Materials Literature
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Mathematical arguments are presented that give a unique answer to the question in the title. Subsequently, the mathematical analysis is extended using results of detailed model calculations that, in addition, throw further light on the consequences of the analysis. Finally, through a comparison with various recent stu…
The static dielectric response of C60, C180, C240, C540, C720, C960, C1500, and C2160 fullerenes is characterized by an all-electron density-functional method. First, the screened polarizabilities of C60, C180, C240, and C540, are determined by the finite-field method using Gaussian basis set containing 35 basis funct…
We report measurements of the x-ray scattering intensity as mesoporous glasses are filled with Neon. We outline a simple model to account for the non-linear increase in the intensity of the first peak in a liquid-like diffraction pattern as a monolayer is formed. This allows us to demonstrate an approach for surface a…
We report on the effect of electric field on the photoluminescence, PL, from a composite consisting of a conjugated polymer mixed with zinc oxide nanoparticles. We have found that in the absence of electric field PL emission from the composite film has two maxima in the blue and green-yellow regions. Application of a…
We demonstrate a unique prospect for inducing anisotropic vortex pinning and manipulating the directional motion of vortices using the stripe domain patterns of a uniaxial magnetic film in a the superconducting/ferromagnetic hybrid. Our observations can be described by a model, which considers interactions between mag…
We investigate the effect that potassium intercalation has on the electronic structure of copper phthalocyanine (CuPc) molecular crystals by means of ab initio density functional calculations. Pristine CuPc (in its $\ensuremath{\alpha}$ and $\ensuremath{\beta}$ structures) is found to be an insulator containing local…
Novel binderless carbon nanotube aerogel (CNAG) electrodes are developed. The materials exhibit a remarkable specific surface area of 1059 m2 g–1 with a special textural porosity with almost equal amounts of mesopores and micropores. These nanostructured CNAG electrodes (see figure) have a wide range of potential appl…
By solving the kinetic spin Bloch equations, we study the time evolution of the transient spin grating, whose spin polarization varies periodically in real space, confined in (001) GaAs quantum wells. With this study we can investigate the properties of both the spin transport and the spin relaxation at the same time.…
Novel donor–acceptor-type polymers, PTBPEQ and PDPEQ, are synthesized and shown to be neutral-state green polymeric materials with excellent transmissive oxidized states. Exceptional long-term stability even after 5000 cycles, ease of electrochemical synthesis, and extremely fast switching times make these polymers pa…
The impact of manufactured nanomaterials on human health and the environment is a major concern for commercial use of nanotechnology based products. A judicious choice of selective usage, lower nanomaterial concentration and use in combination with conventional therapeutic materials may provide the best solution. For…
Gold nanoparticles (AuNPs) with a size of 13.5 nm were synthesized using well-established methods as described earlier by Turkevich (Turkevich, J.; Stevenson, P. C.; Hillier, J. Discuss. Faraday Soc. 1961, 11, 55-75) and Frens (Frens, G. Nature (London), Phys. Sci. 1973, 241, 20-22) using citrate as the reducing agent…
Sub-micrometer meatball-like Au particles provide a very interesting mesoscopic regime in which their optical responses are determined by both the mesoscopic size and the particle's nanoscale surface roughness. The unique optical properties of these mesoscopic particles and particle arrays hold great potential in chem…
The work function of carbon nanotubes might depend on their diameters and the number of walls, and be different for their tips and sidewalls. Here we report the work function measurement of single-walled, double-walled, and multiwalled carbon nanotubes by investigating the thermionic emission from the middle of their…
Periodic mesoporous organosilica magnetic hollow spheres (PMO–MHS) are synthesized. The particle size, shell wall thickness and saturation magnetization value of PMO–MHS are tunable by varying the ratio of templating agent to magnetic nanoparticles. The high saturation magnetization ensures that these functional mesop…
Carbon nanotubes are a nanomaterial that is extensively used in industry. The potential health risk of chronic carbon nanotubes exposure has been raised as of great public concern. In the present study, we have demonstrated that intratracheal instillation of 0.5 mg of single-walled carbon nanotubes (SWCNT) into male I…
Abstract Density is an important parameter that influences the properties and performances of rigid polyurethane foam (PUF). Rigid PUF with different densities were prepared by varying the amount of distilled water as blowing agent. This investigation reports the mechanical, morphological, water absorption, thermal co…
The use of an ion gel as the gate insulator in polymer TFTs is described. The ion gel is composed of an ionic liquid and a triblock copolymer, and provides a very large specific capacitance, which allows both low voltage operation and high transconductance. Ion-gel-gated TFTs can be switched at a rate of 1 kHz and the…
We report discovery of collinear-magnetism-driven ferroelectricity in the Ising chain magnet ${\mathrm{Ca}}_{3}{\mathrm{Co}}_{2\ensuremath{-}x}{\mathrm{Mn}}_{x}{\mathrm{O}}_{6}$ ($x\ensuremath{\approx}0.96$). Neutron diffraction shows that ${\mathrm{Co}}^{2+}$ and ${\mathrm{Mn}}^{4+}$ ions alternating along the chains…
A controlled and up-scalable biosynthetic route to nanocrystalline silver particles with well-defined morphology using cell-free aqueous filtrate of a non-pathogenic and commercially viable biocontrol agent Trichoderma asperellum is being reported for the first time. A transparent solution of the cell-free filtrate of…
An investigation of the synthesis of the Sm5(Fe1−xCox)17 (x=0–0.3) phase and its magnetic properties is presented. The Curie temperature of the amorphous Sm5(Fe,Co)17 melt-spun ribbon phase increases with increasing cobalt content of the Sm5(Fe,Co)17 melt-spun ribbon. Heat treatment of amorphous Sm5(Fe,Co)17 melt-spun…