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。
We have studied phase formation processes in the R 2 O 3 -BaO-CoO = 0.5: 1: 4 (R = Y, Gd-Lu) systems at temperatures from 900 to 1100°C, optimized solid-state synthesis conditions for RBaCo 4 O 7 + δ (R114), and obtained single-phase samples for R = Y, Dy, Ho, Er, Tm, Yb, and Lu. The behavior of R114 (R = Y, Dy, Lu) m…
The occurrence of acoustic cavitation is incorporating a multitude of interdependent effects that strongly depend on the bubble size. Therefore, bubble size control would be beneficial for biological and industrial processes that rely on acoustic cavitation. A pulsed acoustic field can result in bubble size control an…
Au–Ag alloy nanoparticles (NPs) were prepared by the reduction of metal ion mixtures in aqueous sodium citrate solution using sodium borohydride (NaBH 4 ). The resulting Au–Ag alloy NPs were analyzed by various techniques. Alloy-attached chips for the detection of microorganisms were fabricated simply by the attachmen…
Organic/inorganic semiconductor heterojunctions are being explored in hybrid solar cells that take advantage of unique properties of both material systems. A key question concerns the mechanism of charge separation across the localized/delocalized semiconductor interface. Here we probe photoinduced charge transfer at…
Lead zirconate titanate Pb(Zr0.50Ti0.50)O3 (PZT) thin films were deposited by a polymeric chemical method on Pt(111)/Ti/SiO2/Si substrates to understand the mechanisms of phase transformations and the effect of film thickness on the structure, dielectric, and piezoelectric properties in these films. PZT films pyrolyze…
Seashells, the armor of one of the most ancient species, have demonstrated outstanding mechanical properties such as simultaneous strengthening and toughening. The seashells have also been proven to exhibit piezoelectric and ferroelectric properties, which may contribute to their mechanical behaviors and various funct…
The hyperpolarizabilities of three p-quinodimethane derivatives with low diradical character have been evaluated. As electron correlation effects rule the electric field response properties, wave function and density functional theory-based methods have been compared to benchmark values calculated with the coupled clu…
We highlight some practical aspects in the study of ferroelectric domains in lead-free modified (K,Na)NbO3 piezoceramics through Confocal Raman Microscopy (CRM). In addition, CRM allows the determination of the nature of domain walls and correlation between the structure and piezoelectric properties. The typical confi…
Here we present a simple approach for the controlled formation of one-dimensional and multiterminal nanotube junctions. We describe a facile bottom-up strategy for joining the ends of single-walled carbon nanotubes. The geometry of the junctions can be varied and controlled by linker-induced assembly of DNA-wrapped na…
We report density functional theory band structure calculations of graphene doped with group IV elements. A bandgap as high as 2.13 eV is calculated for a single layer of graphene doped with Si while Ge and Sn doping reduce this bandgap for equal doping concentrations. Bilayers of doped graphene are also studied and i…
Poly(methylene disulfide) and poly(ethylene disulfide) were synthesized from the polycondensation of methylene dichloride and ethylene dichloride monomers, respectively, in the presence of benzyltriethylammonium chloride as a phase transfer catalyst. The structures of the synthesized polysulfides were confirmed via th…
Pseudospherical copper ferrite particles 20 to 90 nm in average size were prepared by an aerosol method through condensation of iron and copper vapors in an inert-gas flow, followed by the oxidation of the resulting two-phase powder under heterogeneous combustion conditions to an almost single-phase product. The nanop…
Improved identification of trace organic compounds in complex matrixes is critical for a variety of fields such as material science, heritage science, and forensics. Surface-enhanced Raman scattering (SERS) is a vibrational spectroscopy technique that can attain single-molecule sensitivity and has been shown to comple…
A series of aryl-substituted β-diketonate adducts with 5,5′-di(heptadecyl)-2,2′-bipyridine has been synthesised. All the compounds exhibit a mesomorphic (smectic) behaviour. It has been shown that the metal ion does not drastically influence the mesophase type and the transition temperatures. A thin film of Eu(III) co…
Heterogeneities in the perfusion of solid tumors prevent optimal delivery of nanotherapeutics. Clinical imaging protocols to obtain patient-specific data have proven difficult to implement. It is challenging to determine which perfusion features hold greater prognostic value and to relate measurements to vessel struct…
Janus cages with a bilayer polymer–inorganic composite shell are synthesized by an emulsion interfacial self-organized sol–gel process followed by a polymer grafting onto the interior surface containing a vinyl group. Binary surfactants experience a phase separation to create transverse channels across the shell. The…
CuxM1−xFe2O4 (M=Co, Mn and Ni; x=0.0, 0.6 and 1.0) spinel type ferrite nanoparticles have been synthesized by cetyltrimethylammonium bromide (CTAB) assisted hydrothermal route using NaOH solution. The purity, structural characterization and magnetic properties have been investigated using the scanning electron microsc…
The synthesis of Sr2FeO3 through a hydride reduction of the Ruddlesden-Popper layered perovskite Sr2FeO4 is reported. Rietveld refinements using synchrotron and neutron powder diffraction data revealed that the structure contains corner-shared FeO4 square-planar chains running along the [010] axis, being isostructural…
Treatment of [Et 4 N][Tp*WS 3 ] ( 1 ) (Tp* = hydridotris(3,5-dimethylpyrazol-1-yl)borate) with [Cu(MeCN) 4 ]PF 6 and NH 4 PF 6 (molar ratio = 1:2:1) in excess pyridine (py) produced one discrete trinuclear cluster [Et 4 N][Tp*WS 3 Cu 2 (py) 3 ](PF 6 ) 2 ( 2 ). Reactions of 1 with [Cu(MeCN) 4 ]PF 6, NH 4 PF 6, and 4,4′…
Employing green methods in the design and synthesis of functionalized metallic nanoparticles poses significant challenges in terms of maintaining product integrity (size, shape, dispersity, and colloidal stability). In this study, the direct synthesis of cationic gold nanoparticles (GNPs) capped by low molecular weigh…