Materials Literature
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We propose a novel mechanism for generating electromagnetically induced transparency (EIT) in a symmetric metamaterial. The proposed metamaterial consists of double nanorod pairs, perpendicular to each other in the form of a 2-by-2 matrix. This metamaterial shows a polarization-independent EIT-like effect without brea…
In this study, we systematically investigate three-dimensional (3D) momentum ($\ensuremath{\hbar}k$)-resolved electronic structures of Ruddlesden-Popper-type iridium oxides ${\mathrm{Sr}}_{n+1}{\mathrm{Ir}}_{n}{\mathrm{O}}_{3n+1}$ using soft-x-ray (SX) angle-resolved photoemission spectroscopy (ARPES). Our results pro…
This paper reports the dielectric relaxation studies of carbon nanotubes loaded in polyester polymer matrix. The study was carried out in the frequency range between 100 Hz and 1 MHz at constant temperature, T = 300 K. The frequency dependence of the electrical data was treated in the frameworks of the impedance Havri…
Organotin complexes of type R2SnClL [where L = Schiff base obtained by the condensation of 2-(4-Bromo/Chloro-benzyloxy)-3-methoxy-benzaldehyde and nicotinic/isonicotinic hydrazides; R = Me, Et, Bu, and Ph] have been synthesized and characterized by elemental analysis, molar conductance, infrared and NMR (1H, 13C, and…
We studied the effects of postsynthesis thermal treatments on material properties of CH 3 NH 3 PbI 3 perovskite films and their photovoltaic performance. Kelvin probe force microscopy revealed the existence of a positive potential barrier at grain boundaries, which is known to be beneficial by suppressing carrier reco…
Two families of copolymers featuring varying percentages of hexyl thiophene-3-carboxylate, herein referred to as 3-hexylesterthiophene (3HET), were synthesized via Stille polymerization to generate a series of random poly(3-hexylthiophene- co -3-hexylesterthiophene) (P3HT- co -3HET) copolymers as well as a series of s…
A catalytic alkoxylation process to make higher molecular weight poly(propylene oxide) and poly(propylene oxide- co -butylene oxide) polyols containing greater than 65% of primary hydroxyl end groups is described. The one-pot method employs the double metal cyanide catalyst and tris(pentafluorophenyl)borane catalyst (…
Combining resistive switching and magnetoresistance in a system exhibits great potential for application in multibit nonvolatile data storage. It is in significance and difficulty to seek a material with resistances that can be stably switched at different resistance states modulated by an electrical field and a magne…
In order to test new procedures for the calculation of basic molecular properties, a properly validated database and computational method appropriate to the range of species at hand is essential. Here formation enthalpies of chemical species CmHnNpOq from their constituent atoms are computed by midlevel composite mode…
In this study we present a novel method of lithium ion battery electrode sample preparation with a new type of epoxy impregnation, brominated (Br) epoxy, which is introduced here for the first time for this purpose and found suitable for focused ion beam scanning electron microscope (FIB-SEM) tomography. The Br epoxy…
A diverse range of nickel-based coatings can be cathodically deposited from a classical Watts electroplating bath containing suitable additives by appropriate control over operational conditions. Modern nickel-based electrodeposits are concisely reviewed and can be seen to be longer-term developments from the publicat…
X-ray free-electron lasers (XFELs) deliver x-ray pulses with a coherent flux that is approximately eight orders of magnitude greater than that available from a modern third-generation synchrotron source. The power density of an XFEL pulse may be so high that it can modify the electronic properties of a sample on a fem…
Portlandite (Ca(OH) 2, CH) is the second most abundant hydrate formed in the reaction of Portland cement with water, making it an important component in the built environment. Formation of CH is closely linked to the growth of the main hydrate phase, calcium silicate hydrate (C–S–H), affecting the microstructure and p…
The inclusion complex (IC) of α-cyclodextrin (α-CD) with poly(ethylene glycol) (PEG) brush was investigated by neutron reflectometry and grazing-incidence wide-angle X-ray scattering. When the PEG brush was exposed to 10% aqueous α-CD solution, an IC consisting of randomly oriented α-CD polycrystals appeared. On the o…
Olefin cross-metathesis is an effective tool for the functionalization of biodegradable aliphatic polyesters through both pre- and post-polymerization of β-heptenolactone (βHL). Ring-opening polymerization of βHL accesses both homopolymers and novel copolymers, producing strong gradient copolymers with lactide. A tota…
The initial temper of the material may directly affect the whole creep age forming (CAF) process. In terms of creep deformation and stress relaxation, using the constant-stress creep aging and constant-strain stress relaxation aging tests, the relationship between initial temper and CAF formability is investigated for…
BACKGROUND: Curcumin is a yellow polyphenolic chemopreventive agent isolated from the rhizomes of Curcuma longa. It is approved as Generally Regarded as Safe by US FDA. Nonetheless, its clinical success is limited due to its poor aqueous solubility, fast metabolism and short biological half-life attributes. OBJECTIVE:…
Structural analyses of a flexible 1D MOF [Cu(BF 4 ) 2 (bpp) 2 ] (bpp =1,3-bis(4-pyridyl)propane) with/without guest molecules were performed by synchrotron powder X-ray diffraction analysis and single crystal structural analysis. The guest-free MOF is composed of 1D chains composed of Cu(II) ions and bpp ligands which…
The brittle fracture of rock with an angled crack under combined tensile and compressive loading conditions is studied using linear elastic fracture mechanics (LEFM). The modified maximum tangential stress criterion (MTSC) and the maximum shear stress criterion (MSSC) are used to check crack initiations in the tensile…
Proposals for superconductivity emerging from correlated electrons in the doped Hubbard model on the honeycomb lattice range from chiral $d+id$ singlet to $p+ip$ triplet pairing, depending on the considered range of doping and interaction strength, as well as the approach used to analyze the pairing instabilities. Her…