Materials Literature
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The effects of ZnO modification on the dielectric, ferroelectric, and electrostrictive properties of 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 (PMNT) ceramics are systematically studied in this work. The PMNT/xZnO (with x = 0, 0.4, 2.0, 4.0, and 11.0 mol. %) ceramics of complex perovskite structure were prepared by solid state re…
The analysis of hybrid multicomponent bioorganic and bioinorganic composite materials related to energy technologies by using X-ray photoelectron spectroscopy is discussed. The approaches and considerations of overcoming the difficulties of analyzing hybrid multicomponent materials are demonstrated for different types…
Graphene is promising as a host material for electron spin qubits because of its predicted potential for long coherence times. In armchair graphene nanoribbons (aGNRs) a small band gap is opened, allowing for electrically gated quantum dots, and furthermore the valley degeneracy is lifted. The spin lifetime ${T}_{1}$…
Spherical polymer brushes have a structure intermediate between star polymers and polymer brushes on flat substrates, and are important building blocks of polymer nanoparticles. Molecular dynamics simulations are presented for isolated spherical polymer brushes under good solvent conditions, varying the grafting densi…
Nowadays, there is a growing availability of biodegradable industrial materials intended to food contact applications whose service life behavior needs to be further investigated. This article is focused on the degradation of two materials based on polylactic acid. The correlation between the rate of degradation and t…
Abstract The knowledge on alkaline‐earth metal nitrides of main‐group elements with Perovskite structures of the general composition ( A 3 N x ) E is reviewed. Compounds with closely related crystal structures denoted as Ruddlesden‐Popper‐Series are also taken into account. In a second part, radii considerations are d…
Glass‐embedded Cd 1−x Co x S quantum dots (QDs) with mean radius of R ≈ 1.70 nm were successfully synthesized by a novel protocol on the basis of the melting‐nucleation synthesis route and herein investigated by several experimental techniques. Incorporation of Co 2+ ions into the QD lattice was evidenced by X‐ray dif…
The electrochemical and corrosion behaviour of a surface is extremely complicated and depends on various chemical, physical and mechanical factors.In this study the effect of different surface roughnesses on the corrosion resistance of nickel in 0.5 M sulphuric acid was investigated.Open circuit potential, corrosion c…
We have synthesized micrometer-sized Ag nanosheets via a facile, one-step, template-free electrochemical deposition in an ultra-dilute silver nitrate aqueous electrolyte. The nanosheet growth was revealed to occur in three stages: (1) formation of polygonal Ag nuclei on a substrate, (2) growth of {112}-faceted nanowir…
A novel delivery concept based on the integration of liposomes in hydrogel for the controlled release of liposomes was developed. As an in situ forming hydrogel, chitosan-glycerophosphate was used and gelation time at different temperatures was studied. Liposomes (DSPC/chol/DOPE) were labelled with (99m)Tc-hexamethylp…
Summary The antioxidant octyl gallate ( OG ) has been successfully grafted onto chitosan by means of horseradish peroxidase biocatalyst. The maximum gallate incorporation onto chitosan determined by 1 H NMR spectroscopy was up to 16 molar%. The resulting materials displayed antioxidant capacities with DPPH radical inh…
The dynamics associated with magnetic field alignment of a model rod–coil block copolymer poly(2,5-di(2′-ethylhexyloxy)-1,4-phenylenevinylene)- b -polyisoprene (PPV–PI) have been investigated using a combination of time-resolved in situ small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). Al…
The recently developed nonequilibrium extension of the self-consistent generalized Langevin equation theory of irreversible relaxation [Ram\'{\i}rez-Gonz\'alez and Medina-Noyola, Phys. Rev. E 82, 061503 (2010); Ram\'{\i}rez-Gonz\'alez and Medina-Noyola, Phys. Rev. E 82, 061504 (2010)] is applied to the description of…
A facile and novel process modified from the Stöber method has been developed to prepare Au-SiO2 asymmetric clusters with a number of Au nanoparticles off-center. The Au-SiO2 asymmetric clusters exhibit the wanted surface plasmons along with increases in the plasmonic near field and optical extinction efficiency. They…
Abstract A large manganese‐doped polyoxotitanate nanocluster, Ti 14 MnO 14 (OH) 2 (OEt) 28 , has been synthesized under solvothermal conditions. Its structure is similar to previously reported Ti 17 O 24 (O i Pr) 20 , but lacks 5‐fold coordinated Ti atoms which are potential binding sites for photosensitizer molecules…
Abstract Copper has been reported to be active in selective hydrogenation of acetylene but very selective to oligomers instead of ethylene. In this work, SBA‐15 supported Cu‐Au bimetallic nanoparticles are studied under different Cu/Au ratios and temperature. The addition of gold promotes the catalytic performance, re…
The high‐end applications of single‐walled carbon nanotubes (SWCNTs) are hindered by the existence of large amount of impurities, especially the graphene layers encapsulating metal nanoparticles (metal@C NPs). The role of working metal catalysts during chemical vapor deposition (CVD) growth and post purifications by o…
Abstract The transformation of vanadium(III) azides, [(nacnac)V(N 3 )(X)] n {nacnac = [ArNC(CH 3 )] 2 CH – , Ar = 2,6‐(CHMe 2 ) 2 C 6 H 3 ; X = Ntol 2 – , where tol = 4‐MeC 6 H 4 , n = 1; X = ArO – , n = 2}, to their corresponding vanadium(V) nitrides, [(nacnac)V≡N(X)], was investigated through an isotopic labeling cr…
Cyanido-bridged high-spin {Co II [Co II (MeOH) 3 ] 8 [W V (CN) 8 ] 6 } ( Co 9 W 6 ) clusters revealing single-molecule magnet behavior were combined with 4,4′-bipyridine- N, N ′-dioxide (4,4′-bpdo) linkers, giving unique H-bonded supramolecular {Co II 9 (MeOH) 24 [W V (CN) 8 ] 6 }·4,4′-bpdo·MeOH·2H 2 O ( 1 ) chains an…
We propose simple and practical method for creation of quantum dot (QD) systems in a porous matrix. The commercial filter paper is soaked in the colloidal solution of PbS QDs in carbon tetrachloride followed by drying. The samples prepared by the method demonstrate linear dependencies of optical density and photolumin…