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。
Barium zinc borosilicate glasses with a molar composition x BaO ‐(60− x ) ZnO ‐30 B 2 O 3 ‐10 SiO 2 , where x ranged from 0 to 60 mol%, were prepared using melt‐quenching method. The effect of BaO substitution for ZnO on the sintering, crystallization, and dielectric characteristics has been investigated. The behavior…
We investigated the physical processes underlying the degradation of poly(3-hexyl-thiophene):phenyl-C61-butyric acid methyl ester (P3HT:PCBM) photovoltaics under harsh environmental conditions during a 70-70-70 test (70% humidity at 70 °C from 0 to 70 h) using a variety of analytical techniques aimed at monitoring moi…
We have explored the structural, magnetic, and thermoelectric properties of the CePd3−xPtx (0 < x < 1) solid solution. The similar chemical properties of palladium and platinum appear to result in a minimal perturbation to the intermediate valent state that is responsible for high Seebeck coefficient, while the large…
Dislocation is a lattice imperfection of crystalline materials. Dislocation movement is induced during plastic deformation and influences the mechanical properties. Although the role of dislocation in mechanical properties has been well understood, the role of dislocation in electrical properties is completely lacking…
We report a systematic study of the near-infrared intersubband absorption in AlGaN/GaN superlattices grown by plasma-assisted molecular-beam epitaxy as a function of Si-doping profile with and without δ-doping. The transition energies are in agreement with theoretical calculations including many-body effects. A dramat…
We report silicon heterojunction solar cells with conversion efficiencies exceeding 21% using appropriately designed emitter structures comprised of highly doped thin epitaxial layers grown by plasma-enhanced chemical vapor deposition at temperatures close to 200 °C. We show that at a given doping concentration, there…
Abstract A kinetic model is developed mimicking experimental results obtained via detailed kinetic investigation of Cu0‐mediated LRP processes of butyl acrylate in variable solvents at 50 °C. In all polymerizations, a pronounced offset in the $\overline {M} _{{\rm n}} $ versus conversion profile is observed. The kinet…
Molecules that change their structure in response to a stimulus such as light or an added chemical can act as molecular switches. Such switches can be chemically linked to other active moieties to create molecular "devices" for various purposes. There has been much activity of late in the use of molecular switches suc…
Abstract The NCX‐NCI‐HMY (X=H, Cl, Br, I, Li; M=Be, Mg; Y=H, Li, Na) trimers are investigated to find ways to enhance the iodine–hydride interaction. The interaction energy in the NCI–HMH dimer is −2.87 and −5.87 kcal mol−1 for M=Be and Mg, respectively. When the free H atom in the NCI–HMH dimer is replaced with an al…
A C60-based magnetic tunnel transistor is presented. The device is based on the collection of spin-filtered hot-electrons at a metal/C60 interface, and it allows an accurate measurement of the energy level alignment at such interface. A 89% change in the collected current under the application of a magnetic field demo…
Studies of 2-(1H-pyrazol-5-yl)pyridine (PPP) and its derivatives 2-(4-methyl-1H-pyrazol-5-yl)pyridine (MPP) and 2-(3-bromo-1H-pyrazol-5-yl)pyridine (BPP) by stationary and time-resolved UV/Vis spectroscopic methods, and quantum chemical computations show that this class of compounds provides a rare example of molecule…
A new steroidal saponin, named pumilum A (1), and a new phenolic glycoside, threo-1-(4'-hydroxy-2'-methoxyphenyl)-2-(2",4"-dihydroxyphenyl)-1,3-propanediol-4'-O-β-D-glucopyranoside (7) were isolated from the methanolic extract of the bulbs of Lilium pumilum DC, along with five known steroidal saponins. Their chemical…
Hole extraction in organic photovoltaic cells (OPVs) can be modulated by a surface-enriched layer formed on top of the conducting polymer-based hole extraction layer (HEL). This tunes the surface work function of the HEL to better align with the ionization potential of the polymeric photoactive layer. Results show not…
Flexible organic bistable devices (OBDs) for the memory characteristics utilizing CdSe-InP core-shell nanoparticle/polystyrene nanocomposites were fabricated on indium-tin-oxide-coated polyethylene terephthalate substrates. Current-voltage measurements on Al/CdSe-InP nanoparticles embedded in polystyrene layer/indium-…
High-quality-factor one-dimensional photonic crystal nanobeam cavities embedding GaN/AlN quantum dots are fabricated by an epilayer transfer method. The GaN/AlN quantum dots are first grown on SiC before being transferred to a Si substrate using a hydrogen silsesquioxane bonding layer and highly selective back-etching…
Hochleistungssprengstoff: Tris(triazolo)benzol wurde synthetisiert und in seine Trinitro- und Trichlorderivate umgewandelt (siehe Schema; R=NO2, Cl). Die Bildungswärmen dieser stickstoffreichen Verbindungen wurden berechnet und mit experimentell bestimmten Dichten kombiniert, um die Detonationsdrücke und -geschwindigk…
The hole concentration p in Mg-doped GaN films grown by ammonia molecular beam epitaxy depends strongly on the growth temperature TGR. At TGR=760 °C, GaN:Mg films showed a hole concentration of p=1.2 × 1018 cm−3 for [Mg]=4.5×1019 cm−3, while at TGR=840 °C, p=4.4×1016 cm−3 for [Mg]=7×1019 cm−3. Post-growth annealing di…
Abstract Five isoreticular lanthanide (Ln) metal‐organic frameworks (MOFs) – Er(bdc)(HCOO) (1a), Dy(bdc)(HCOO) (1b), Tb(bpdc)(HCOO) (2a), Gd(bpdc)(HCOO) (2b) and Tb(bpydc)(HCOO) (3) (bdc = 1,4‐benzenedicarboxylate, bpdc = 4,4′‐biphenyldicarboxylate and bpydc = 2,2′‐bipyridine‐5,5′‐dicarboxylate) – were synthesized und…
Grafting of a gold complex to an organo-polyoxometalate delivers catalytically active bitopic hybrids. The gold end activates allenes, while the metal-oxide surface can capture protons (see scheme). The scope of the gold-catalyzed oxacyclization of allenols is expanded to highly sensitive tertiary benzylic alcohols.
An optical sensor based on the coupling between the plasmonic and photonic resonance modes in metallic photonic crystals is investigated. Large-area metallic photonic crystals consisting of periodically arranged gold nanostructures with dimensions down to sub-100 nm are fabricated using solution-processible gold nanop…