Materials Literature
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In this work, we have developed a facile and inexpensive method to fabricate a superhydrophobic surface with hierarchical nano- and microstructures. The superhydrophobic surface was prepared through spin coating of a mixture of nano- and microsized calcium carbonate (CaCO 3 ) suspensions on a substrate, followed by mo…
Hierarchically mesoporous silica nanoparticles (HMSNs) with uniform morphology and structure and with a diameter of ca. 100-220 nm were facilely fabricated using water, ethanol and ethyl ether as cosolvents. Template extraction and amino-functionalization were performed toward the HMSNs. These hierarchical mesopores a…
Utilizing a hexadentate ligand platform, a high-spin trinuclear iron complex of the type ((tbs)L)Fe(3)(thf) was synthesized and characterized ([(tbs)L](6-) = [1,3,5-C(6)H(9)(NPh-o-NSi(t)BuMe(2))(3)](6-)). The silyl-amide groups only permit ligation of one solvent molecule to the tri-iron core, resulting in an asymmetr…
We use scanning superconducting quantum interference device (SQUID) microscopy to investigate the behavior of vortices in the presence of twin boundaries in the pnictide superconductor Ba(Fe${}_{1\ensuremath{-}x}$Co${}_{x}$)${}_{2}$As${}_{2}$. We show that the vortices avoid pinning on twin boundaries. Individual vort…
First members of a new family of heterometallic Mn/Ni complexes [Mn(2)Ni(3)X(2)L(4)(LH)(2)(H(2)O)(2)] (X = Cl: 1; X = Br: 2) with the new ligand 2-{3-(2-hydroxyphenyl)-1H-pyrazol-1-yl}ethanol (H(2)L) have been synthesized, and single crystals obtained from CH(2)Cl(2) solutions have been characterized crystallographica…
Reaction of In(CH 2 SiMe 3 ) 3 with H 2 N 2 Ts N py or H 2 N 2 Ts N OMe gave the five-coordinate indium alkyls In(N 2 Ts N py )(CH 2 SiMe 3 ) ( 14 ) and In(N 2 Ts N OMe )(CH 2 SiMe 3 ) ( 15 ). The corresponding reaction with H 2 N 2 Ts N Ph gave four-coordinate In(N 2 Ts N Ph )(CH 2 SiMe 3 ) ( 16 ). Reaction of H 2 N…
Direct, oxidizer-free substitution of the 3-hydrogen of BODIPY derivatives has been established through a vicarious nucleophilic substitution procedure. This methodology has been combined with a reversible Michael addition on nitrostyrenes to provide a novel, highly efficient entry to the valuable 3-styrylated BODIPY…
Poly(3-hydroxybutyrate) (PHB) is a polyester belonging to the family of polyhydroxyalkanoates, which accumulate in a wide variety of bacterial strains. PHB appears to be a biodegradable alternative to traditional petrochemical polymers such as polypropylene and polyethylene. In this work, we tested direct conversion o…
The stability is analyzed of the magnetic junction collinear configurations against small fluctuations under amplitude-modulated current with CPP mode. High spin injection is assumed. Under parametric resonance conditions, with the modulation frequency twice the precession frequency, instability is possible of one, or…
A distinctive feature of single-layer graphene is the linearly dispersive energy bands, which in the case of multilayer graphene become parabolic. A simple electrical transport-based probe to differentiate between these two band structures will be immensely valuable, particularly when quantum Hall measurements are dif…
Au catalysts with layered double hydroxide (LDH) as support were fabricated and the crystal faces feature of LDH platelets was revealed to have a crucial effect on the location and particle size of gold nanoparticles (AuNPs). A preferential deposition of AuNPs with a narrow size distribution was formed on the lateral…
Chirality, i.e., the right- and left-handedness of structure, is one of the key concepts in many fields of science including biology, chemistry and physics, and its manipulation is an issue of vital importance. The electron spins in solids can form chiral configurations. In perovskite manganites RMnO3 (R=Tb, Dy,...etc…
We performed a high-resolution angle-resolved photoemission spectroscopy study of the Tl 0.63 K 0.37 Fe 1.78 Se 2 superconductor ( T c =29 K). We show the existence of two electron-like bands at the M (π, 0)-point which cross the Fermi level at similar Fermi wave vectors to form nearly circular electron-like Fermi sur…
The island growth mode of Pt was employed to guide the forma-tion of PdPt alloy nanodots on gold nanorods (Au@PdPt NRs). Well-defined alloy nanodots, with tunable Pd/Pt ratios from 0.2 to 5, distribute homogeneously on the surface of the Au NR. Formation of nanodots shell leads to the red-shift and broadening of the l…
Novel poly(ethylene oxide)-graft-doxorubicin (PEO-g-DOX) prodrugs with DOX covalently conjugated to PEO via a pH-sensitive hydrazone bond were developed. PEO-g-DOX conjugates could be readily prepared in the following steps: (i) anionic ring-opening copolymerization of ethylene oxide (EO) and allyl glycidyl ether (AGE…
Molecular statics and dynamics simulations were used to study the mechanisms of sliding and migration of \ensuremath{\Sigma}3{112} incoherent twin boundaries (ITBs) under applied shear acting in the boundary in the face-centered-cubic (fcc) metals, Ag, Cu, Pd, and Al, of varying stacking fault energies. These studies…
Bi2Se3 is a topological insulator with metallic surface states residing in a large bulk bandgap. It is believed that Bi2Se3 gets additional n-type doping after exposure to atmosphere, thereby reducing the relative contribution of surface states in total conductivity. In this letter, transport measurements on Bi2Se3 na…
Using highly monochromatic synchrotron X-rays in the energy range from 10.5 keV to 100 keV the temperature dependence of nonproportionality and energy resolution of LaBr3 scintillators doped with 5% Ce3+ were studied at 80K, 295K, and 450K. Improvement of the proportionality and better energy resolution was observed o…
Non-proportional response of the scintillation yield of NaI:Tl was measured using highly monochromatic synchrotron irradiation ranging from 9 to 100 keV. Special attention is paid to the X-ray escape peaks. They provide us additional information about non-proportional response in the range 0.9 to 12 keV. A rapid varia…
We discuss the novel electronic properties of graphene under an external periodic scalar or vector potential, and the analytical and numerical methods used to investigate them. When graphene is subjected to a one-dimensional periodic scalar potential, owing to the linear dispersion and the chiral (pseudospin) nature o…