Materials Literature
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This work exploits the localized surface plasmon resonance (LSPR) spectroscopy of noble metal nanoparticles to achieve sensitive and selective detection of biological analytes. Noble metal nanoparticles exhibit an LSPR that is strongly dependent on their size, shape, material, and the local dielectric environment. The…
This work discusses an issue caused by omitting the fourth-order zero-field splitting (ZFS) terms in the analysis of random-orientation EPR spectra. Eu(II)-doped strontium aluminates were employed as a model system of the S-state lanthanoid ions, which have relatively large second-rank ZFS components, comparable to th…
This paper studies the nanojet ejection process by spreading droplets on a solid surface using molecular dynamics simulation based on the Lennard-Jones potential. During the simulation, it was found that the spreading width increased as the aperture dimensions and time increased. An energy wave phenomenon was also fou…
A systematic investigation of magnetic and transport properties is carried out for ${\mathrm{La}}_{2/3}{\mathrm{Ca}}_{1/3}{\mathrm{MnO}}_{3}$ granular system. Based on the magnetization measurement, it is argued that oscillatory indirect magnetic exchange coupling via the boundary material with thickness s sandwiched…
The radical oxygen can be generated in the lattice of the new aluminum silicate, Ca12Al14-xSixO33+0.5x, with different Al/Si ratios. The three-dimensional structure of Ca12Al14-xSixO33+0.5x yields positively charged tetrahedral frameworks having molecular size pores occupied by charge-balancing dioxygen species such a…
The relative distribution of rare-earth ions R 3+ (Dy 3+ or Ho 3+ ) in the phosphate glass RAl 0.30 P 3.05 O 9.62 was measured by employing the method of isomorphic substitution in neutron diffraction and, by taking the role of Al into explicit account, a self-consistent model of the glass structure was developed. The…
Monodispersed spherical polycrystalline cadmium sulfide particles were synthesized by precipitation in acidic aqueous solutions during the thermally controlled reaction between cadmium nitrate and thioacetamide. The effects of the concentration of the components and of the nitric acid on the colloidal growth dynamics…
Novel pyridine-based nitronyl nitroxide (NIT) biradicals, 3,5-bis[4-(1-oxyl-3-oxo-4,4,5,5-tetramethylimidazolin-2-yl)phenylethynyl)]pyridine (1) and 2,6-bis[4-(1-oxyl-3-oxo-4,4,5,5-tetramethylimidazolin-2-yl)phenylethynyl)]pyridine (2), and monoradicals, 4-(5-bromopyridine-3-ylethynyl)-1-(1-oxyl-3-oxo-4,4,5,5-tetramet…
Abstract A photopolymerization process at room temperature was devised to copolymerize vinyl acetate (VAc) and n‐butyl acrylate (BA) mainly to prepare rubber‐like damping sheet bearing pressure‐sensitive adhesive property in this study. The investigations using both the differential scanning calorimeter and rheometric…
Abstract Polycarbonate (PC)/acrylonitrile–butadiene–styrene (ABS) polymer alloy/montmorillonite (MMT) and nylon 6 (PA6)/ABS polymer alloy/MMT nanocomposites were prepared using the direct melt intercalation technique. Their structures were characterized by XRD and TEM. The results of TEM show that the silicate layers…
The transport of weak acid/base molecules through ultrathin films of polyelectrolyte complex formed by the multilayering method was measured by electrochemical means. The net flux of probe molecule through multilayers is a linear combination of all forms in which that probe is found. Neutral molecules are able to trav…
For the first time, an organic dye, morin, and another bio-macromolecule, human serum albumen (HSA), were embedded in porous alumina (P-Al) fabricated by anodization in oxalic acid. The photoluminescent (PL) spectra of morin and morin-HSA immersed in the P-Al pores were measured and compared with those of liquid solut…
The Raman spectra of Sandia Octahedral Molecular Sieves Na 2 Nb 2 - x M x O 6 - x (OH) x •H 2 O (M = Ti, Hf; x ≤ 0.2) (SOMS−Ti and SOMS−Hf) and their parent compound Na 2 Nb 2 O 6 •H 2 O (SOMS) were measured between 24 °C and 600 °C. The spectra of all three materials as well their variations with temperature are almo…
Treating the relaxation dynamics of an ensemble of random hyperbranched macromolecules in dilute solution represents a challenge even in the framework of Rouse-type approaches, which focus on generalized Gaussian structures (GGSs). The problem is that one has to average over a large class of realizations of molecular…
In this work, we report the results obtained during the condensation of various benzaldehydes with ethyl acetoacetate and urea or thiourea, in the presence of a bentonitic clay as catalyst. These reactions were performed under solventless conditions with infrared radiation as the energy source. Both Biginelli and Hant…
Abstract The influence of lignin (L) on the thermal properties and kinetics of crystallization of isotactic polypropylene (PP) is reported in this article. PP blends containing 5 and 15 wt % of L were prepared by mixing the components in a screw mixer. An increase of the thermal degradation temperature of the blends w…
Abstract In Y 2 SiO 5 :Pr 3+ crystals (0.1 at%, 0.3 at%, 0.6 at% , and 1.8 at% Pr 3+ ) characterized by the existence of two types of Pr 3+ optical centers, the energy transfer has been investigated using time‐resolved site‐selective spectroscopy techniques. The results obtained show that at certain conditions there a…
Supercritical fluid decomposition of copper precursors in the presence of hexagonal mesoporous silica matrices are used to prepare ordered copper metal nanowire and nanotube arrays. Evidence is presented which shows that the pore-filling process is accompanied by large expansions of the pore-to-pore distance induced b…
Abstract Solubility and diffusion data are presented for methane and carbon dioxide gases in high‐density polyethylene. The polymer was cut from extruded piping intended for use in offshore oil and gas applications. The measurements were carried out with a high‐pressure microbalance. The properties were determined fro…
Crowning Glory: Twelve μ2-sulfur donors are located above and below an Ni6 ring to form a double crown cluster (see picture). This [12]metallacrown-6 nickel(II) cluster was synthesized by spontaneous self-assembly from 2-sulfanylethanol, carbon bisulfide, NaOH, and NiSO4. The hydroxy groups of 2-sulfanylethanol form s…