Materials Literature
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Samples of (Sr 1.9−x Ba x )SiO 4 :Eu 0.1 were synthesized by a solid-state reaction. The maximum emission intensity under 460 nm excitation was obtained at a Ba content, x, of 1.6. All Sr 1.9−x Ba x SiO 4 :Eu 0.1 samples except for Ba 1.9 SiO 4 :Eu 0.1 exhibited a temperature-driven blue-shift of the emission band. Th…
An analysis of the electronic structure of the [Mn(II)Mn(III)(μ-OH)-(μ-piv)(2)(Me(3)tacn)(2)](ClO(4))(2) (PivOH) complex is reported. It displays features that include: (i) a ground 1/2 spin state; (ii) a small exchange (J) coupling between the two Mn ions; (iii) a mono-μ-hydroxo bridge, bis-μ-carboxylato motif; and (…
Using atomic force microscopy and Raman spectroscopy, we characterize the highly disordered morphology of single-layer and multilayer graphene sheets that results from long exposures to ozone molecules and oxygen radicals in an ozone generator. We identify a crossover from a nanocrystalline phase to an amorphous carbo…
Yellow-emitting NaCaPO(4):Mn(2+) phosphors were prepared by the Pechini sol-gel process. Under low voltage electron beam excitation, the NaCaPO(4):Mn(2+) phosphor screen shows bright yellow emission (centering at 560 nm due to the (4)T(1)→(6)A(1) transition of Mn(2+)) with the CIE color coordinate (0.428, 0.552), whic…
Coarse-grained (CG) molecular dynamics (MD) simulations were carried out to investigate the dynamics of 2.2 nm monolayer-protected gold nanoparticles (AuNPs) in solvents. The effects of ligand length, ligand terminal chemistry, solvents, and temperature were examined. It was found that AuNPs with unmodified alkanethio…
Using density functional theory (DFT), we have systematically calculated the equilibrium geometries, electronic structure, and electron detachment energies of Al(BH(4))(n=1→4) and Al(BF(4))(n=1→4) at the B3LYP/6-311+G(2d,p) level of theory. The electron affinities of Al(BH(4))(n) not only exhibit odd-even alternation,…
The plasmon coupling phenomenon of heterodimers composed of silver, gold and copper nanoparticles of 60 nm in size and spherical in shape were studied theoretically within the scattered field formulation framework. In-phase dipole coupled σ-modes were observed for the Ag-Au and Ag-Cu heterodimers, and an antiphase dip…
The production of unfunctionalized and nonoxidized graphene by exfoliation of graphite in a volatile solvent, 1-propanol, is reported. A stable homogeneous dispersion of graphene was obtained by mild sonication of graphite powder and subsequent centrifugation. The presence of a graphene monolayer was observed by atomi…
Systematic dc magnetization studies using the Banerjee criterion, Kouvel-Fisher, and magnetocaloric effect methods provide physical insights into the origin of the magnetic anomaly and the tunneling effect of europium on the ferromagnetic ordering in Eu${}_{8}$Ga${}_{16}$Ge${}_{30}$ type-I clathrates. We show that Eu$…
Direct experimental observation of spontaneous electron enrichment of metal d orbitals in a new transition metal oxide heterostructure with nanoscale dimensionality is reported. Aqueous chemical synthesis and vapor phase deposition are combined to fabricate oriented arrays of high-interfacial-area hetero-nanostructure…
Magnetically driven ferroelectric atomic displacements of the order of 10${}^{\ensuremath{-}3}$ \AA{} have been observed in orthorhombic (perovskite like) YMnO${}_{3}$ by a single-crystal synchrotron x-ray diffraction. The refined polar structure shows the characteristic bond alternation driven by the exchange stricti…
p-type ZnO nanowires (NWs) based on a simple hydrothermal technique with a lithium dopant are demonstrated. It is demonstrated that Li substitution of Zn occurrs because of thermally induced migration due to post-annealing in the presence of oxygen. The stable formation of p-type ZnO:Li NWs is revealed using a NW fiel…
Herein we report on diethylaminocoumarin (DEACM) as a new photoremovable protecting group for 2'-deoxyguanosine in oligonucleotides. An oligonucleotide with O(6)-DEACM-caged dG was synthesized and photochemically analyzed. The DEACM group shows superior photochemical properties at 405 nm with an uncaging efficiency (ε…
The self-assembly of diblock copolymers under soft confinement is studied systematically using a simulated annealing method applied to a lattice model of polymers. The soft confinement is realized by the formation of polymer droplets in a poor solvent environment. Multiple sequences of soft confinement-induced copolym…
We present a novel method for producing drawn metamaterials containing slotted metallic cylinder resonators, possessing strong magnetic resonances in the terahertz range. The resulting structures are either spooled to produce a 2-dimensional metamaterial monolayer, or stacked to produce three-dimensional multi-layered…
Biodegradable microcapsules with pH-responsibility were fabricated with host–guest interaction between β-cyclodextrin (β-CD) and adamantane (AD). Two biocompatible polymers, dextran- graft -β-CD (Dex- g -β-CD) and poly(aspartic- graft -adamantane) (PASP- g -AD), were assembled on CaCO 3 particles. Rhodamine B (Rh B) w…
A novel, bifunctional, quadruple hydrogen-bonding ureido-pyrimidinone (UPy) unit bridged by photochromic dithienylethene (1) has been synthesized, which affords linear assemblies in solution and undergoes concentration-dependent ring-opening polymerization. The two UPy functional groups of 1 can dimerize intramolecula…
Abstract A review is presented concerning the application of nanotechnology in the polymer food‐packaging sector. Emphasis is placed on the benefits of polymer nanocomposite materials in terms of their improved mechanical and processability properties but also in terms of more packaging‐oriented attributes, such as en…
Cubic boron nitride (c-BN) possesses a number of extreme properties rivaling or surpassing those of diamond. Especially, owing to the high chemical stability, c-BN is desired for fabricating electronic devices that can stand up to harsh environments. However, realization of c-BN-based functional devices is still a cha…
In this study, a scalable fabrication technique for controlling and maintaining the nanoscale orientation of gold nanorods (GNRs) with long-range macroscale order has been achieved through electrospinning. The volume fraction of GNRs with an average aspect ratio of 3.1 is varied from 0.006 to 0.045 in aqueous poly(eth…