Materials Literature
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Biologically and chemically modified nanoparticles are gaining much attention as a new tool in cancer detection and treatment. Herein, we demonstrate that an alizarin red S (ARS) dye coating on TiO2 nanoparticles enables visible light activation of the nanoparticles leading to degradation of neighboring biological str…
An extension of the X-ray extended-range technique is described for measuring X-ray mass attenuation coefficients by introducing absolute measurement of a number of foils - the multiple independent foil technique. Illustrating the technique with the results of measurements for gold in the 38-50 keV energy range, it is…
β-mercaptoethanol (BME) has been used as an “anti-blinking” reagent with quantum dots (QDs), but its exact effects on the luminescence behavior of different QD materials have not been quantified. In this study, the luminescence lifetime decays of aqueous solutions of CdTe QDs solubilized with mercaptopropionic acid (M…
A highly sensitive flow-injection chemiluminescence (FIA-CL) method based on the CdTe nanocrystals and potassium permanganate chemiluminescence system was developed for the determination of L-ascorbic acid. It was found that sodium hexametaphosphate (SP), as an enhancer, could increase the chemiluminescence (CL) emiss…
Results of the investigation of photoluminescence (PL) mechanisms for silicon dioxide films implanted with ions of silicon (100 keV; 7 × 10(16) cm(-2)) and carbon (50 keV; 7 × 10(15)-1.5 × 10(17) cm(-2)) are presented. The spectral, kinetic and thermal activation properties of the quantum dots (Si, C and SiC) formed b…
High purity aluminum films were deposited on sapphire substrates by thermal evaporation. Solid state annealing of these specimens resulted in the development of several types of previously unobserved microstructural features. Through thickness drum‐like cavities covered with a thin membrane of γ‐alumina were formed in…
We report the magneto-transport properties of cellulose films comprising interconnected networks of gold nanoparticles (Au NPs). Cellulose is a biopolymer that can be made electrically conducting by cellulose regeneration in Au NP dispersions. The mechanism of electronic conduction in the Au-cellulose films changes fr…
The first heterobimetallic Bi:Sn alkoxide complexes [Bi(2)SnO(OCH(CF(3))(2))(5)(O(t)Bu)(3)(THF)] (1) and [BiSnO(OCH(CF(3))(2))(3)(O(t)Bu)(2)](2) (2) are described. The complexes were obtained through mixing and heating equimolar quantities of the component alkoxides, Bi(OCH(CF(3))(2))(3) and Sn(O(t)Bu)(4), under solve…
Abstract Time-dependent magnetic behaviour at room temperature is investigated in highly oriented epitaxial hard magnetic thin films. Single-layer films with nominal composition PrCo 5 and PrCo 7 were studied, along with two SmCo 5 /Fe/SmCo 5 trilayer films, with Fe layer thicknesses of 11 and 16 nm. The films were pr…
Epitaxial growth of SrRuO 3 /CoFe 2 O 4 /La 2/3 Sr 1/3 MnO 3 trilayers on SrTiO 3 (001) substrates has been successfully achieved using pulsed laser deposition. This trilayer configuration, which consists of two conducting ferromagnetic oxides separated by a thin insulating ferrite film, is a promising candidate for a…
The local environment of nickel atoms in ${\text{YNiO}}_{3}$ across the pressure-induced insulator-to-metal (IM) transition was studied using x-ray absorption spectroscopy (XAS) supported by ab initio calculations. The monotonic contraction of the ${\text{NiO}}_{6}$ units under applied pressure observed up to 13 GPa s…
Abstract Polymeric micelles showing charge selective and pH‐reversible encapsulation are reported. It is found that for a guest mixture of organic cationic–anionic dyes, a unimolecular micelle (PEI@PS) with a polystyrene (PS) as shell and a hyperbranched polyethylenimine (PEI) as core can exclusively entrap the anioni…
Molecules with photoswitchable nonlinear optical (NLO) properties on the nanosecond time scale are attracting considerable attention as potential solid-state components of photonic devices, downsizeable at will, for ultrafast information encoding. In this context, we present here the study of an electron-rich Fe(II) 4…
Iso-luminol functionalized gold nanomaterials were synthesized in high yield by a simple seeding approach, using the chemiluminescent reagent iso-luminol as reductant in the presence of HAuCl(4), AgNO(3) and cetyltrimethylammonium bromide (CTAB). The morphology of as-prepared gold nanoparticles was characterized by tr…
The objectives and scopes of this research were confined into the formalization of strategies and technical procedures for recycling PEMs back to permeable wearing courses. The most relevant boundary conditions were the following: mitigating the drawback of clogging and its related consequences (decay of acoustic and…
The luminescence properties of the Yb/Er-doped phosphosilicate preforms used for the design of active optical fibers were investigated under a tunable laser excitation from ultraviolet to infrared domain. We demonstrated that codoping the glass matrix with Ce3+ions strongly influences the infrared emission associated…
In this work, the capability of gas phase synthesis for crystal shape engineering of silicon nanoparticles (SiNPs) in a hot wall reactor is demonstrated. Therefore, the necessary boundary conditions for the formation of monodisperse spherical SiNPs as well as octahedral-shaped particles from silane pyrolysis are syste…
2D inorganic nanosheets can be used as a dielectric analogue of graphene. A layer-by-layer engineering approach to inorganic nanosheets promises unique possibilities in the design of thin-film device architectures, such as capacitors, gate dielectrics, transistors, and artificial ferroelectrics. Graphene is only the t…
Abstract Dendron‐like poly(ε‐benzyloxycarbonyl‐ L ‐lysine)/linear poly(ethylene oxide) block copolymers (i.e., Dm‐PZLys‐ b ‐PEO, m = 0 and 3; Dm are the propargyl focal point poly(amido amine) dendrons having 2 m primary amine groups) were for the first time synthesized by combining ring‐opening polymerization (ROP) o…
Abstract The synthesis of 0 th ( n = 1) and 1 st ( n = 2) generation, monodisperse, star‐shaped oligoviologens, C[(BnV ++ –PhV ++ ) n CH 2 X] 3 , which consist of a phenyl or a 2,4,6‐trimethylphenyl core (C) with triple 1,3,5‐branches, in which each branch consists of a linear alternating series of diphenyl‐ (PhV ++ )…