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。
The band structure of graphene exhibits van Hove singularities (VHSs) at dopings $x=\ifmmode\pm\else\textpm\fi{}1/8$ away from the Dirac point. Near the VHS, interactions effects, enhanced due to the large density of states, can give rise to various many-body phases. We study the competition between many-body instabil…
The structural and electronic properties of silicene nanosheets epitaxially grown on Ag(111) are systematically investigated by combining scanning tunneling microscopy and scanning tunneling spectroscopy. By carefully tuning the growth parameters, complex 2D silicon structures are obtained, which evidence the presence…
Abstract Multifunctional mesoporous silica nanoparticles are developed in order to deliver anticancer drugs to specific cancer cells in a targeted and controlled manner. The nanoparticle surface is functionalized with amino‐β‐cyclodextrin rings bridged by cleavable disulfide bonds, blocking drugs inside the mesopores…
Atomic clusters of metals are an emerging class of extremely interesting materials occupying the intermediate size regime between atoms and nanoparticles. Here we report the nonlinear optical (NLO) characteristics of ultrasmall, atomically precise clusters of gold, which are smaller than the critical size for electron…
Riesige gemischte Cluster entstehen aus einem mehrkernigen supramolekularen Silber(I)-tert-butylethinid-Baustein und phosphonatfunktionalisierten Oxovanadaten als Oberflächenkomponente. Verschiedene anionische Spezies können bei diesem Prozess als Template eingeschlossen werden. Das Bild zeigt ein Ag36-Clusteranion, i…
The surface properties of the OSW and NLS are measured with the dynamic contact-angle technique. The x-ray photoelectron spectroscopy (XPS) of the OSW reveals that the OSW possesses various reactive functional groups namely hydroxyl groups (OH). Hybrid filler from NLS and OSW were incorporated into carboxylated nitril…
In this study, thermoplastic polyurethanes (TPUs) were synthesized using the one-shot process in solution. To obtain the samples n-phenylaminopropyl polyhedric oligomeric silsesquioxane (POSS) was added as a chain modifier during the synthesis in four different amounts. The samples were characterized by infrared spect…
This work describes the covalent immobilization of an ironporphyrin, 5,10,15,20- tetrakis(pentafluorophenyl)porphyrin iron(III) chloride (FeTFPP), onto maghemite/silica magnetic nanospheres covered with aminofunctionalized silica. The resulting material (γ-Fe2O3/SiO2-NHFeP) was characterized by diffuse reflectance inf…
Peptide-based star polymers show great potential as the next-generation of functional polymers due to their structure-related properties. The peptide component augments the polymer’s properties by introducing biocompatible and biodegradable segments, and enhancing their functionalities and structural ordering, which m…
Ru being served: A pyrene-Ru/SWCNT nanohybrid was formed through noncovalent π-π stacking interactions (see figure). After oxidative treatment, the pyrene-Ru/SWCNT-functionalized Pt electrode achieved a highly reversible redox process and exhibited excellent electrogenerated chemiluminescence behavior.
Direct link: Two directly linked benzonorrole dimers were prepared and characterized, and both have short interplane distances less than 3.5 Å. While a strong π–π interaction was recognized in the oxidized form (left), only a negligible π–π interaction was observed in the reduced form (right) in spite of its shorter π…
Nanorods standing at attention! A self-assembly technique based on convective and capillary forces was used for the direct fabrication of standing arrays of gold nanorods on lithographically predefined areas (see picture). The hexagonal close-packed structure of gold nanorods creates an ideal substrate for surface-enh…
Giant mixed-metal clusters have been assembled with the multinuclear silver(I) tert-butylethynide supramolecular synthon and phosphonate-functionalized oxovanadate building blocks as surface components. Various anionic species can be used as their encapsulated templates. (Picture: Ag36 cluster anion encapsulating a ch…
Using atomistic electronic structure calculations and Boltzmann semi-classical transport we compute the thermoelectric power factor of ultra-thin-body p-type Si layers of thicknesses from W=3nm up to 10nm. We show that the power factor for channels in [110] transport orientation and strong (110) surface confinement la…
The reaction of [Ln(hfac)(3)]·2H(2)O and pyridine-N-oxide (PyNO) leads to isostructural dimers of the formula [Ln(hfac)(3)(PyNO)](2) (Ln=Eu, Gd, Tb, Dy). The Dy derivative shows a remarkable single-molecule magnet behavior with complex hysteresis at 1.4 K. The dynamics of the magnetization features are two relaxation…
Crumpled graphene oxide (GO)/graphene is a new type of carbon nanostructure that has drawn growing attention due to its three-dimensional open structure and excellent stability in an aqueous solution. Here we report a general and one-step approach to produce crumpled graphene (CG)-nanocrystal hybrids, which are produc…
Abstract Poly(propyleneimine) (PPI) dendrimers functionalized with C16 alkyl chains acted as efficient tertiary amine catalysts for an intramolecular Michael reaction. The substrate was accommodated in a reactive conformation within a sterically confined nanocavity consisting of regularly arranged tertiary amino group…
Abstract Photochromic solid-state trans–cis isomerization of the 4-aminoazobenzene moiety was observed for the first time in (trans-4-aminoazobenzene)(β-cyanoethyl)bis(dimethylglyoximato)cobalt(III) after β–α isomerization of the β-cyanoethyl group on exposure to UV light. The UV spectra revealed that β–α isomerizatio…
"ENGINEER", established in 1973 by The Institution of Engineers, is a Journal for dissemination of Engineering knowledge, published quarterly.If you are interested in contributing an Original Technical Paper based on research by the author(s) (intended for Section I) or an Original Article of Professional or Technical…
Determination of actual parameters of manufactured optical coatings (reverse engineering of optical coatings) provides feedback to the design-production chain and thus plays an important role in raising the quality of optical coatings production. In this paper, the reliability of reverse engineering results obtained u…