Materials Literature
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Marshmallow-artige Gele, die in einem einfachen Prozess aus Organoalkoxysilanen hergestellt wurden, zeigen exzellente Eigenschaften in der Öl-Wasser-Trennung. Die Gele sind superhydrophob und können Wasser aus organischen Phasen absorbieren; man kann sie ausdrücken wie einen Schwamm und anschließend wiederverwenden. D…
Abstract Three bismuth complexes based on N ‐methyl‐4,4′‐bipyridinium (hMV + ), (hMV)[Bi(hMV)Cl 5 ] ( 1 ), and N ‐methyl‐ N′ ‐oxide‐4,4′‐bipyridinium (MVO + ), [Bi(MVO)X 4 (dmso)] · dmso [X = Cl ( 2 ), Br ( 3 )], are reported. All three compounds show luminescence in the solid state with maxima at 545 nm (yellow for 1…
Nanoemulsions with very high stability can be created by ultrasonication using a rich variety of surfactants, oils, and solution conditions. Multicompartments within a nanoemulsion droplet can also be created via a carefully chosen surfactant system. We will show in this paper that silica templating of a nanoemulsion…
Abstract In den letzten Jahren haben halbleitende Polymernanopartikel beträchtliches Interesse geweckt, und zwar aufgrund ihrer herausragenden Eigenschaften als Fluoreszenzsonden. Diese Nanopartikel, die vorwiegend aus π‐konjugierten Polymeren bestehen und Polymerpunkte (P‐Punkte) genannt werden, wenn sie eine kleine…
Abstract A series of CuS nanostructures were synthesized by a simple wet chemical method on a large scale in the presence of cetyltrimethylammonium bromide at low temperature. Three typical samples were selected to study the relationship between the morphologies and resulting physical properties. The optical propertie…
The phase behavior for a series of poly(1,4‐isoprene‐b‐DL‐lactide) diblock copolymers characterized by a relatively large Flory–Huggins segment–segment interaction parameter (χ) and low degrees of polymerization (N) over a range of compositions was reported. Ordered‐state morphologies were deduced from small‐angle x‐r…
PREFACE INTRODUCTION SYNTHESIS APPROACH OF MESOPOROUS MOLECULAR SIEVES Synthesis Hydrothermal Synthesis Removal of Template Basic Synthesis Acidic Synthesis Nonaqueous Syntheses Postsynthesis Treatment Stability of Mesoporous Materials Pore-Size Control MECHANISMS FOR FORMATION OF MESOPOROUS MATERIALS Introduction Syn…
We investigated low energy nuclear spin excitations in the layered compound CoCl$_2$ by high resolution back-scattering neutron spectroscopy. We detected inelastic peaks at $E = 1.34 \pm 0.03$ $μ$eV on both energy loss and energy sides of the central elastic peak at $T = 2$ K. The energy of the inelastic peaks decreas…
We study mode-I fracture in lattices with noisy bonds. In contrast to previous attempts, by using a small parameter that perturbs the force-law between the atoms in perfect lattices and using a 3-body force law, simulations reproduce the qualitative behavior of the beyond steady-state cracks in the high velocity regim…
Using Landau-Ginzburg-Devonshire theory, we have addressed the complex interplay between structural antiferrodistortive order parameter (oxygen octahedron rotations), polarization and magnetization in EuxSr1−xTiO3 nanosystems. We have calculated the phase diagrams of EuxSr1−xTiO3 bulk, nanotubes and nanowires, which i…
In d-dimensional lattices of coupled quantum harmonic oscillators, we analyze the heat current caused by two thermal baths of different temperatures, which are coupled to opposite ends of the lattice, with a focus on the validity of Fourier's law of heat conduction. We provide analytical solutions of the heat current…
The principal methods for the synthesis of highly luminescent core-shell colloidal quantum dots (QDs) of the most widely used CdSe, CdS, ZnSe, and other A(II) B(VI) nanocrystals are reviewed. One-pot versus multistage core synthesis approaches are discussed. The noninjection one-pot method ensures slow, controllable g…
Since the first reported isolation of graphene by peeling graphite with cellophane tape in 2004, there has been a paradigm shift in research. In just nine years, graphene has had a major impact on fields ranging from physics and chemistry to materials science and engineering leading to a host of interdisciplinary adva…
Carbon nanotubes (CNTs) are receiving considerable attention in site-specific drug and nucleic acid delivery, photodynamic therapy, and photoacoustic molecular imaging. Despite these advances, nanotubes may activate the complement system (an integral part of innate immunity), which can induce clinically significant an…
Biodegradable chitosan of different sizes were used to encapsulate antitumor drug doxorubicin (Dox) and its N-(trifluoroacetyl) doxorubicin (FDox) analogue. The complexation of Dox and FDox with chitosan 15, 100, and 200 KD was investigated in aqueous solution, using FTIR, fluorescence spectroscopic methods, and molec…
Direct-write assembly allows rapid fabrication of complex three-dimensional (3D) architectures, such as scaffolds simulating anatomical shapes, avoiding the need for expensive lithographic masks. However, proper selection of polymeric ink composition and tailor-made viscoelastic properties are critically important for…
The speed of ultra-fast optical switches is generally limited by the intrinsic electronic response time of the material. Here we show that the phase content of selected electromagnetic pulses can be used to measure the timescales characteristic for the different regimes of matter-light interactions. By means of combin…
Two water-insoluble isostructural inorganic–organic hybrid materials, [M(pytpy) 2 Mo 4 O 13 ] ∞ (M = Cu 1, Ni 2, pytpy = 4′-(4-pyridyl)-4,2′:6′,4″-terpyridine), have been prepared by in situ formation of the Mo 4 O 13 2– clusters from the decomposition of H 3 PMo 12 under hydrothermal conditions. Both of the two compl…
Microbullet particles, cylinders with one blunt end and one hemispherical end, offer a novel platform to study the effects of anisotropy and curvature on colloidal assembly in complex fluids. Here, we disperse microbullets in 4-cyano-4′-pentylbiphenyl nematic liquid crystal (NLC) cells and form oriented elastic dipole…
We predict the stabilities of α-graphynes and their boron nitride analogues (α-BNyne), which are considered as competitors of graphene and two-dimensional hexagonal BN. On the basis of the first-principles plane wave method, we investigated the stability and structural transformations of these materials at different s…