Materials Literature
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Nanotechnology provides researchers with new tools for cancer treatment. Biodegradable polymeric nanoparticles, as an advanced drug delivery system, have promising applications in cancer treatment. Poly(- caprolactone)/poly(ethylene glycol) (PCL/PEG) copolymers are biodegradable and amphiphilic, and show potential app…
Measurements of thermal conductivity Λ by time-domain thermoreflectance in the temperature range 100<T<300 K are used to characterize the crystalline quality of epitaxial layers of a prototypical oxide, SrTiO3. Twenty samples from five institutions using two growth techniques, molecular beam epitaxy and…
A series of hierarchically mesostructured silica nanoparticles (MSNs) less than 100 nm in size were fabricated by means of a one-step synthesis using dodecanethiol (C(12)-SH) and cetyltrimethylammonium bromide (CTAB) as the dual template, and trimethylbenzene (TMB) as the swelling agent. Silica nanoparticles with vari…
Interaction between liquid-crystalline elastic deformation and microphase separation in liquid-crystalline block copolymers enables them to supramolecularly assemble into ordered nanostructures with high regularity. With the help of liquid-crystalline alignment, parallel and perpendicular patterning of nanostructures…
Circle the wagons: Well-defined cyclic poly(4-vinylbenzylcarbazole) (cyclic PVBCZ) polymers with differing molecular weights were prepared efficiently by successive atom-transfer radical polymerization (ATRP) and a click reaction (see picture; Σ=azide, Δ=alkynyl groups). The cyclic PVBCZ displayed a higher glass trans…
Super combo: Superhydrophobic and porous solid bases are synthesized by co-polymerization of divinylbenzene (DVB) and 1-vinylimidazolate (VI). The materials show higher activities towards the transesterification of tripalmitin with methanol than conventional bases and VI mono-/polymer. Their performance is attributed…
Guter Energiespeicher und -lieferant: Eine einfache, kostengünstige und möglicherweise skalierbare Technik, mit der Elektroden aus NiO/Ni-Nanokompositen (siehe Bild) für elektrochemische Superkondensatoren ohne Trägermaterialien und Additive hergestellt werden können, wird vorgestellt. Maximale Leistungen für die Spei…
An energy-efficiency technique for electrically modulating magnetoresistance was demonstrated in multiferroic anisotropic magnetoresistance (AMR) and giant magnetoresistance (GMR) heterostructures. A giant electric field (E-field) induced magnetic anisotropy caused by a strong magnetoelectric coupling was utilized to…
We explore the topological behavior of the binary Zintl phase of the alkaline earth metals based compounds Sr$_2$Pb and Sr$_2$Sn using both standard and hybrid density functional theory. It is found that Sr$_2$Pb lies on the verge of a topological instability which can be suitably tuned through the application of a sm…
One of severe limits of graphene nanoribbons (GNRs) in future applications is that zigzag GNRs (ZGNRs) are gapless, so cannot be used in field effect transistors (FETs). In this paper, using tight-binding approach and first principles method, we derived and proved a general edge (boundary) condition for the opening of…
We found that the current-voltage characteristics of graphene transistors exhibit an intriguing feature—an abrupt change in the current near zero gate bias at temperatures above 500 K. The strength of this effect, which we refer to as the memory step by analogy with the memory dips—known phenomenon in electron glasses…
Using lattice matched ZnO substrates, wurtzite single crystalline Mg0.49Zn0.51O films were obtained by reactive magnetron cosputtering method, and the heterostructures of MgZnO/ZnO were fabricated into metal-semiconductor-metal solar-blind photodetectors (SBPDs). Calculated and experimental results demonstrate that th…
We report the analysis of measurements of the complex magnetic permeability ($μ_r$) and dielectric permittivity ($ε_r$) spectra of a rubber radar absorbing material (RAM) with various MnZn ferrite volume fractions. The transmission/reflection measurements were carried out in a vector network analyzer. Optimum conditio…
Drug carriers tailored to fit the physicochemical properties of anticancer agents and the therapeutic peculiarities of tumor management are envisioned for improving the effectiveness/toxicity ratio of the current treatments. Polymeric micelles are attracting much attention owing to their unique beneficial features: i)…
Transparent graphene conducting films are successfully incorporated in thin-film CdTe solar cells as the front electrode. A four-layer graphene film, deposited by an ambient pressure chemical vapor deposition (CVD) method, possesses a carrier mobility of 550 cm2 V−1 s−1 and an optical transparency of 90.5% from 350–22…
Abstract The Fe 3 O 4 (111)/graphene/Ni(111) trilayer is proposed to be used as an ideal spin‐filtering sandwich where the half‐metallic properties of magnetite are used. Thin magnetite layers on graphene/Ni(111) were prepared via successive oxidation of a thin iron layer predeposited on graphene/Ni(111) and the forme…
A nanoporous metalloporphyrin framework exhibits high activity in the activation of molecular oxygen and excellent catalytic activity in the aerobic epoxidation of olefins, with high conversion, outstanding selectivity, and broad substrate applicability. The porous framework is reusable and allows large-scale transfor…
Abstract Mit Upconversion (UC, Aufwärtskonversion) werden nichtlineare optische Prozesse beschrieben, bei denen die aufeinander folgende Absorption von zwei oder mehr Photonen mit vergleichsweise großer Wellenlänge zur Emission von Strahlung mit kürzerer Wellenlänge (Emission vom anti‐Stokes‐Typ) führt. Im Unterschied…
The main objective in the development of nanomedicine is to obtain delivery platforms for targeted delivery of drugs or imaging agents for improved therapeutic efficacy, reduced side effects and increased diagnostic sensitivity. A (nano)material class that has been recognized for its controllable properties on many le…
Impressive energy storage and delivery: A simple, cost-effective, and potentially scalable technique is described for fabricating support- and additive-free NiO/Ni nanocomposite electrodes (see picture) for electrochemical supercapacitors. Maximum performances of energy storage and delivery were simultaneously achieve…