Materials Literature
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Spherical shaped nanoparticles of series Y(2 - x)Eu(x)O(3) (x = 0.06, 0.10, 0.20, and 2) and Gd(2 - x)Eu(x)O(3) (x = 0.06, 0.10) were prepared by thermolysis of 2,4-pentanedione complexes of Y, Gd, and Eu. The bixbyite phase of Gd(2 - x)Eu(x)O(3) samples was formed at 500 degrees C, whereas the thermal decomposition o…
The use of yttrium aluminosilicate (YAS) glasses as vectors for radiotherapy is critically affected by the glass durability in a physiological medium. To understand the relation between glass composition, structure, and durability at an atomistic level, we have carried out classical molecular dynamics (MD) simulations…
Crystal and magnetic structures of BiMnO(3+delta) (delta = 0.03, 0.08, and 0.14) have been determined by the Rietveld method from neutron diffraction data at 8-10 and 290 K. BiMnO(3.03) (= Bi(0.99)Mn(0.99)O(3)) crystallizes in a monoclinic system (the refinement was performed in space group C2/c; Z = 8; a = 9.5313(3)…
Microcontainers with embedded superparamagnetic nanoparticles can be changed into bubble microreactors upon treatment with an alternating magnetic field, which acts as a remote trigger for the release of encapsulated material. Exchange of an arginine solution inside and H2O2 solution outside the microcontainers genera…
The performance of silver alumina catalysts and silver aluminate was studied in the selective catalytic reduction (SCR) of NO by propene. The use of boehmite during the impregnation step ensured a strong interaction between the silver species and the alumina surface in the final calcined catalyst. Thus, higher silver…
The basics of the Whole Powder Pattern Modeling and its implementation in the PM2K software are briefly reviewed. The main features and functionalities, and most common line broadening models are introduced with the aid of working examples related to the instrumental profile and to a plastically deformed metal. A summ…
The scaling relations for bubbles induced by different external sources are investigated based on a modified Rayleigh model and experimental observations. The equations derived from the modified Rayleigh model are presented to describe the collapse of bubbles induced by the different external sources such as electrica…
A modular ligand made of poly(ethylene glycol) appended with a thioctic acid anchoring group at one end and a maleimide at the other is synthesized and used to prepare maleimide-functionalized gold nanoparticles (AuNPs). This design allows effective conjugation of AuNPs to peptide-dye via maleimide–thiol coupling. By…
The controlled reversible switching between vapor−solid (VS) and vapor−liquid−solid (VLS) growth of ZnO nanowires (NWs) mediated by organic solvents, namely, ionic liquids (ILs), is demonstrated. Suppression or enhancement of the VLS mechanism is achieved by the control of Zn oxidation and ZnO reduction by the abundan…
We present a method for determining inelastic mean free paths (IMFPs) in materials using high-accuracy measurements of x-ray absorption fine structure (XAFS). For electron energies below 100 eV, theoretical predictions have large variability and alternate measurement techniques exhibit significant uncertainties. In th…
Cells and tissues are self-organized within an extracellular matrix (ECM) composed of multifunctional, nano- to micrometer scale protein fibrils. We have developed a cell-free, surface-initiated assembly technique to rebuild this ECM structure in vitro. The matrix proteins fibronectin, laminin, fibrinogen, collagen ty…
Magnetic structure of a multiferroic Y-type hexaferrite ${\text{Ba}}_{2}{\text{Mg}}_{2}{\text{Fe}}_{12}{\text{O}}_{22}$ with helical-spin structures propagating along [001] below 195 K has been extensively studied, using polarized and unpolarized neutron diffractions under transverse magnetic fields $B$ $(\ensuremath{…
We show that a nanoscale polymer solution electrojet can coil to form free-standing hollow pottery as the jet is focused onto a sharp electrode tip. A scaling law is given based on the balance of the electrostatic compression force and the elastic resistance to predict the coil radius and frequency as the functions of…
Thermal-transport properties of various graphene junctions and quantum dots with nanoscale width are systematically investigated by nonequilibrium Green's-function method. Thermal conductance is insensitive to the detailed structure of the contact region but substantially limited by the narrowest part of the systems.…
Multiple, coexisting hydrophobic compartments have been created in water using molecular self-sorting among mixtures of bolaamphiphiles with differently spaced urea groups in their hydrophobic parts. The selective incorporation of bisurea functionalized fluorescent probes showed that different bolaamphiphiles form sep…
Monolithic titania (TiO 2 ) with multiscale porous structures have been successfully prepared via the sol–gel route accompanied by phase separation utilizing a chelating agent and mineral salt. The TiO 2 gels obtained possess well‐defined macropores derived from spinodal decomposition and mesopores as interstices of a…
Topas is a powerful and flexible software suite for the analysis of powder diffraction (and other) data. In this paper we describe methods to interact with the software in efficient and customisable ways. We also provide brief details of a wiki site for sharing ideas and methods for this software (topas.dur.ac.uk). Fi…
Poly(D,L-lactide) synthesis using tin(II) 2-ethylhexanoate initiated ring-opening polymerization (ROP) takes over 30 hours in bulk at 120 °C. The use of microwave makes the same bulk polymerization process with the same initiator much faster and energy saving, with a reaction time of about 30 minutes at 100 °C. Here,…
Poly(amidoamine) (PAMAM) dendrimer nanobiotechnology shows great promise in targeted drug delivery and gene therapy. Because of the involvement of cell membrane lipids with the pharmacological activity of dendrimer nanomedicines, the interactions between dendrimers and lipids are of particular relevance to the pharmac…
The quantum dot (QD) concentration dependence of the optical properties of QD monolayers is shown to be dominated by F\"orster resonant energy transfer (FRET) from smaller to larger QDs in the ensemble. With increasing QD concentration a redshift of the peak emission wavelength, a shortening of the photoluminescence l…