Materials Literature
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Abstract In this study, aligned poly(butylene carbonate) nanofibers were fabricated by electrospinning with a high‐speed transfer roller as the receiving device. Cold plasma treatment technology was applied to improve its hydrophilicity and activity to expand its application in biological materials. The morphology of…
Abstract The nonlinear optical properties of an azobenzene‐containing ionic liquid crystalline polymer were investigated using single‐beam Z ‐scan and optical Kerr effect (OKE). The polymer film exhibited large nonlinear absorption (∼10 −6 cm W −1 ) and nonlinear refraction (∼10 −11 cm 2 W −1 ) under 532 nm ps excitat…
We report on scanning tunneling microscopy and spectroscopy (STM/STS) investigations of graphene grown on a 6H-SiC(0001) substrate. Our STM images of a graphene layer on a step bunching of the SiC feature a (√3 × √3)R30° pattern of aromatic rings and well developed, sharp Van Hove singularities in the corresponding ST…
Gd5Si2.05−xGe1.95−xNi2x (2x = 0.08, 0.1) alloys were prepared by arc melting followed by annealing at 1273 K for 96 h. Mixed monoclinic Gd5Si2Ge2-type phase, orthorhombic Gd5Si4-type phase, and a small amount of Gd5Si3-type phase were obtained in these alloys. Gd5Si2.01Ge1.91Ni0.08 alloy undergoes a second-order trans…
Highly monodispersed CdSe quantum dots (QDs) were prepared without an injection procedure. A series of Cd salts of long chain fatty acids, including Cd-myristate (C14), Cd-palmitate (C16) and Cd-stearate (C18) was prepared, and all metallic precursors and surfactants were mixed together followed by increasing the temp…
The pattern configuration and interface structure in epitaxial BiFeO3-CoFe2O4 heterostructures grown on (010)pc NdGaO3 substrates have been investigated systematically by transmission electron microscopy and chemical analysis. The crystal orientation of CoFe2O4 variants was tuned to [111]CFO, while BiFeO3 kept [010]pc…
We study ' the excitation of plasmons due to the incidence of a fast charged particle that passes through a single-wall carbon nanotube. We use a quantized hydrodynamic model, in which the σ and π electron systems are depicted as two interacting fluids moving on a cylindrical surface. Calculations of the average numbe…
A series of polyurethanes were prepared from the maltose-ethylene glycol-diphenylmethane diisocyanate and used to construct a novel polyurethane electrode for the detection of dopamine. The polyurethanes were characterized by FT-IR, differential scanning calorimetry, and thermogravimetric analysis. The intrinsic visco…
We present experimental results of the time‐dependent Raman signal response of fluoranthene adsorbed on a naturally grown Ag nanoparticle ensemble, which serves as surface enhanced Raman scattering (SERS) substrate. In addition, SERS characteristics such as the concentration‐dependent calibration curves and the limit…
Abstract Novel water-dispersible, pH-stable, and biocompatible quantum dots were synthesized through the surface modification of silicon quantum dots (SiQDs) with monosaccharides. The presence of the monosaccharide on the surface of the SiQDs was recognized by fluorescence measurements using its complementary lectin (…
Polyacrylonitrile (PAN) gel fibers show great potential to be used as actuators due to their mechanical response to chemical stimuli. In this work the response of PAN gel fibers to pH variation is studied. Three commercial grade PAN fibers with different chemical composition are investigated. Fibers are stabilized at…
The swelling with supercritical carbon dioxide (sc‐CO 2 ) of thin films of polyimides having various structures was investigated. It was shown that the degree of swelling is significantly influenced by the solvent which was used for the synthesis of those polyimides, by the solvent which was used for the preparation o…
Ruthenium was deposited on SiO 2 /Si(001) substrates at 473 K by chemical vapor deposition (CVD) using triruthenium dodecacarbonyl with and without an overpressure of CO. Carbon monoxide was employed to inhibit the growth of previously nucleated islands to allow the formation of additional nuclei. Carbon monoxide also…
Abstract Novel low molecular weight poly(ester amide)s based on glycine and l ‐lactic acid with interest for the biomedical field were successfully prepared by interfacial polymerization, which is an easy and fast polymerization method. Preparation of the α‐amino acid based diamine, the l ‐lactic acid based diacyl chl…
Electrospinning generates nanofibres at speeds that often surpass those of conventional man-made fibre production. This makes control and manipulation of these nanofibres that much more difficult and challenging. However, to take full advantage of the superior properties of electrospun nanofibres, their production pro…
To reduce both the cost and the environmental impact of copper‐based thermal solar absorbers, we have investigated their possible substitution by bio‐based conductive polymer nanocomposite (CPC) elements. Our results show that carbon nanotubes (CNT) have no significant influence on polymers’ calorimetric properties su…
Using two kinds of carboxylate ligands with small but significant differences in steric size, symmetric and asymmetric Fe(II) and Ni(II) cubanes have been synthesized in a controlled fashion. Fast sweeping pulsed field measurements showed magnetization hysteresis loops for two cubane-type molecular complexes, [Ni4(μ-O…
We report the effect of magnetic field on the dielectric response in a relaxor ferroelectric and ferromagnetic composite (BaZr0.5Ti0.5O3)0.65-(CoFe2O4)0.35. Relaxor characteristics such as dielectric peak temperature and activation energy show a dependence on applied magnetic fields. This is explained in terms of incr…
The influence of guest atoms on thermal conduction in filled skutterudites was studied using ultrafast reflectance spectroscopy. Different filling species cause coupled vibrational modes between the guest atoms and the host lattice at different frequencies, which scatter phonons in different spectral spans. Using a De…
The converse magnetoelectric effect resulting from the electric-field-induced motion of 90° domain walls in a ferromagnetic film coupled to a single-domain ferroelectric substrate is described theoretically. To that end, the volume fractions of 90° domains with differently oriented in-plane magnetizations are calculat…