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。
A unifying theoretical description of the magnetoelectric effects found in ${\text{TbMnO}}_{3}$ is proposed. The phase diagrams at zero and applied magnetic fields are worked out. They reveal that the ``giant'' dielectric effects observed in the spiral phase of ${\text{TbMnO}}_{3}$ result from an effective bilinear co…
Founded in 1683 in Leiden, the Netherlands, Brill is a leading international academic publisher in the Humanities, Social Sciences, International Law, and Biology. With offices in the Netherlands, Germany, Austria, the USA and Asia, Brill today publishes more than 360 journals and 2,000 new books and reference works e…
Abstract Poly( N ‐(4‐(2,2′:6,2″‐terpyridyl)phenyl)imino‐2,7‐fluorenylene P1‐2 was prepared upon palladium‐catalyzed polycondensation of 2,7‐dibromo‐9,9‐di‐ n ‐hexylfluorene 1 and 4′‐(4‐aminophenyl)‐2,2′:6,2″‐terpyridine 2 with 80% yield. MALDI–TOF spectroscopy indicated a maximum degree of polymerization of 14, the mo…
Abstract Bindung an Bakterien : Diskotische Moleküle aggregieren zu columnaren supramolekularen Polymeren, die über Mannoseeinheiten, die an ihrer Peripherie angebracht sind (orange; siehe Bild), eine starke polyvalente Bindung an Bakterien zeigen. Die reversible Bildung der supramolekularen Polymere ermöglicht ein ei…
Our recent investigations on the valence electronic structure of the icosahedral ${\text{Al}}_{70}{\text{Pd}}_{21}{\text{Mn}}_{9}$ quasicrystals by means of scanning tunneling microscopy and spectroscopy at low temperatures (5 K) have revealed signatures of a spiky local density of states near the Fermi energy. The lo…
The anelastic spectrum of ammonia borane (NH 3 BH 3 ) was measured in the temperature range between 1.3 and 300 K. The structural phase transition near 220 K is accompanied by a substantial variation of the elastic modulus (25−30%) and a spike of the elastic energy dissipation. The order−disorder phase transformation…
We propose a system that can store molecular hydrogen in densities up to $\ensuremath{\sim}100\text{ }\text{g}/\text{L}$. Our ab initio calculations predict the existence of an oxidized calcium dihydrogen complex, which holds up to eight ${\text{H}}_{2}$, i.e., $\text{Ca}(\text{ion}){({\text{H}}_{2})}_{8}$. The dihydr…
The water-soluble luminescent CdSe quantum dots were prepared by ligand exchange with triethanolamine (TEA). Oxygen can reversibly enhance the fluorescence of the synthesized quantum dots (TEA-CdSe-QDs) in aqueous solution. Nitric oxide radical (NO) can react easily with dissolved oxygen in water and was found to have…
This paper reports a novel helix-like ZnO nanostructure with several tens of nanometres in thickness synthesized on a gold-coated Si substrate by thermal evaporation of zinc sulfide powder at 1020°C. Transmission electron microscope characterization shows that as-synthesized ZnO nanohelices extend along [01 1] directi…
Ni/Al 2 O 3 catalysts were prepared by the impregnation method (IM), sol−gel method (SG), and modified sol−gel method (MSG). The effects of the preparation methods on the catalytic performances in the partial oxidation of methane (POM) to syngas were investigated. The catalysts were characterized by N 2 -adsopriton, X…
Nanotoxicology and nano-risk have been attracting increasing attention of toxicologists and regulatory scientists as the production of nanomaterials increases worldwide (Oberdorster et al. in Environ Health Perspect 113:823-839, 2005). In general, nanotoxicology is associated with manufactured nanomaterials. In atmosp…
Bimetallic nanoparticles (NPs) have wide applications in electronics, photonics, and catalysis. However, it is particularly challenging to synthesize size-controllable alloy nanoparticles (e.g., NiAu) with bulk immiscible metals as the components. Here we report the synthesis of isolable NiAu alloy nanoparticles with…
Although nanoparticle/protein binding and the cytotoxicity of nanoparticles have been separately reported, there has been no study linking the nature of nanoparticle/protein clusters to cell uptake and the dynamic cellular responses. We report here that water-soluble iron oxide-based magnetic nanoparticles (MNPs) with…
Abstract Schleuser und ihre Tricks: Polyionische komplexe (PIC) Micellen, die Citaconamid oder cis ‐Aconitamid enthalten, wurden entwickelt, um Proteine ins Zellplasma zu transportieren. Die erhöhte Ladungsdichte des transportierten Proteins stabilisierte die PIC‐Micellen, ohne dass eine Vernetzung nötig war; eine Lad…
We have probed the nature of magnetism at the surface of (001)-, (110)-, and (111)-oriented ${\text{La}}_{0.7}{\text{Sr}}_{0.3}{\text{MnO}}_{3}$ thin films. The spin polarization of ${\text{La}}_{0.7}{\text{Sr}}_{0.3}{\text{MnO}}_{3}$ thin films is not intrinsically suppressed at all surfaces and interfaces but is hig…
Abstract Richtig schnell : Palladiumnanopartikel (PdNPs) wurden einfach durch Eintauchen von {[Zn 3 (ntb) 2 (EtOH) 2 ]⋅4 EtOH} n ( 1 ) in eine MeCN‐Lösung von Pd(NO 3 ) 2 bei Raumtemperatur ohne Zugabe eines Reduktionsmittels hergestellt. Mit 3 Gew.‐% PdNPs@[ 1 ] 0.54+ (NO 3 − ) 0.54 ist die H 2 ‐Aufnahme gegenüber de…
Using an environmental transmission electron microscope, we followed and characterized the in situ atomic-level redox processes in individual ceria nanoparticles. This is a critical step to understand the redox functionality of catalytically active ceria-based oxide supports in many applications of catalysis. The dyna…
Atomistic calculations based on the nudged elastic band method for a Lomer dislocation in aluminum evidence a dependence of the Peierls potential on the applied shear stress in such a way that the Peierls stress predicted from the zero-stress potential is half its true value for the case considered here. Stress-depend…
Eu 2+ ‐doped M 2 Si 5 N 8 (M=Ca, Sr, Ba) orange–red phosphors were successfully prepared by a simple, direct, and efficient solid‐state reaction using air‐stable MSi 2 , Eu 2 O 3 , and α‐Si 3 N 4 as the starting materials under N 2 –H 2 (5%) atmosphere. The influence of the type of the alkaline‐earth ion on the phase…
Poly(3,4-ethylenedioxythiophene) (PEDOT) is widely used in organic electronics and biomaterial coatings because of its outstanding electrical properties and chemical stability. In this research, X-ray photoelectron spectroscopy (XPS) was used to investigate incorporation of different counterions during electrochemical…