Materials Literature
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Here we describe the synthesis and magnetic characterization of a family of 2D polymetallic oxalate-bridged polymeric networks with general formula [M(II)(H(2)O)(2)](3)[M(III)(ox)(3)](2)(18-crown-6)(2) (M(III) = Cr, Fe; M(II) = Mn, Fe, Co, Ni; 18-crown-6 = C(12)H(24)O(6)). Depending on the nature of the trivalent meta…
The influence of heat treatment on the evolution of luminescence in silver exchanged zeolites is investigated under controlled atmosphere by using in situ fluorescence microscopy (see figure). The results indicate that the stable yellow Ag3n+ emitter is most efficiently created in a dry zeolite Y host. In zeolite A, t…
Organosilyl/-germyl polyoxotungstate hybrids [PW(9)O(34)(tBuSiO)(3)Ge(CH(2))(2)CO(2)H](3-) (1a), [PW(9)O(34)(tBuSiO)(3)Ge(CH(2))(2)CONHCH(2)C[triple bond]CH](3-) (2 a), [PW(11)O(39)Ge(CH(2))(2)CO(2)H](4-) (3a), and [PW(11)O(39)Ge(CH(2))(2)CONHCH(2)C[triple bond]CH](4-) (4a) have been prepared as tetrabutylammonium sal…
Ganz einfach lassen sich Filme aus Graphen- und Quantenpunkt(QD)-Schichten aus wässrigen Lösungen auf transparenten leitfähigen Indiumzinnoxid(ITO)-Substraten aufbringen. Graphen eignet sich dank seiner Struktur und günstigen Austrittsarbeit gut für die Sammlung und Übertragung durch Licht erzeugter Ladungen auf die E…
Abstract New dyes based on BODIPY and tetrazine fluorophores connected through a phenyl spacer have been synthesized and their absorption, emission and electrochemical properties characterized. BODIPY can be reversibly oxidized into a stable cation radical whereas tetrazine can be reduced to a stable anion radical. Th…
We investigate the effect that the intrinsic spin-orbit and the interlayer and intralayer Rashba interactions have on the energy spectrum of either an unbiased or a biased graphene bilayer. We find that under certain conditions, a Dirac cone is formed out of a parabolic band and that it is possible to create a ``Mexic…
Cigarette butts, one of the most ubiquitous forms of garbage in the world, need to be recycled because their toxicity can kill saltwater and freshwater fish. In this study, the cigarette butts are applied as corrosion inhibitors for N80 steel at 90 °C in hydrochloric acid. Weight loss and electrochemical techniques ar…
Biodegradable poly(ester amide) (PEA) biomaterials derived from α-amino acids, diols, and diacids are promising materials for biomedical applications such as tissue engineering and drug delivery because of their optimized properties and susceptibility for either hydrolytic or enzymatic degradation. The objective of th…
The effects of thermal annealing in inert Ar gas atmosphere of SiO 2 -supported, exfoliated single-layer graphene are investigated in this work. A systematic, reproducible change in the electronic properties of graphene is observed after annealing. The most prominent Raman features in graphene, the G and 2D peaks, cha…
Abstract Gold nanoparticles with different morphologies, such as spindle, octahedron, and decahedron were obtained by using different molar ratios of HAuCl 4 /HEPES in the presence and absence of surfactants at room temperature. These nanoparticles were characterized by X‐ray diffraction (XRD), transmission electron m…
We report the synthesis and characterization of ${\text{Pd}}_{\text{x}}{\text{TiSe}}_{2}$ via magnetization, resistivity, specific heat measurements, and low-temperature electron diffraction. At very low levels of intercalation, near ${\text{Pd}}_{0.01}{\text{TiSe}}_{2}$, the commensurate charge density wave transitio…
Hydrogen production by metal particles in water could provide a renewable energy cycle, if its reaction kinetics is accelerated. Here, ab initio molecular dynamics simulation reveals rapid hydrogen production from water by a cluster (or superatom) consisting of a magic number of aluminum atoms, Al{n} (for instance, n=…
Abstract In the present work, quaternary chitosans as water‐soluble compounds were prepared based on three‐step process. Schiff bases were firstly synthesized by the reaction between the amino groups of chitosan with aliphatic aldehydes followed by a reduction with sodium borohydride (NaBH 4 ) to form N ‐(alkyl) chito…
We study the phenomenon of change in carrier type in carbon nanotube field-effect transistors (CNFETs) caused by the atomic layer deposition (ALD) of a HfO(2) gate insulator. When a HfO(2) layer is deposited on a CNFET, the type of carrier changes from p-type to n-type. The so-obtained n-type device has good performan…
Single-layer graphene sheets are typically characterized by long-wavelength corrugations (ripples) which can be shown to be at the origin of rather strong potentials with both scalar and vector components. We present an extensive microscopic study, based on a self-consistent Kohn-Sham-Dirac density-functional method,…
In this article, we describe the synthesis and characterization of a series of spiropyran containing copolymers that were used as colorimetric sensors for a series of divalent metal ions. The composition of spiropyran contained in the polymer backbone was varied from 10-100 mol % to investigate the influence of free v…
Li(7)PS(6) and Li(7)PSe(6) belong to a class of new solids that exhibit high Li(+) mobility. A series of quaternary solid solutions Li(7)PS(6-x)Se(x) (0 < or = x < or = 6) were characterised by X-ray crystallography and magic-angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy. The high-temperature (HT) m…
Thermally stable superhydrophobic fabrics with multifunctionality were fabricated through the combination of sol–gel chemistry and electrospinning. MTES sols were electrospun into fibers, in which fiber morphology was controlled by the gelation time. The resulting superhydrophobic fabrics are not only very stable and…
We report temperature and thermal-cycling dependence of surface and bulk structures of double-layered perovskite Sr3Ru2O7 single crystals. The surface and bulk structures were investigated using low-energy electron diffraction (LEED) and single-crystal X-ray diffraction (XRD) techniques, respectively. Single-crystal X…
We studied the asymmetry between valence and conduction bands in single-walled carbon nanotubes through the direct observation of spin-singlet transverse dark excitons using polarized photoluminescence excitation spectroscopy. The intrinsic electron-hole $(e\text{\ensuremath{-}}h)$ asymmetry lifts the degeneracy of th…