Materials Literature
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We report for the first time the synthesis of colloidal Ln3+/Yb3+ co-doped KY3F10nanocrystals (Ln = Er or Eu) viathermal decomposition. The transmission electron microscopy (TEM) studies indicated that the average size of the nanocrystals was approximately 15 nm. The nanocrystals crystallized in the cubic Fmm space gr…
Upconverting phosphors (UCPs) are lanthanide-doped sub-micrometer-sized particles, which produce multiple narrow and well-separated anti-Stokes emission bands at visible wavelengths under infrared excitation (980 nm). The advantageous features of UCPs were utilized to construct a dual-parameter, homogeneous sandwich h…
Multistage carriers were recently introduced by our laboratory, with the concurrent objectives of co-localized delivery of multiple therapeutic agents, the "theranostic" integration of bioactive moieties with imaging contrast, and the selective, potentially personalized bypassing of the multiplicity of biological barr…
We have fabricated a charge transfer interaction driven supramolecular amphiphile, the self-assembly nanostructures of which can change between vesicles and irregular continuous aggregates reversibly in response to redox stimuli.
Open porous PMMA based foams have been synthesized from surfactant-free high internal phase emulsion templates.
We report a new set of rheological data on well controlled aqueous foams. We investigate and analyze how the linear viscoelastic regime, the foam yielding and the non-linear regimes above yielding actually depends on the interfacial properties, bubble size, liquid fraction and foam age. Results are compared to previou…
The synthesis of nanoparticles of controlled size, shape, size distribution and surface state is nowadays recognized to be of prime importance both from a fundamental point of view and for applications. Among all nanomaterials, nanoparticles of metal oxides are very attractive as their unique characteristics make them…
A novel near-infrared (NIR) quantum cutting (QC) Ca2BO3Cl:Ce3+,Tb3+,Yb3+ phosphor promising for luminescent solar concentrators (LSC) with Si solar cells was successfully developed. It can harvest UV photons and exhibits an intense NIR emission of Yb3+ around ∼1000 nm, perfectly matching the maximum spectral response…
Abstract: We present two types of metamaterial-based spectral band-pass filters for the terahertz (THz) frequency range. The metamaterials are specifically designed to operate for waves at normal incidence and to be in-dependent of the field polarization. The functional structures are embedded in films of benzocyclobu…
Currently-used mechanical and biological heart valve prostheses have several disadvantages. Mechanical prostheses, based on carbon, metallic and polymeric components, require permanent anticoagulation treatment, and their usage often leads to adverse reactions, e.g. thromboembolic complications and endocarditis. Xenog…
A new synthetic method has been developed to prepare fluorescent silica nanoparticles without employing isothiocyanated dye molecules and (3-aminopropyl)triethoxysilane (APS) for the thiourea linkage formation; the resulting fluorescent silica nanoparticles show excellent photochemical, thermal and pH stabilities and…
This manuscript demonstrates a room-temperature synthesis for Ag2S nanocrystals and their nanocompsites with Au and the Au could be deposited only at a single site on each Ag2S seed nanocrystal, where in contrast, Ag2S could grow homogeneously on Au seed nanocrystals, resulting in core-shell Au@Ag2S nanoparticles, whi…
Manganese oxide was synthesized by direct reduction of ions on microfibrous carbon paper (CP) and a multiscaled substrate, which consists of microfibrous CP coated with carbon nanotubes. This process is much simpler than that used for the formation of composite electrode. Scanning electron microscopy and energy disper…
We prepared a binaphthyl derivative possessing two 2,3-difluoro-1,4-diphenylbenzene units, and then investigated the phase transition behaviour. On cooling, the compound was found to exhibit a phase sequence of iso liq–blue phase–smectic phase. The temperature of the blue phase with a cubic structure was about 30 K. A…
Ultrasound is progressively being recognized as a new powerful tool for the surprising yet effective gelation of organic liquids and water by supramolecular gelators, the diversity of which is discussed in this Highlight article, as well as the key concepts of sonocrystallization and mismatched intra-/intermolecular i…
Two protic alkylimidazolium polyoxometalates, together with two corresponding aprotic N-methyl-alkylimidazolium polyoxometalates were synthesized and characterized by the methods of NMR, IR and TGAetc. Then, these salts were employed as catalysts for the epoxidation of cyclooctene in different media. The novel protic…
The objective was to characterize the biodistribution of nanoscale ceria from blood and its effects on oxidative stress endpoints. A commercial 5% crystalline ceria dispersion in water (average particle size ~31±4 nm) was infused intravenously into rats (0, 50, 250 and 750 mg/kg), which were terminated 1 or 20 h later…
Electroactive conjugated polymer brushes of poly(thiophene) and poly(phenylene) have been prepared via a surface-initiated Kumada-type polycondensation reaction, yielding films with a thickness up to 42 nm.
Single-walled nanotubes (SWNTs) suspended in chlorobenzene (PhCl) and ethyl phenylacetate (EPA) were incorporated into microcapsules using an in situemulsification polymerization of urea-formaldehyde; the capsules release the SWNTs upon mechanical rupture.
The electrochemical oxidation of graphitic carbon results in the performance decay of electrochemical systems such as aqueous, acidic fuel cells, redox-flow batteries, and supercapacitors. An electrochemical mechanism and numerical model is proposed to explain long-standing questions. The model predicts carbon weight…