Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Novel conducting polymer composites of linseed‐oil‐based poly(urethane amide) (LPUA) were synthesized using nanostructured poly(1‐naphthylamine) (PNA). The combination of the electrically conducting PNA with LPUA was accomplished through different weight percent loadings (0.5–2.5 wt%) of the conducting polyme…
Mesoporous thin films comprised of interconnected nanocrystalline (anatase, 20 nm) TiO2 particles were functionalized with [Ru(bpy)2(deebq)](PF6)2, where bpy is 2,2'-bipyridine and deebq is 4,4'-diethylester-2,2'-biquinoline, or iron(III) protoporphyrin IX chloride (hemin). These compounds bind to TiO2 with saturation…
The magnetocaloric effect (MCE) and metamagnetic transition of LaFe11.5Si1.5 compound are studied by the measurement of magnetization, ac susceptibility, and heat capacity. The ferromagnetic order temperature is observed to be 196?K. The field-induced metamagnetic transition that causes a paramagnetic-to-ferromagnetic…
The fluorinated phenoxide OC6F5 forms the stable Eu(II) and Eu(III) derivatives (DME)2Eu(mu-OC6F5)3Eu(mu-OC6F5)3Eu(DME)2 and (DME)2Eu(OC6F5)3, as well as the heterovalent product (DME)2Eu(mu-OC6F5)3Eu(DME)(OC6F5)2, in redox reactions of Eu with HOC6F5 or in proton-transfer reactions of HOC6F5 with Eu(SPh)2. The divale…
Alkyl chain tethered bis-squaraines bind to Ca2+ ions through the participation of the negatively charged oxygen of the central cyclobutene moiety to form folded H-type aggregates. The initially formed Ca2+ complex is preorganized to facilitate cooperative allosteric binding of Ca2+, resulting in the formation of exte…
Intramolecular cyclocarbonylation reactions with palladium-complexed dendrimers on silica gel as catalysts are very effective for the synthesis of twelve- to eighteen-membered ring macrocycles. This process can tolerate a wide variety of functional groups, including halide, ether, ketone, and ester. The heterogeneous…
Suspended single crystal diamond devices, microdisks and beam structures, have been fabricated. Low energy boron ions (180keV) were implanted to create subsurface damage while maintaining an undamaged top surface; homoepitaxial growth was subsequently carried out on the material. The damaged layer was selectively remo…
Heterobimetallic molecular precursors [Ti4(dmae)6(mu-OH)(mu-O)6Cu6(OAc)9.H2O] (1) and [Zn7(OAc)10(mu-OH)6Cu5(dmae)4Cl4] (2) for the deposition of metal oxide thin films of Cu6Ti4O12 (Cu3TiO4, TiO2) and Cu5Zn7O12 (ZnO, CuO) were prepared by the interaction of Ti(dmae)4 with Cu(OAc)2.2H2O for 1 and tetrameric (N,N-dimet…
Infrared reflectivity, terahertz and Raman spectroscopy studies were carried out with two types of SrTiO 3 ceramic of mean grain size 1500 and 150 nm, and the results were compared with single-crystal data. Strong ferroelectric soft-mode stiffening was detected in the infrared data upon the decrease of the grain size,…
Abstract A novel approach for encapsulation of hydrophobic materials into a hydrophilic multifunctional shell is presented, based on combining an ultrasonic technique and a layer‐by‐layer protocol. Polyglutamate/polyethyleneimine (PEI)/polyacrylic acid (PAA) and polyglutamate/PEI/PAA/silver nanocontainers loaded with…
The redox properties of the phthalocyanine-like tetrakis(thiadiazole)porphyrazines, [TTDPzM] (M = MgII(H2O), ZnII, CuII, 2HI), were investigated by cyclic voltammetry, and their ground- and excited-state electronic properties were studied in detail by density functional theory (DFT) and time-dependent DFT (TDDFT) meth…
Recently, protein carriers based on nanomaterials have been highlighted in diverse biological applications such as protein extraction, separation, and delivery due to their facile gravimetric sedimentation in the aqueous phase and abundant surface functionalities, which were used as anchoring sites for proteins. From…
Abstract The construction of an electronic‐conductor/ionic‐conductor heterojunction in a well‐defined nanostructure is the basis of studying interfacial and bulk transport and the reactions of ions and electrons at the nanoscale level. An ionic‐conductor/metal (AgI/Ag) heterostructured nanowire array is easily fabrica…
Lumazine synthase is an enzyme involved in riboflavin biosynthesis in many plants and microorganisms, including numerous human pathogens. The fact that the enzymes of the riboflavin biosynthesis pathway are not present in the human or animal host makes them potential targets for anti-infective agents. The crystal stru…
We report results of an ab initio study on the stability of hydrogenated empty cages ${X}_{n}{\mathrm{H}}_{n}$ with $X=\mathrm{Si}$, Ge, and Sn, and $n=8$, 10, 12, 14, 16, 18, 20, 24, and 28. All these cages have large highest-occupied--lowest-unoccupied molecular orbital (HOMO-LUMO) gaps. The HOMO-LUMO gap for Ge cag…
Amine-functionalized, chiral mesoporous organosilicas were prepared from a rationally designed precursor, which combines the functions of a network builder, a chiral latent functional group, and a porogen in one molecule. The precursors are formed by a convenient enantioselective hydroboration using ( S )-monoisopinoc…
Polyaniline encapsulated and functionalized self-assembled gold nanoparticles have been synthesized using an interfacial polymerization approach. The polyaniline and gold nanoparticles were formed at the aqueous and organic interface and a directional growth of the self-assembled gold nanoparticles was observed. The r…
Large scale density-functional theory calculations have been performed to understand the spatial distribution and magnetic coupling of Cr-doped GaN, in which exhaustive structural and magnetic configurations have been investigated by doping of up to five Cr atoms in large supercells. Our results provide direct evidenc…
A positively charged polyvinyl N-methylpyridine (PVMP) polymer is patterned on a solid substrate via photochemical crosslinking, with the resultant cationic surface directing the adsorption of water-soluble Au nanoparticles, producing patterned nanostructured conductive films (see figure). These surfaces could be furt…
Block copolymers represent an exciting class of complex materials as they self-assemble into highly regular structures of nanoscopic dimensions. When prepared as thin films, such structures can be used for a variety of applications including lithographic masks or nanoporous membranes. Reported here are nanostructures…