Materials Literature
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The topography and surface composition of thin films (ca. 100 nm) of a polystyrene- b -poly(ethylene oxide) (PS-PEO) block copolymer are investigated using a suite of complementary techniques, namely tapping mode atomic force microscopy (AFM), optical microscopy, X-ray photoelectron spectroscopy (XPS), neutron reflect…
Abstract The kinetics of crystallization induced by orotic acid (OA) and boron nitride (BN) as nucleating agents were investigated for bacterial poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyhexanoate)s (P(HB‐ co ‐HH)s) containing from 0 to 18% HH monomer units. The nucleation efficiency of these two chemicals was investigated…
Chiral Swiss rolls, consisting of a metal/dielectric laminate tape helically wound on an insulating mandrel, have been developed to form the basis of a highly chiral metamaterial. We have fabricated these elements using a custom-built machine, and have characterized them. We find that the permeability, permittivity, a…
In this paper, for the first time, the influence of internal moving fluid and compressive axial load on the nonlinear vibration and stability of embedded carbon nanotubes is investigated. The Euler–Bernoulli beam theory is employed to model the vibrational behaviour of an embedded carbon nanotube. The relationship of…
Surface enhanced Raman scattering (SERS) of pyridine adsorbed on Au@Pd core/shell nanoparticles has been investigated theoretically with quantum chemical method, generalized Mie theory and three-dimensional finite-difference time domain (3D-FDTD) method. We first studied the influence of the coated Pd on the electroni…
The LCAO-Xα method is extended to include spin-polarization and thus be applicable to complexes containing transition metals. In studies on the nickel atom and on nickel hydride the method is shown to be reliable and computationally efficient. These results are compared with similar Multiple Scattering Xα, Unrestricte…
Density-functional calculations have been performed on ${\text{BaTiO}}_{3}(001)$ bare, with adsorbed molecular water and hydroxylated surfaces in the case of surfaces having in-plane polarization. We show that in-plane-polarized ${\text{BaTiO}}_{3}(001)$ flat surfaces have very strong interaction energies with water a…
We report upper critical-field measurements in the metal-free-all-organic superconductor ${\ensuremath{\beta}}^{\ensuremath{''}}\text{\ensuremath{-}}{(\text{ET})}_{2}{\text{SF}}_{5}{\text{CH}}_{2}{\text{CF}}_{2}{\text{SO}}_{3}$ obtained from measuring the in-plane penetration depth using the tunnel diode oscillator te…
Abstract Here, a pyrolytically controlled antioxidizing photosynthesis coenzyme, β ‐Nicotinamide adenine dinucleotide, reduced dipotassium salt (NADH) for a stable n‐type dopant for carbon nanotube (CNT) transistors is proposed. A strong electron transfer from NADH, mainly nicotinamide, to CNTs takes place during pyro…
High-molecular-weight PTeMC and PHMC were prepared by the lipase-catalyzed polymerization of butane-1,4-diol or hexane-1,6-diol and diphenyl carbonate via the formation of a cyclic dimer by a green process. Cyclic carbonate dimers were prepared by the lipase-catalyzed condensation of diphenyl carbonate with butane-1,4…
Moisture management can be defined as the controlled movement of water vapor and liquid water (perspiration) from the surface of the skin to the atmosphere through the fabric. Wetting, wicking, and moisture vapor transmission (MVT) properties are the critical aspects for evaluating the comfort performance of textiles.…
Layer-by-layer (LbL) assembly, a technique that alternately deposites cationic and anionic materials, has proven to be a powerful technique for assembling thin films with a variety of properties and applications. The present work incorporates the antimicrobial agent cetyltrimethylammonium bromide (CTAB) in the cationi…
Gel formation by surfactant molecules is argued to be a process similar to micellization rather than crystallization; it is controlled by thermodynamics rather than kinetics. The properties of surfactant-based gels are compared with those of gels with crystalline fibrillar networks, and questions associated with the n…
Schottky barrier heights were calculated for a series of interfaces between transition metals and strontium titanate with the first-principles mixed-basis pseudopotential method based on density-functional theory. The process of interface formation was analyzed in a step-by-step procedure that enables one to distingui…
We report unusual photoluminescence (PL) behaviors in highly photoexcited SrTiO(3) crystals at low temperatures. The PL spectrum and dynamics show abrupt changes below 150 K in both nondoped and electron-doped SrTiO(3) samples. We clarified that the PL dynamics in both nondoped and electron-doped SrTiO(3) is well desc…
Step by step: The combined use of ESI mass spectrometry and complementary DFT approaches allows the proposal of a formation mechanism for the Lindqvist anion. The mechanism is based on successive aggregation steps of hydrogentungstate anion as the “building block” with subsequent protonation and water condensation. Th…
Neutron crystallography allows direct determination of the proton and deuteron positions of a macromolecule and its bound solvent. Key advances in neutron macromolecular crystallography have led to an expanding field addressing larger and more complex problems. In particular, improvements in neutron instrumentation, d…
The superconducting penetration depth lambda(T) has been measured in RFeAsO(0.9)F(0.1) (R = La, Nd) single crystals (R-1111). In Nd-1111, we find an upturn in lambda(T) upon cooling and attribute it to the paramagnetism of the Nd ions, similar to the case of the electron-doped cuprate Nd-Ce-Cu-O. After the correction…
Piperidinium, piperazinium and morpholinium cations have been used for the design of ionic liquid crystals. These cations were combined with several types of anions, namely bromide, tetrafluoroborate, hexafluorophosphate, dodecylsulfate, bis(trifluoromethylsulfonyl)imide, dioctylsulfosuccinate, dicyclohexylsulfosuccin…
Abstract Microcapsules for self‐healing applications were produced with a melamine‐urea‐formaldehyde (MUF) polymer shell containing two different healing agent candidates, 5‐ethylidene‐2‐norbornene (ENB) and ENB with 10 wt.‐% of a norbornene‐based crosslinking agent (CL), by in situ polymerization in an oil‐in‐water e…