Materials Literature
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Environmental context. The growing use of nanotechnology means that nanomaterials are likely to be released into the environment, and their impact upon microbes, which form the biological foundation of all ecosystems, remains unclear. To understand how nanomaterials might affect bacteria in the environment, the intera…
Environmental context. Nanotechnology is a very important industry which may be socially transformative, but produces nanomaterials (NMs) which have a potential but poorly characterised risk to the environment. This Research Front describes new research investigating NM environmental chemistry, particularly in relatio…
Environmental context. The production and application of engineered nanoparticles is rapidly increasing, and development of suitable models for screening nanoparticles for possible toxic effects is essential to protect aquatic organisms and support the sustainable development of the nanotechnology industry. Here, the…
LaCoO 3 undergoes a transition from a nonmagnetic to a paramagnetic semiconductor at 80 K, associated with a spin-state transition of the Co3+ ions. It was proposed that the temperature of the spin-state transition depends strongly on the LaCoO3 lattice parameter, suggesting that strain can stabilize different spin st…
The peculiar catalytic activity of Au-supported titanium dioxide surfaces in the CO oxidation reaction has been a focus of interest for more than twenty years. Herein, recent data concerning preparation and structural characterisation of planar catalyst model systems consisting of single-crystalline titania and/or gol…
We demonstrate electrical control of the ferromagnetic resonance (FMR) in multiferroic nanostructures. A series of heteroepitaxial BiFeO3–NiFe2O4 nanocomposites of varying thickness are characterized using a microwave probe with magnetic and electric sensitivity. We apply an electric field to a sample and observe volt…
Paramagnetic solid-state NMR, extended X-ray absorption fine structure (EXAFS), and Raman spectroscopies, along with detailed quantum mechanical calculations performed with different density functional theory (DFT) functionals, are successfully applied to investigate the magnetic, structural, and vibrational propertie…
Abstract The objective of this study was to elucidate the role of hydroxyvalerate (HV) composition in polyhydroxy butyrate valerate (PHBV) copolymer film on the degradation of copolymer and osteoblastic cell activity. Degradation was studied by monitoring time‐dependent changes in mass and chemical composition of the…
Sensitive and fast ultraviolet sensor arrays have been produced by dielectrophoretic assembling of ZnO nanoparticles. The sub-micron device dimensions induce low operating voltage and low power consumption. The devices are long-term stable and operate in air, oxygen and nitrogen. We have determined the absorption and…
Abstract The low production rate of electrospinning process may limit the industrial use of single needle system. To meet high yield requirement and uniform fibers, a bottom‐up multiple jets electrospinning nozzle was designed, each nozzle can emit 6–18 jets. The influence of electric field interference on jet path, m…
In this work, we have studied bismuth as a dopant in graphene using density functional theory (DFT). We find that bismuth is weakly physisorbed within DFT. On the other hand, we show that bismuth n-dopes graphene when it is substitutional. We observe that local density approximation results give higher substitutional…
Abstract Amphiphilic copolymers of poly(dimethylsiloxane)‐poly(maleic anhydride‐vinyl ethyl ether) (PDMS/MA/VEE) were synthesized using a polydimethylsiloxane macroinitiator. The effect of these copolymers in the properties of a silicone pressure sensitive adhesive was evaluated. The addition of the copolymers resulte…
We report on high-field magnetization, specific heat, and electron-spin-resonance (ESR) studies of the quasi-two-dimensional spin-$\frac{1}{2}$ Heisenberg antiferromagnet $[\text{Cu}{(\text{pyz})}_{2}({\text{HF}}_{2})]{\text{PF}}_{6}$. The frequency-field diagram of ESR modes below ${T}_{N}=4.38\text{ }\text{K}$ is de…
Abstract BiFeO 3 thin films have been grown on large lattice mismatched substrates – LaAlO 3 (001) and MgO(001) – and their properties compared with those grown on SrTiO 3 (001) substrates. While epitaxial growth occurs on LaAlO 3 and SrTiO 3 substrates, the film grows highly textured on MgO substrate. In spite of the…
The single-phase ultrafine nanocrystalline SmCo(3) compound with a high coercivity of 33 kOe and a Curie temperature of 925 K was prepared using a simple and efficient method, which took advantages of the concurrent processes of nanocrystallization and densification during spark plasma sintering. The crystal structure…
The combination of the surface sensitivity of X-ray photoelectron spectroscopy (XPS) with the high flux and variable photon energy excitation of Synchrotron radiation (S-XPS) is used to probe the atomic distribution of bimetallic nanoparticles. Based on the energy dependence of the photoemission differential cross sec…
As demonstrated conceptually by first-principles calculations, the Rashba spin splitting in the $6p$ states of a Bi adlayer on ${\text{BaTiO}}_{3}(001)$ can be manipulated by the electric polarization in the ferroelectric substrate. Although this spin-electric effect is moderate, with a relative change in the splittin…
Abstract Bamboo tar is a natural resource of aromatic polyol obtained from a residue of by setting or distilling crude bamboo vinegar. In this study, the two‐packed polyurethane (PU) coatings were prepared by blending bamboo tar and castor oil varying with different weight ratios and polymeric toluene diisocyanate (PT…
Cambridge University Press 2009. 314 pp., hardcover £ 45.00.—ISBN 978-0521828956
Resonance Raman spectra (RRs) of tetra(4-aminophenyl) porphine (TAPP) were obtained, and density functional calculations were done to help the elucidation of the photorelaxation dynamics of Soret (B(x) and B(y) band) and Q(y) electronic transitions. The RRs indicate that the photorelaxation dynamics for the S(0) --> S…