Materials Literature
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In this paper three models of the shape memory alloy behaviour have been presented and re-investigated. The models are attributed to Tanaka, Liang and Rogers, and Brinson, and have been used extensively in the literature for studying the static or dynamic performance of different composite material structures with emb…
A novel and simple one-step solid state reaction in the presence of a suitable surfactant, triethanolamine (TEA), has been developed to synthesize uniform zinc oxide nanorods with an average diameter of 20 nm and length of 200 nm. In the absence of TEA the product samples contained nanoparticles. The formation of zinc…
In this paper we demonstrate the ability of inelastic (Raman) light scattering to probe polymerization transitions. We show that after proper treatment—that is, separating isotropic and anisotropic contributions and employing the reduced representation which removes the thermal population effect of vibrational energy…
A novel impregnation process using a supercritical fluid (SCF) solvent to generate size‐controlled Pt nanoparticles in micro‐ and mesoporous silica hosts with a uniform pore size (see Figure) is presented. The size of the Pt nanoparticles decreases with the pore size of silica hosts, and the SCFs are shown to be excel…
Four unique states of the photochromic hybrid shown in the Figure can be independently addressed using light energy as the only input. This system benefits from the photochromic properties of the 1,2‐dithienylcyclopentene and phenoxynaphthacenequinone scaffolds and represents the first quaternary photo‐switch in which…
A search for the best and most complete description of line-edge roughness (LER) is presented. The root mean square (rms) value of the edge (sigma value) does not provide a complete characterization of LER since it cannot give information about its spatial complexity. In order to get this missing information, we analy…
PhzD from Pseudomonas aeruginosa is an isochorismatase involved in phenazine biosynthesis. Phenazines are antimicrobial compounds that provide Pseudomonas with a competitive advantage in certain environments and may be partly responsible for the persistence of Pseudomonas infections. In vivo, PhzD catalyzes the hydrol…
Designed materials and new tools hold the key for future science and technologies. Building materials from the bottom up is complementary to traditional top-down materials processing, but requires a deep understanding of the individual molecular structures, their assemblies, and dynamic behaviors. This approach, using…
The interaction between individual nanotubes in MoS 2 bundles is investigated here using an atomic force microscope (AFM). Upon elastically deforming the ropes with the AFM, the value of the bending modulus of the MoS 2 tube ensemble could be evaluated. This is turn could be used to obtain a lower estimate of the shea…
A model is developed to predict the transient shape evolution of an ellipsoidal Newtonian droplet with interfacial tension, suspended in another Newtonian fluid with a different viscosity. Using the Eshelby equivalent inclusion theory [Eshelby (1957)], this model adds an approximate interfacial tension term to the exa…
Compositionally graded barium strontium titanate [(BaxSr1−x)TiO3—BST, x=0.75, 0.8, 0.9, and 1.0] thin films are fabricated by pulsed-laser deposition on a LaAlO3 substrate with (La0.7Sr0.3)MnO3 as the bottom electrode. A high dielectric permittivity and temperature characteristic without Curie–Weiss law are obtained.…
Wetting of porous templates by multi‐component mixtures followed by demixing and controlled morphology ripening is a universal method to prepare nanotubes with tailored wall morphologies (see Figure). This is demonstrated here exemplarily by means of palladium nanotubes with a specific nano‐roughness and porosity.
A novel crystalline mesoporous CdS semiconductor (see Figure) has been synthesized with the aid of a mesoporous silica template through a simple single precursor decomposition route at low temperature. The precursor used—cadmium thioglycolate [Cd 10 S 16 C 32 H 80 N 4 O 28 ]—is not only the Cd but also the S source. T…
Three novel hydrated rare earth polyborates, Ln[B 8 O 11 (OH) 5 ] (Ln = La−Nd) ( 1 ), Ln[B 9 O 13 (OH) 4 ]·H 2 O (Ln = Pr − Eu) ( 2 ), and Ce[B 5 O 8 (OH)]NO 3 ·3H 2 O ( 3 ) have been synthesized by using boric acid as a flux at 240 °C, starting from rare earth oxides or nitrates and an excess of boric acid. All these…
Starting from an amorphous C film, single-walled carbon nanotubes were obtained in situ in a high-resolution electron microscope by the combined effect of irradiation and axial strain. Ductile nanotubes developed either a junction or a linear chain of C atoms before failure. These facts have been put in direct evidenc…
In this paper we study the wedge disclination within the elastoplastic defect theory. Using the stress function method we found exact analytical solutions for all characteristic fields of a straight wedge disclination in a cylinder. The elastic stress, elastic strain, elastic bend-twist, displacement and rotation have…
Neutron elastic diffuse scattering experiments performed on $\mathrm{Pb}({\mathrm{Zn}}_{1/3}{\mathrm{Nb}}_{2/3}){\mathrm{O}}_{3}$ (PZN) and on its solid solution with ${\mathrm{PbTiO}}_{3}(\mathrm{PT}),$ known as PZN-$x\mathrm{PT},$ with $x=4.5$ and 9 % around many reflections show that diffuse scattering is observed…
We have studied the effective response of composites of spherical particles each having a dielectric profile which varies along the radius of the particles. We developed a first-principles approach to compute the dipole moment of the individual spherical particle and hence the effective dielectric response of a dilute…
We combine infrared reflectivity and EXAFS (Extended X-ray Absorption Fine Structure) techniques to study the solid solution La0.67Ca0.33MnO3 prepared by different methods yielding samples with different insulator-metal transition temperatures (TIM). While the small polaron analysis of the optical conductivity provide…
Angle-resolved photoemission spectroscopy and Auger electron spectroscopy have been applied to study the intercalation process of silver underneath a monolayer of graphite (MG) on Ni(111). The room-temperature deposition of silver on top of MG/Ni(111) system leads to the islands-like growth of Ag on top of the MG. Ann…