carbohydrate solutions containing 5% alginate and 0.25% pectin, carrageenan (kappa or iota), potato starch (modified or unmodified), gellan gum, or cellulose (extracted or commercial). The "wet" alginate films were used as a model to understand co-extruded…
The interactions between nucleic acids and mineral surfaces have been the focus of many studies in environmental sciences, in biomedicine, as well as in origin of life studies for the prebiotic formation of biopolymers. However, few studies have focused on a wide range of environmental conditions and the likely modes…
Particle-polymer attractions in nanocomposites can cause significant heterogeneities in the polymer dynamics and remarkably impact the material properties. Dynamical perturbations are generally expected to be limited to interfacial polymer segments. However, composites with highly anisotropic nanoparticles usually exh…
We report on low-temperature scanning tunneling spectroscopy measurements on epitaxial graphene flakes on Au(111). We show that using quasiparticle interference (QPI) mapping, we can discriminate between the electronic systems of graphene and Au(111). Beyond the scattering vectors, which can be ascribed to the elastic…
Herein we report a series of porous organic polymers (POPs) synthesized through a Sonogashira cross-coupling reaction containing hexaphenylbenzene (HEX) and hexabenzocoronene (HBC) with varying peripheral substitution. We observed vastly different gas sorption properties depending on substituent size and the extent of…
We demonstrate the multilevel hierarchy of nanoscale wax crystals on nanowire (NW) structures that strongly repels not only water but also olive oil and hexadecane. We deposited C24F50-fluorinated wax (F-wax) using thermal evaporation on the surface of CuO NWs. Fluorinated wax crystals are self-assembled on the CuO NW…
A photoluminescence (PL) peak has been observed from a monolayer of transition metal dichalcogenide (TMD), which is known to be an ideal 2D semiconductor. The PL peak appears near the low-energy side of neutral free excitons with very sharp peak width (∼10 meV) at low temperature (83 K). Systematic temperature-depende…
We report the discovery of superconductivity in BiOFxBiS2, an isostructural compound of the REOFxBiS2 (RE: La, Nd, Pr, Ce, and Yb) superconductors. The parent compound, Bi2OS2, is nonsuperconductive. Superconductivity is observed in a wide range of F-doping content (0.06 x 0.27). The optimal F-doping concentration is…
A chiral time-reversal symmetry breaking $d+id$-wave superconducting state is likely to emerge in graphene doped close to the Van Hove singularity. As heavy doping procedures are expected to introduce defects, we investigate here the effects of microscopic defects on the $d+id$-wave superconducting state at the Van Ho…
Laminated biocomposites based on ramie fabric and poly(lactic acid) were prepared through hot compression molding followed by direct cooling (without heat treatment) or melt crystallization (with heat treatment). The effects of heat treatment and ramie fabric reinforcement on the thermal and mechanical properties of p…
A family of polyoxometalate compounds based on 1:13 polyoxoanions [MnV 13 O 38 ] 7–, organic molecules, and lanthanide cations, H[{La 2 (DMF) 5 (H 2 O) 4 }{MnV 13 O 38 }]·DMF·5H 2 O ( 1 ), H[{Ce 2 (DMF) 2 (H 2 O) 7 }{MnV 13 O 38 }]·0.5DMF·5.5H 2 O ( 2 ), H 2 [{K(H 2 O) 2 } 2 {Nd(DMF)(H 2 O) 3 }{MnV 13 O 38 }]·5H 2 O (…
A solution method for direct growth of mesoporous carbon-coated nickel nanoparticles on carbon fibers is demonstrated for flexible supercapacitors.
Mesoporous nickel hydroxide–nickel nanohybrids are successfully obtained <italic>via</italic> oxidation of Ni nanowire foams indirectly from coordination microfibers, and are successfully applied as high-performance supercapacitor electrodes.
The assembly behavior of narrowly dispersed poly(sodium acrylate) (PAAS) of different molecular weights with Gd( <sc>iii</sc> )-containing cationic metallosurfactants (MS) was investigated by DLS, TEM and relaxivity plotting.
Nanomaterials are defined as material consisting of particles, in an unbound state/as an aggregate/agglomerate, which for Z50% of the particles in the number size distribution have a size between 1 and 100 nm, according to the European Commission Recommendation on the definition of nanomaterial (European Commission, 2…
Current rectification is found in oxygen-substituted zigzag graphyne nanoribbon/hydrogen-terminated zigzag graphene nanoribbon heterostructure junctions, from the application of nonequilibrium Green's function formalism combined with density functional theory. This behavior could be tuned by varying the number and loc…
We report coexistence of high spin Co3+ and Co2+ in ceramic Co3TeO6 using X-ray Absorption Near Edge Structure (XANES), DC magnetization, and first principles ab-initio calculations. The main absorption line of cobalt Co K-edge XANES spectra, along with a linear combination fit, led us to estimate relative concentrati…
We use time-dependent density functional theory methods to discuss the absorption spectra, electronic transition properties, and photovoltaic performance of metalloporphyrin–polyoxometalates (POM) complexes for p-type dye-sensitized solar cells (DSSCs). The results show that the energy levels of the frontier molecular…
The presence of octyloxy chains in the <italic>o</italic> , <italic>o</italic> -, <italic>o</italic> , <italic>p</italic> - or <italic>o</italic> -positions, instead of bulky <italic>t</italic> -butyl groups at the <italic>m</italic> -positions of the four phenyl groups of β-substituted Zn <sup>II</sup> -tetraarylporp…