Materials Literature
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Surface plasmon polaritons (SPPs) have been widely exploited in various scientific communities, ranging from physics, chemistry to biology, due to the strong confinement of light to the metal surface. For many applications, it is important that the free space photon can be coupled to SPPs in a controllable manner. In…
Large-scale electrolysis of water for hydrogen generation requires better catalysts to lower the kinetic barriers associated with the oxygen evolution reaction (OER). Although most OER catalysts are based on crystalline mixed-metal oxides, high activities can also be achieved with amorphous phases. Methods for produci…
We investigated the structural transformations of the hexagonal phase of Ge${}_{2}$Sb${}_{2}$Te${}_{5}$ under pressure by means of ab initio molecular dynamics with a variable simulation cell. To overcome the enthalpy barriers between the different phases we used metadynamics techniques. We reproduced the hexagonal-to…
We report the measurements of active and passive viscosities of a bent-core nematic liquid crystal. The active viscosity is measured using a rheometer and the passive viscosities are measured by measuring the self-diffusion coefficient of a microsphere in the aligned sample. The effective active viscosity is larger an…
The hyperbranched polymer-titania hybrid nanomaterial was synthesized by self-condensing vinyl polymerization (SCVP) of 2-(2-bromopropionyloxy)ethyl acrylate (BPEA) via atom transfer radical polymerization (ATRP) from TiO2 surface. First, the ATRP initiators were immobilized onto the TiO2 surface by the reaction betwe…
Impurity phases of CaMgSi 2 O 6 :Eu (CMS) phosphor have been investigated in detail by X-ray absorption fine structure (XAFS), ESR, X-ray diffraction (XRD) and photoluminescence (PL) analyses. XRD studies of CMS phosphor powders clarify the volume fraction of CMS, Ca 2 MgSi 2 O 7 , (Ca,Eu) 10 (SiO 4 ) 6 O 2 , and crys…
We present a study on the optimization of etch transfer processes for circuit relevant patterning in the sub 30 nm pitch regime using directed self assembly (DSA) line-space patterning. This work is focused on issues that impact the patterning of thin silicon fins and gate stack materials. Plasma power, chuck temperat…
Methanol solutions of iridium(III) tetra(p-sulfonatophenyl)porphyrin [(TSPP)Ir(III)] form an equilibrium distribution of methanol and methoxide complexes ([(TSPP)Ir(III)(CD3OD)(2-n)(OCD3)n]((3+n)-)). Reaction of [(TSPP)Ir(III) with dihydrogen (D2) in methanol produces an iridium hydride [(TSPP)Ir(III)-D(CD3OD)](4-) in…
Based on density functional theory with the generalized gradient approximation, a computational study is carried out to reveal the magnetism of the hexagonal boron nitride monolayers (h-BN) doped by 3d transitional metal atoms at boron-site. The magnetic moments and magnetic anisotropy energies (MAEs) of the most stab…
This study aimed to characterize different emulsions obtained by the addition of four thickening agents, using rheological measurements, beyond analyzing the emulsions by polarized light microscopy looking for liquid crystals on them. The addition of these four thickening agents did not modify the base emulsion rheolo…
Bioglycerol can be valorized to different products, among which epichlorohydrin is an important intermediate used in a variety of industries. Chloromethyl-1,3-dioxolane is one of the important pharmaceutical intermediates, which is obtained by cycloaddition reactions of epichlorohydrin with ketones. Chloromethyldioxol…
We have studied the effects of substituting nonmagnetic Ga${}^{3+}$ for Mn${}^{3+}$ on dielectric and magnetic properties in multiferroic YMn${}_{2}$O${}_{5}$. Upon Ga substitution, whereby only the Mn${}^{3+}$ ions are selectively replaced, the commensurate magnetic phase eventually disappeared owing to the disconnec…
The electrical, crystallization and thermal expansion behaviors of polyamide 610 (PA610)/multi-walled carbon nanotube (CNT) nanocomposites prepared by melt mixing were investigated. Electron microscopy (Scanning Electron Microscopy and Transmission Electron Microscopy) revealed that a good dispersion of CNT and CNT ne…
The hydrogen absorption and desorption of Ti53Zr27Ni20 icosahedral quasicrystal (ICQ) and Ti50Ni50 shape memory alloy (SMA) melt-spun ribbons was studied. Samples were exposed to hydrogen gas at 623 K and 4 MPa for 1000 minutes. The total capacity of hydrogen obtained for Ti53Zr27Ni20 and Ti50Ni50 was 3.2 and 2.4 wt.…
The solubility data of the quaternary system CsCl–TbCl 3 –HCl(∼7.6 mass %)–H 2 O at 298.2 K were determined, and the corresponding phase diagram according to central projection data on the trigonal basal face CsCl–TbCl 3 –H 2 O was plotted. The diagram includes three invariant points and four crystallization fields co…
Phase structure and ferroelectric properties of BiFeO3 (BFO) films grown on Pt(111) buffered glass substrates at various growth temperatures and oxygen pressures have been studied. The optimization of the 20-nm-thick Pt(111) bottom electrode enables BFO films to form perovskite single phase structure at reduced temper…
A high aspect ratio conical sub-wavelength structure (SWS) was designed by using rigorous coupled-wave analysis (RCWA) method and was realized on polymethyl methacrylate (PMMA) film using a stamping technique. The silicon template containing a hexagonal array of conical holes with a period of 350 nm and an aspect rati…
We experimentally investigate the mechanism of formation of self-assembled arrays of nanoislands surrounding dopant sources on the (001) surface of yttria-stabilized zirconia. Initially, we used lithographically defined thin-film patches of gadolinia-doped ceria (GDC) as dopant sources. During annealing at approximate…
The dispersed flower-like Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ phosphor with high brightness and long afterglow was prepared via hydrothermal-homogeneous coprecipitation route. The as-prepared phosphor exhibited a broad excitation band chiefly in visible and a broad emission band of main peak at 467 nm under the excitation…
Pt/graphene composites were synthesized by loading platinum nanoparticles onto graphene and etched at 1000 °C in a hydrogen atmosphere. This results in the formation of a dense array of nanostructured defect sites in the graphene, including trenches, nanoribbons, islands, and holes. These defect sites result in an inc…