Materials Literature
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Energetic heavy ions passing through polymer foils cause modifications of properties, first of all structural changes. In order to evaluate ion beam modification of fluoropolymers, a comparison of polyvinylidene fluoride (PVDF), ethylene-tetrafluoroethylene (ETFE), tetrafluoroethylene-per-fluoromethoxyethylene (PFA),…
We demonstrate control over the morphology and shape of microparticles. Two different types of microparticles (core–shell or acorn shaped) were produced by the varying the blend ratio of two immiscible biodegradable polymers in a tube-type microfluidic device. Subsequent use of selective solvent extraction resulted in…
Amphiphilic pentablock copolymers of poly (trifluoroethyl methacrylate)-b-poly (methyl methacrylate)-b-poly (ethylene glycol)-b-poly (methyl methacrylate)-b-poly (trifluoroethyl methacrylate) (PTFEMA-b-PMMA-b-PEG-b-PMMA-b-PTFEMA) with three different block ratios as well as molecular weights were used to fabricate hon…
The 9-mesityl-10-methylacidinium cation (Acr + -Mes) was incorporated into Na + -exchanged mesoporous aluminosilicate (AlMCM-41) by cation exchange. Incorporation of Acr + -Mes into AlMCM-41 has made the lifetime of the electron-transfer (ET) state (Acr • -Mes •+ ) produced upon photoexcitation of Acr + -Mes extremely…
Macromolecular crowding can influence polymer shapes, which is important for understanding the thermodynamic stability of polymer solutions and the structure and function of biopolymers (proteins, RNA, DNA) under confinement. We explore the influence of nanoparticle crowding on polymer shapes via Monte Carlo simulatio…
Zero-index-metamaterials (ZIM) have drawn much attention due to their intriguing properties and novel applications. Particularly, in a parallel plated ZIM waveguide system with defects, total reflection or transmission of wave can be achieved by adjusting the properties of defects. This effect has been explored extens…
We quantify the rate and efficiency of picosecond electron transfer (ET) from PbS nanocrystals, grown by successive ionic layer adsorption and reaction (SILAR), into a mesoporous SnO2 support. Successive SILAR deposition steps allow for stoichiometry- and size-variation of the QDs, characterized using transmission ele…
Stimuli-responsive self-assembly is playing an increasingly important role in emerging applications, ranging from smart materials to biosensors. However, obtaining essential information for further development, such as molecular arrangement and interaction, is still experimentally challenging. A molecular-level unders…
A flux-free solution to the growth of large and composition homogeneous superconducting FeSe crystal is reported for the first time, which is based on the traveling-solvent floating-zone technique. The size of the crystal samples prepared by this approach is up to 15 × 6 × 2 mm 3 , being far bigger than previously rep…
A versatile, low-temperature, and low-cost chemical conversion synthesis has been developed to prepare copper sulfide (Cu2S) nanotubes. The successful chemical conversion from ZnS nanotubes to Cu2S ones profits by the large difference in solubility between ZnS and Cu2S. The morphology, structure, and composition of th…
The chemical transformations taking place during the formation of catalytic Pt–Ga alloyed nanoparticles supported on calcined Ga-modified hydrotalcite Mg(Ga)(Al)O x are investigated. The starting point is a Pt(acac) 2 precursor impregnated onto a Mg(Ga)(Al)O x support. An oxidative treatment first yields Pt nanopartic…
The Schiff-base (2-aminoethyl)hydroxybenzoic acid (H(2)L) as a proligand was prepared in situ from 3-formylsalicylic acid and ethanolamine (ETA). The mononuclear {[Y(HL)(4)][ETAH]·H(2)O} (1) and {[Dy(HL)(4)] [ETAH]·3MeOH·H(2)O} (2) and tetranuclear {[Y(4)(HL)(2)(L)(4)(μ(3)-OH)(2)]·4MeOH·4H(2)O} (3), {[Dy4(HL)(2)(L)(4)…
We present neutron diffraction analysis of ${\mathrm{BaFe}}_{2}{({\mathrm{As}}_{1\ensuremath{-}x}{\mathrm{P}}_{x})}_{2}$ over a wide temperature (10 to 300 K) and compositional $(0.11\ensuremath{\le}x\ensuremath{\le}0.79)$ range, including the normal state, the magnetically ordered state, and the superconducting state…
Investigation of supramolecular kinetics is essential for elucidating self-assembly mechanisms. Recently, we reported on a noncovalent system involving a bolaamphiphilic perylene diimide dimer that is kinetically trapped in water but can rearrange into a different, more ordered assembly in water/THF mixtures ( Angew.…
Irradiation with 2.5 MeV electrons at doses up to $5.2\ifmmode\times\else\texttimes\fi{}{10}^{19} \mathrm{electrons}/\mathrm{cm}{}^{2}$ was used to introduce pointlike defects in single crystals of ${\mathrm{Ba}}_{1\ensuremath{-}x}{\mathrm{K}}_{x}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ with $x=0.19 ({T}_{c}=14\phantom{\ru…
In this study, we present a simple synthetic route for the preparation of narrowly distributed silver nanoparticles by using a phenolic hydroxyl modified chitosan as both reducing and capping agent. The effects of factors such as temperature and the concentration of both chitosan derivative and AgNO3 were systematical…
In this study, a three-dimensional CuO nanowire (NW) network decorated with N-doped graphene (NG/CuO) was fabricated by a method of thermal oxidation combined with hydrothermal and ion implantation. The morphological investigation of products was analyzed by field emission scanning electron microscopy (FESEM), which c…
A self-healing, high performance, carbon fibre reinforced polymer (CFRP) composite is demonstrated by embedding a Lewis-acid catalytic curing agent within a laminate, manufactured using out of autoclave (OOA) composite manufacturing methods. Two configurations of healing agent delivery, pre-mixed and autonomous mixing…
The complex magnetic and structural properties of Co-doped Ni-Mn-Ga Heusler alloys have been investigated by using a combination of first-principles calculations and classical Monte Carlo simulations. We have restricted the investigations to systems with 0, 5 and 9 at% Co. Ab initio calculations show the presence of t…
Nitric oxide (NO)-releasing derivatives of chitin and chitosan were prepared through incorporation of the symmetrical dithiols 1,2-ethanedithiol, 1,3-propanedithiol, and 1,6-hexanedithiol, followed by S-nitrosation with tert-butyl nitrite. The NO loading of the materials and their real-time NO release profiles under p…