Materials Literature
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Sharp knife edged copper oxide (CuO) nano architectures were directly grown on the surface of flexible carbon fabric by a facile chemical route with the assistance of nonionic surfactant PEG-6000. The carbon fabric substrate preserves its high flexibility even after the growth of the entire nanostructure. Moreover, it…
A highly crystalline polyethylene nanofiber is deflected by a cantilever under an atomic force microscope. The resulting approach and retract curves on both nanofiber and silicon substrate yield the Young's modulus of the nanofiber. The experiments show that the average Young's modulus of polyethylene nanofibers with…
NIR Ln( iii ) luminescence is effectively sensitized via visible light instead of destructive UV light in novel Ir–Ln polymers.
Analytical techniques based on surface-enhanced Raman scattering (SERS) suffer from a lack of reproducibility and reliability, thus hampering their practical applications. Herein, we have developed SiO2@Ag nanospheres as an effective SERS detection platform through in situ loading Ag nanocontacts onto the SiO2 nanosph…
Time-, angle-, and energy-resolved two-photon photoelectron spectroscopy is used to study image-potential states of weakly bound monolayer graphene on the noble-metal surfaces Pt(111), Au/Ir(111), Au/Ni(111), and Ir(100). Binding energies are increased relative to the substrates, and lifetimes are similar for all syst…
Quinacridone diimines 1–10 were synthesized by the condensation of anilines with alkyl substituted quinacridones (QA). Photophysical and electrochemical properties of the compounds were investigated. Unconventional behavior of absorption spectra suggested a decrease in π_conjugation within the QA skeleton as well as l…
Highly ordered silver nanodishes which consist of nanorings and a film were fabricated as surface-enhanced Raman scattering (SERS) substrates. Numerical simulation reveals the bottom film can dramatically enhance the local electromagnetic (EM) field in the ring cavity, due to the plasmonic interaction between the nano…
Iron substituted Cu2Zn(1-x)Fe(x)SnSe4 stannites were synthesized by reaction of the constituent elements and subsequent annealing, followed by densification by hot-pressing. The compositions for each specimen were confirmed with a combination of Rietveld refinement and elemental analysis. Refinement results indicated…
Aggregation-induced emission (AIE) and aggregation-enhanced emission (AEE) have recently been a hot research topic. Currently, efforts have been mostly made on low mass molecules. Their structure–property relationship has been well-established but no work on polymers has been reported, probably due to the harsh reacti…
Inorganic nanomaterials are conventionally synthesized under harsh environments like extremes of temperature, pressure and pH. These methods are eco-unfriendly, expensive, toxic, cumbersome, yield bigger particles which agglomerate due to not being capped by capping agents. In contrast, biological synthesis of inorgan…
A low temperature, one-pot route to iron-doped rare-earth chromite perovskite was proposed. Fe half-doped rare-earth chromites, REFe0.5Cr0.5O3 (RE = La, Tb, Ho, Er, Yb, Lu and Y) were prepared via a mild hydrothermal method and their magnetic properties were studied. All of these materials are well-crystallized and th…
Fabrication of p–n Cu 2 O homojunction films was demonstrated by multiple steps of electrochemical deposition (ECD) processing with the adjustment of the deposition periods. The deposited Cu 2 O films, p-type and n-type Cu 2 O films, using ECD processing were, respectively, characterized using several analytical tests…
One-pot system combining multi-reactions is used to synthesize novel porphyrin-glycopolymer conjugates. Sodium mercury amalgam is used to catalyze the reactions: 1) reduction of RAFT polymerized poly(2-(methacrylamido) glucopyranose) (PMAG), 2) converting protoporphyrin to protoporphyrinogen, 3) thiol-ene coupling rea…
Emamectin benzoate is highly effective against insect pests and widely used in the world. However, its biological activity is limited because of high resistance of target insects and rapid degradation speed in fields. Preparation and physicochemical characterization of degradable microcapsules of emamectin benzoate we…
The relationship between antiferromagnetic spin fluctuations and superconductivity has become a central topic of research in studies of superconductivity in the iron pnictides. We present unambiguous evidence of the absence of magnetic fluctuations in the nonsuperconducting collapsed tetragonal phase of CaFe2As2 via i…
We study the renormalization of the Fermi velocity by the long-range Coulomb interactions between the charge carriers in the Dirac-cone approximation for the effective low-energy description of the electronic excitations in graphene at half-filling. Solving the coupled system of Dyson-Schwinger equations for the dress…
Some aspects of the thermodynamics and mechanics of solid surfaces, in particular with respect to surface stress and surface energy, are reviewed.The purpose is to enlighten the deep differences between these two physical quantities.We consider successively the case of atomic flat surfaces and the case of vicinal surf…
La0.3 Sr0.7 FeO3-δ films undergo dramatic changes in electronic and optical properties due to reversible oxygen loss induced by low-temperature heating. This mechanism to control the functional properties may serve as a platform for new devices or sensors in which external stimuli are used to dynamically control the c…
The ultrafine ZnO nanoparticles/nanowires were successfully synthesized on a flexible and transparent substrate by an ultraviolet-light decomposition process. We demonstrate that water molecules can affect the morphology of ZnO nanostructures. An ultraviolet lamp (λ ~ 380 nm, 75 mW cm(-2)) can be used to irradiate Zn(…
A highly capacitive fullerene polymer is prepared electrochemically and its use in a high power supercapacitor is presented. Using the fullerene polymer as a negative charge-accepting electrode and poly(3,4-ethylenedioxythiophene) (PEDOT) as a positive electrode, it has an operating potential of 2.2 V and a power dens…