Materials Literature
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Abstract The aim of the work reported was to investigate the effect of bases and neutralization steps on hydrogel microstructures. A series of porous hydrogels with various pore sizes were prepared by neutralizing a conventional hydrogel after gel formation. Scanning electron microscopy was used to characterize the mi…
We extract the anisotropy of the solid-liquid interfacial energy of small crystals using phase field crystal simulations. The results indicate a strong dependence of the interfacial energy on the parameters in the phase field crystal model determining the position in the solid-liquid coexistence region in the phase di…
The symmetry of the cholesteric uniform lying helix (ULH) structure, where the helix axis is aligned in a single direction parallel to the device substrates, is not compatible with a uniform surface alignment and an unwinding of the helical structure is expected at the interface. Fluorescence confocal polarizing micro…
We report quantification of the free-carrier absorption (FCA) cross section in silicon nanocrystals embedded in a thin SiO(2) film at 1540 nm using a collinear pump-probe method. To this end, we measured the pump-intensity dependence of both the light transmission through the film and the photoexcited carrier density…
Mn-substituted 1D [Zn 1− x Mn x Se](DETA) 0.5 (DETA = diethylenetriamine, x = 0−0.3) inorganic−organic hybrid nanobelts have been synthesized by a solvothermal reaction in a mixed solvent media. Strong Mn 2+ internal transition ( 4 T 1 → 6 A 1 ) emission peaks at 585 nm (2.12 eV) are detected at room temperature photo…
We studied the competition between heterogeneous and homogeneous nucleation of an aqueous suspension of charged colloidal spheres close to the container walls. Samples of equilibrium crystalline structure were shear-melted and the metastable melt left to solidify after the cessation of shear. The crystallization kinet…
A high-quality factor magnetoelectric (ME) laminated composite employing a type of ferromagnetic constant-elasticity alloy (FCEA) and piezoelectric Pb(Zr,Ti)O$_{3}$material is developed. The laminate is designed to operate as a half-wavelength$(\lambda/2)$, longitudinal resonator. The FCEA features high effective qual…
Nanooctahedra of MoS 2 are considered to be the true inorganic fullerenes, exhibiting different properties from the bulk and also other closed-cage morphologies of the same material. These structures are produced in high energy systems where the synthesis is performed far from equilibrium conditions, and the reaction…
The dynamics of a phase change have been studied using the electron beam in a transmission electron microscope to transform MgH2 into Mg. The study involved selected-area diffraction and electron-energy-loss spectroscopy (EELS). The orientation relation ( and ), obtained from the electron diffraction study, has been u…
Abstract BACKGROUND: This work focuses on combining electrospun biodegradable poly‐DL‐lactide (PDLLA) fibres and 45S5 Bioglass ® for tissue engineering applications. RESULTS: A variety of fibrous structures were produced upon application of an electric field to a flowing solution of PDLLA (5 wt/v%) in di‐methyl carbon…
Abstract Oxidation reactions of the reduced decavanadate [V IV 2 V V 8 O 26 ] 4– ( 1 ) with halide guest anions were investigated for the synthesis of V V host molecules. The reaction with Cl – afforded a new dodecavanadate, [HV V 12 O 32 (Cl)] 4– ( 3 ), which incorporated the guest chloride anion. The polyoxovanadate…
We derive a generalized model for isotropic as well as anisotropic crystal lattice systems of arbitrary Poisson ratio within the framework of the continuum phase-field crystal (PFC) approach (Elder and Grant 2004 Phys. Rev. E 70 051606). To this end we extend the simplest PFC model defined by a free energy functional,…
We study the magnetocaloric effect (MCE) in parallel one-dimensional chains of dipole-dipole interacting magnetic nanoparticles with collinear magnetic anisotropy axes. By means of a Monte Carlo method we simulate the magnetic field dependence of the MCE for a field applied perpendicular to the anisotropy axes, findin…
Nucleation during solidification is heterogeneous in nature in an overwhelmingly large fraction of all solidification events. Yet, most often the identity of the heterogeneous nucleants that initiate nucleation remains a matter of speculation. In fact, a series of dedicated experiments needs to be designed in order to…
We describe a modification of the tandem affinity purification method for purification and analysis of multiprotein complexes, termed here DEF-TAP (for differential elution fractionation after tandem affinity purification). Its essential new feature is the use for last purification step of 6xHis-Ni(++) interaction, wh…
We experimentally observe magnetic resonance in the visible frequency region from self-assembled silver nanocluster metamaterials. Extensive numerical modeling studies were conducted to find the optimal nanocluster dimensions. Self-assembly of silver nanoparticles coated with nanoscale silica coating was then performe…
Microphase separation of a polystyrene-block-polyisoprene-block-polystyrene triblock copolymer thin film under confined conditions (i.e., graphoepitaxy) results in ordered periodic arrays of polystyrene cylinders aligned parallel to the channel side-wall and base in a polyisoprene matrix. Polymer orientation and trans…
Abstract Dendritic polymers' highly specific and three‐dimensional architectures set them apart from linear and slightly branched polymers. Their unique properties also allow them to form hierarchical organizations, which can be classified as planar or non‐planar. The preparation of a planar hierarchy consisting of de…
A pyridine-N-oxide functionalized DOTA analogue has been conjugated to a calix[4]arene and the corresponding Gd-complex was characterized with respect to its suitability as MRI contrast agent. The compound forms spherical micelles in water with a cmc of 35 microM and a radius of 8.2 nm. The relaxivity of these aggrega…
Structural knowledge of the high-temperature phases of saturated carboxylic acids (C(n)H(2n-1)O(2)H) from C(6)H(11)O(2)H to C(23)H(45)O(2)H is now complete. Crystal structures of the high-temperature phases of even acids from decanoic (C(10)H(19)O(2)H) to eicosanoic (C(20)H(39)O(2)H) are reported. The crystal structur…