Materials Literature
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近年来,苯并[1,2-b：4,5-b＇]二噻吩（benzo[1,2-b：4,5-b＇]dithiophene,BDT）作为构筑给体-受体结构有机半导体材料的优良电子给体,受到越来越多的重视,已广泛应用于场效应晶体管和有机光伏电池等领域。BDT类有机共轭材料具有优良的能级结构,同时又具有较高的载流子迁移率,目前报道的基于BDT的有机共轭聚合物的最高光电转换效率达到9.2%（单节光伏器件的最高效率）,显示了其在有机太阳能电池领域巨大的应用前景。本文从BDT的结构修饰出发,系统地综述了基于BDT的有机光伏材料的最新研究进展,重点讨论BDT类光伏材料能级结构和聚集态形貌对光电性能的影响。
Woodward’s mobile and industrial engine control systems and components improve emissions and fuel economy for engines fueled by propane and natural gas.
Woodward designs and develops optimized combustion systems for aircraft and industrial turbines, and engines.
Protein based films used for food packaging despite having numerous benefits like biodegradability and renewability suffer from essential drawbacks of weak mechanical and water vapour barrier properties. In recent years efforts for improving functional properties of such films from various resources, through modifying…
采用表面活性剂辅助共沉淀法制备了Ni-Mg-Al固体碱催化剂并用于CH4-CO2重整反应，探讨了表面活性剂对Ni（111）， Ni（200）晶面的择优取向作用，在800°C下比较了不同表面活性剂制备的催化剂的催化性能，详细考察了CTAB制备的催化剂CB-LDO在不同反应温度下的催化活性和稳定性。采用红外光谱、X射线衍射、程序升温还原、X射线光电子能谱、高分辨透射电镜和程序升温氧化等表征手段分析了催化剂的活性、稳定性和失活原因。结果表明，四丙基氢氧化铵（TPAOH）促进Ni（200）的生长，而聚氧乙烯-聚氧丙烯-聚氧乙烯（P123）、聚乙烯吡咯烷酮（PVP）和十六烷基三甲基溴化铵（CTAB）抑制Ni（200）晶面的生长；Ni（200…
Mehr Infos uber die robusten, zuverlassigen Hochleistungs-Magnetspulen von Woodward fur die anspruchsvollsten Anwendungen.
We have systematically investigated the crystal structure and the magnetic properties of BiS2-based superconductor Ce1-xNdxO1-yFyBiS2 (x = 0 - 1.0, y = 0.3, 0.5 and 0.7) and Nd1-zSmzO1-yFyBiS2 (x = 0 - 0.8, y = 0.3, 0.5 and 0.7). In the REOBiS2 system, both crystal structure and physical properties are tunable by mixi…
Multichromophoric systems capable of operating as light-harvesting antennae have recently been attracting increasing attention. In their Full Paper on page 10661 ff., M. Gingras, G. Bergamini et al. describe the synthesis, characterization, and metal-ion coordination of a multichromophoric tetra(terpyridine) ligand th…
The simple cubic ReO₃-type framework has all of the key features required for negative thermal expansion (NTE) arising from the transverse thermal motion of bridging atoms and rotation of rigid polyhedra. \n Although ReO₃ itself only displays low NTE below ambient temperature, there is a potentially large family of is…
We report on the role of plasmonic resonances in determining the delicate balance between scattering and absorption of light in nanometric particle arrays applied to the front surface of solar cells. Strong parasitic absorption is shown to be dependent upon the excitation of localized surface plasmon resonances and pr…
Muscle tissues must grow and change to accommodate the needs of an animal at various stages in its life. For example, fruit flies begin life as larvae and their muscles must help them move their soft bodies. Later, when the flies mature into adults, the muscles must provide power for flight and support for the insects…
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Similar to how carbon networks can be sculpted into low-dimensional allotropes such as fullerenes, nanotubes, and graphene with fundamentally different properties, it is possible to create similar “allotropes” of Ge with unique optoelectronic properties as well. Here, we describe our recent success in the creation of…
It is shown that a wet process for thin Si and Ge films deposition based on the ballistic electron injection into solutions is available for SiGe. A nanocrystalline silicon (nc-Si) diode is composed of a thin Au (10 nm)/Ti (1 nm) film surface electrode, nc-Si layer (~1 µm), n+-Si substrate, and back contact. The elect…
A new blue-emitting phosphor, K2ScSi4O10F:Eu>2+ (KSSOF:Eu2+), was synthesized through a solid-state reaction. The structural and optical properties of KSSOF:Eu2+ phosphor, in addition to its thermal quenching and fabrication of white LEDs (WLEDs), were investigated for the first time. The phosphor showed broad blue em…
In this paper, we show that, in the presence of two strong ac magnetic fields, a weak acoustic wave interacts with a crystal of molecular magnets. We obtain the analytical expression for absorption and group velocity in the linear case and discuss the effect of two coupling fields intensity on absorption and group vel…
While most proteins unfold under high-pressure conditions, some high-pressure experiments suggest that an AK16 peptide forms more helical structures. In order to understand this abnormality, molecular dynamics simulations with the simulated tempering method for the isobaric–isothermal ensemble were performed in a wide…
Recently, higher steam inlet temperature and pressure has been required for fossil power plants in order to increase the power generation efficiency. Therefore, boron-bearing high-chromium (high-Cr) steels with higher long-term creep strength are applied to structure materials in these plants. Dissimilar (metal) weld…
This paper proposed a novel broadband filter using multi-layer sub-wavelength high-contrast grating (HCG) structure. This filter has wide bandwidth and good sideband suppression. We simulated and analyzed the effects of different numbers of layers and different grating indexes on filtering performance of the broadband…