Materials Literature
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Reliable SERS: The fabrication of SERS-active metal structures with predictable and reliable signals is notoriously difficult. This problem is overcome by producing self-assembled nanoparticle–molecular monolayer plane junctions that generate remarkably reproducible SERS signals at the single-junction level (see figur…
Abstract We describe the chemical and electromagnetic enhancements of surface‐enhanced resonance Raman scattering (SERRS) for the pyridine molecule absorbed on silver clusters, in which different incident wavelength regions are dominated by different enhancement mechanisms. Through visualization we theoretically inves…
Single-crystalline, cubic ZrO2- and HfO2 nanobelts have been fabricated via a direct thermal-decomposition process under atmospheric pressure. The formation of cubic nanobelts can be controlled by varying the dopant concentration of nanobelt precursors, heating temperatures, and heating rates. The lanthanide-doped nan…
The mechanical properties of the vinyl ester reinforced with oil palm of empty fruit bunch fibers (EFB) laminated at different layer arrangements with glass fiber (CSM) composites were investigated. The EFB and CSM fibers were laminated at different layer arrangements and then were impregnated with vinyl ester resin u…
Polymer adsorption on cellulose nanofibrils and the effect on nanofibril water binding capacity were studied using cellulose nanofibril films together with quartz crystal microbalance with dissipation (QCM-D) and surface plasmon resonance (SPR). The experiments were performed in the immersed state, and special attenti…
Pectin-ZnO nanocomposite was prepared in the aqueous solution condition at room temperature. The Fourier transform infrared, X-ray diffraction, and transmission electron microscope (TEM) measurements confirmed the nanoscaled structure of pectin-ZnO composite. According to the TEM observation, the average composite gra…
In this report, we compare the temperature evolution of several physical properties of the relaxor systems, PZN, PMN and KTN. We show that three rather than two characteristic temperatures can be identified, T B , T* and T f , and discuss their meaning in light of dielectric, Raman and neutron scattering experimental…
Porous NiTi alloy samples were fabricated with 12-36% porosity from equiatomic NiTi alloy powder using laser engineered net shaping (LENS). The effects of processing parameters on density and properties of laser-processed NiTi alloy samples were investigated. It was found that the density increased rapidly with increa…
Macroporous ceramics are fabricated using emulsions stabilized with particles of various chemical compositions. Stabilization with particles hinders extensive droplet coalescence during solvent extraction, allowing for drying and sintering of the emulsions directly into macroporous materials in the absence of any chem…
Abstract A method of synthesis of liquid high‐molecular‐weight epoxy resins from modified vegetable oils as natural raw materials is proposed. The possibility of application of epoxidized soybean, rapeseed, linseed, and sunflower oils as well as hydroxylated soybean and rapeseed oils as raw materials in the fusion pro…
Cobalt nanotube arrays embedded in AAO templates are synthesized by direct electrodeposition with low current density. The nanotubes exhibit an hcp structure with the easy axis perpendicular to the tube. MFM imaging shows only a weak magnetic signal and SQUID measurements reveal sheared hysteresis for the field parall…
Abstract Czochralski growth of large metallic alloy single crystals of Al 13 Co 4 and Al 13 Fe 4 from Al‐rich solutions has been demonstrated for the first time. A detailed description of all decisive steps of the growth procedure is given with particular emphasis to seeding from a native phase as well as spontaneous…
The epitaxial thin films of LaFeAsO were fabricated on MgO(001) and mixed-perovskite (La,Sr)(Al,Ta)O3(001) single-crystal substrates by pulsed laser deposition using a Nd-doped yttrium aluminum garnet second harmonic source and a 10at.% F-doped LaFeAsO disk target. Temperature dependences of the electrical resistiviti…
Combining a piezoelectric/magnetostrictive laminated composite with a piezoelectric transformer (see figure) generates a giant magnetoelectric (ME) response. The output ME voltage is amplified by the additional piezoelectric transformer layer. The outstanding advantages of the proposed structure include giant ME volta…
We report on synthesis of a uniform and large area of a new form of ZnO nanocorals. These nanostructures can provide suitable electrical pathways for efficient carrier collection as well as large surface areas for the photoelectrochemical (PEC) cells. PEC devices made from these ZnO nanocoral structures demonstrate si…
We report a label-free porous silicon membrane waveguide biosensor based on a 1μm thick freestanding porous silicon film with 100nm diameter pores. The sensor operates in the Kretschmann configuration. A formvar polymer film provides robust adhesion of the porous silicon membrane to a rutile prism and enables confinem…
Abstract A simple synthesis method of silver nanoparticles and its application as an active surface‐enhanced Raman spectroscopy (SERS) colloid are presented in this work. The photoreduction of AgNO 3 in presence of sodium citrate (NaCit) was carried out by irradiation with different light sources (UV, white, blue, cya…
We study the properties of a tunable nonlinear metamaterial operating at microwave frequencies. We fabricate the nonlinear metamaterial composed of double split-ring resonators and wires where a varactor diode is introduced into each resonator so that the magnetic resonance can be tuned dynamically by varying the inpu…
Closely packed ZnO nanowire array was fabricated on a n-type Si (100) substrate by a magnetron cosputtering method. The ZnO nanowire/n-Si heterojunction showed good diode characteristics with rectification ratio of above 1.6×102 at 4V in the dark. Experiments demonstrated that the diode could be used to detect either…
By combining the methods of isotopic substitution in neutron diffraction and high-energy x-ray diffraction, we have determined partial structure factors of vitreous ${\text{SiO}}_{2}$. A discussion of the effect of systematic and statistical errors is presented. The experimental results are found to be in good (but no…