Materials Literature
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Zinc and manganese complexes of porphyrin triads have been synthesized and are shown to be efficient as highly sensitive and selective tripod optical sensors for amines at the picomolar level.
Open-ended, multi-wall carbon nanotubes (CNTs) with magnetic nanoparticles encapsulated within their graphitic walls (magCNTs) were fabricated by a combined action of templated growth and a ferrofluid catalyst/carbon precursor, and tested as drug hosts. The hybrid nanotubes are stable under extreme pH conditions due t…
The magnetic structures adopted by the Fe and Sm sublattices in SmFeAsO have been investigated using element-specific x-ray resonant and nonresonant magnetic scattering techniques. Between 110 and 5 K, the Sm and Fe moments are aligned along the $c$ and $a$ directions, respectively, according to the same magnetic repr…
A twisted graphene bilayer consists of two graphene monolayers rotated by an angle $\ensuremath{\theta}$ with respect to each other. Theory predicts that charge-neutral twisted graphene bilayers display a drastic reduction of their Fermi velocity ${v}_{F}$ for $0\ensuremath{\lesssim}\ensuremath{\theta}\ensuremath{\les…
The biochemical and physiological importance of nitric oxide (NO) in signaling and vasodilation has been studied for several decades. The discovery of both protein-bound and free low molecular weight dinitrosyl iron complexes (DNICs) suggests that such compounds might play roles in biological NO storage and transport.…
Using density functional theory (DFT) we show that intrinsic ferromagnetism in two-dimensional (2D) carbon semiconducting structures can be achieved by linking triangular graphene nanoflakes (GNFs) with carbon chains containing an odd number of carbon atoms. The observed magnetism can be understood from the singlet-tr…
Laser-induced ultrafast spin manipulations in positively charged two-magnetic-center molecular ions with a small number of bridging atoms are investigated to explore the role of bridging atoms in the spin switching process and spin transferability between the magnetic centers via the $\ensuremath{\Lambda}$ process. Ta…
Carbon nanostructures consisting of corannulene/coronene-like pieces connected by atomic chains and doped with nitrogen atoms have been addressed by carrying out first-principles calculations within the framework of the spin-polarized density functional theory. Our results show that the conformation, charge distributi…
This paper reports the synthesis and superconducting behaviors of the tetragonal iron-chalcogenide superconductor FeSe. The electrical resistivity and magnetic moment measurements confirmed its superconductivity with a $T_c^{zero}$ and $T_c^{mag}$ at 9.4 K under ambient pressure. EPMA indicated the sample to have a st…
Titanium-based composites with in-situ calcium and phosphor phases were prepared by powder metallurgy processing with titanium and hydroxyapatite (HA) powders. The mixtures were performed in a friction mill with alcohol for 5 hours, dried in a rotating evaporator, pressed at 600 MPa and sintered at 1200 ºC for 2 hours…
In gas adsorption studies, porous glasses are frequently referred to as model materials for highly disordered mesopore systems. Numerous works suggest that an accurate interpretation of physisorption isotherms requires a complete understanding of network effects upon adsorption and desorption, respectively. The presen…
Controlling the water exchange kinetics of macrocyclic Gd(3+) chelates, a key parameter in the design of improved magnetic resonance imaging (MRI) contrast media, may be facilitated by selecting the coordination geometry of the chelate. The water exchange kinetics of the mono- capped twisted square antiprism (TSAP) be…
The development of targeted and triggerable delivery systems is of high relevance for anticancer therapies. We report here on reduction-sensitive liposomes composed of a novel multifunctional lipidlike conjugate, containing a disulfide bond and a biotin moiety, and natural phospholipids. The incorporation of the disul…
Cr${}_{2}$GeC thin films were grown by magnetron sputtering from elemental targets. Phase-pure Cr${}_{2}$GeC was grown directly onto Al${}_{2}$O${}_{3}$(0001) at temperatures of 700--800 \ifmmode^\circ\else\textdegree\fi{}C. These films have an epitaxial component with the well-known epitaxial relationship Cr${}_{2}$G…
We investigate electric and magnetic properties of graphene with rotationally symmetric strain. The strain generates a large pseudomagnetic field with alternating sign in space, which forms a strongly confined quantum dot connected to six chiral channels. The orbital magnetism, degeneracy, and channel opening can be u…
There is a growing demand for environmentally friendly alternatives for phosphonate-based crystal growth inhibitors (or antiscalants) used in reverse osmosis desalination, which are nontoxic, biodegradable, and free of phosphorus. The effectiveness of such an alternative, carboxymethyl inulin (CMI) biopolymers, in inh…
Materials with the formula Fe 2– x Y x Mo 3 O 12 ( x = 0.2, 0.4, 0.5, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, and 1.8) have been synthesized, and their structures, phase transitions, hygroscopicity, and thermal expansion properties have been studied by Raman spectroscopy, X-ray diffraction, and differential scanning calorimetry…
The apparent switching temperatures (Tsw,app), which need to be exceeded by the environmental temperature (Tenv) to initialize a shape-memory effect (SME) in magnetosensitive dual- or triple-shape composites, are systematically adjusted by application of a constant weak alternating magnetic field. This adaptation of T…
We report a strain-controlled tuning of magnetism in graphene decorated by transition-metal (TM) atoms. Our first-principles calculations demonstrate that strain can lead to a sudden change in the magnetic configuration of a TM adatom and the local atomic structure in the surrounding graphene layer. A strong spin-depe…
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) - PHBV is a biodegradable polyester which has been studied as an option for the production of disposable goods. Attapulgite is a fibrous clay mineral. The aim of this work was to produce and characterize renewable resource derived-nanocomposites based on PHBV and organophil…