Materials Literature
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First-principles computations have been preformed to investigate the stability of one-dimensional (1D) crystalline nanowires, faceted nanotubes, and conventional single-walled nanotubes (SWNTs) with various sizes, as well as the two-dimensional infinitely single layers for several wurtzite materials. Regardless of the…
Abstract The effect of partial replacement of silica or calcium carbonate (CaCO 3 ) by halloysite nanotubes (HNTs) on the curing behavior, tensile properties, dynamic mechanical properties, and morphological characteristics of ethylene propylene diene monomer (EPDM) composites was studied. Five different compositions…
Abstract The ethylene‐octene block copolymers in this study consist of long crystallizable sequences with low comonomer content alternating with rubbery amorphous blocks with high comonomer content. The crystallizable blocks form lamellae that organize into space‐filling spherulites even when the fraction of crystalli…
Amplified spontaneous emission (ASE) is demonstrated in volume-distributed feedback (DFB) structures, formed by colloidal CdSe/ZnS nanocrystals and ZrO2 nanoparticles (NPs) in a polymer matrix. Periodic redistribution of the NPs in an organic matrix was carried out by holographic photopolymerization in a specially dev…
Titania−silica composite films with a high content of crystalline titania phase and periodic mesoporous structure were fabricated by a low temperature “brick and mortar” approach. Pre-formed titania nanocrystals were fused with surfactant-templated sol−gel silica, which acts as a structure-directing matrix and as a ch…
The crystallization dynamics in wet-chemical synthesis is the key parameter controlling nanoparticle morphology, which determines the frequency of the optical plasmon resonance in metal nanoparticles. Despite several in situ (dark-field microscopy) and ex situ (electron microscopy) studies of metal nanoparticle growth…
Low carbon steel specimens cold rolled at ratios of 0-40% have been examined comprehensively by means of magnetic Barkhausen noise (MBN) method and a physical parameter obtained from a hysteresis loop, and their microstructures were studied by a transmission electron microscope. The behaviors of MBN and coercive force…
Progress in the development and application of nanoengineered systems is limited by the availability of quantitative measurement techniques. For the engineering of nanoparticle (NP)-based systems, single NP characterization is essential, but existing methods are slow and low throughput. We demonstrate a flow spectrosc…
A beautiful jewel of diamond is insulator. However, boron doping can induce semiconductive, metallic and superconducting properties in diamond. When the boron concentration is tuned over 3 × 10(20) cm(-3), diamonds enter the metallic region and show superconductivity at low temperatures. The metal-insulator transition…
Abstract We present accurate low‐dimensional models for real time simulation, control, and optimization of monolithic catalytic converters used in automobile exhaust treatment. These are derived directly by averaging the governing equations and using the concepts of internal and external mass transfer coefficients. Th…
Substituted barium ferrite BaFe$_{9}$(Mn$_{0.5}$Co$_{0.5}$Sn)$_{3/2}$O$_{19}$was prepared by sol-gel method. X-ray diffraction (XRD), transmission electron microscope (TEM), AC susceptometer, vibrating sample magnetometer (VSM) and vector network analyzer were used to analyze the structure, static and dynamic magnetic…
A single-crystalline sample of ${\text{BaFe}}_{2}{\text{As}}_{2}$ was prepared by high-pressure synthesis, and temperature dependence of resistivity was measured under high pressures of up to 9.0 GPa. Application of 3.0 GPa pressure suppresses the spin-density wave transition and induces superconductivity with the zer…
Abstract Microspheres consisting of carbonated hydroxyapatite (CHAp) nanoparticles and poly( L ‐lactide) (PLLA) have been fabricated for use in the construction of osetoconductive bone tissue engineering scaffolds by selective laser sintering (SLS). In SLS, PLLA polymer melts and crystallizes. It is therefore necessar…
The electrostatic layer-by-layer adsorption technique was used to fabricate silver nanoparticle (AgP)−organic dye composite films on indium−tin−oxide (ITO) electrodes. The degree of immobilization for the AgPs on the ITO electrode could be controlled by changing the immersion time of the electrode in the AgP aqueous c…
Abstract Aniline was polymerized in the presence of dodecylbenzene sulfonic acid (DBSA) as a functionalized protonic acid, in an aqueous medium to directly synthesize polyaniline (PANI)‐DBSA particles. DBSA acted as a dopant and a surfactant with stabilizing PANI‐DBSA dispersions by formation of strong hydrogen bonds.…
Intense near-infrared luminescence of Nd(3+) and Tm(3+) ions in the region of 860-1550 nm were achieved in 10-15 nm wurtzite ZnO nanocrystals fabricated by a facile sol-gel process. The optical properties of Nd(3+) and Tm(3+) ions were investigated by using the steady-state and time-resolved laser spectroscopy. Due to…
An effective method for the production of surface enhanced Raman scattering (SERS) active substrates is presented. Nanostructured silver thin films are pulsed laser deposited in an argon atmosphere. The films consist of arrays of nanoparticles whose size is controlled by the Ar pressure. The surface morphology of the…
4,4-Difluoro-3,5-bis(phenylamino)-8-(4-tolyl)-4-bora-3a,4a-diaza- s -indacene ( 1 ), a symmetric fluorescent difluoroboron dipyrromethene dye, has been synthesized by nucleophilic substitution of 3,5-dichloro-4,4-difluoro-8-(4-tolyl)-4-bora-3a,4a-diaza- s -indacene with aniline. The solvent-dependent spectroscopic and…
This manuscript focuses on the routes, methods and reagents used to synthesize triazine-based dendrimers. Our pursuit of macromolecular architectures for drug delivery—dendrimers based on triazines—has been an ongoing effort for 8 years. To date, we have produced complex dendrimers with diverse peripheries as proof-of…
Abstract A nanofibrous polyaniline (PANI) thin film was fabricated using plasma‐induced polymerization method and explored its application in the fabrication of NO 2 gas sensor. The effects of substrate position, pressure, and the number of plasma pulses on the PANI film growth rate were monitored and an optimum condi…