Materials Literature
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The development of luminescent inorganic nanocrystals (NCs) doped with rare-earth (RE) ions has attracted increasing interest owing to their distinct optical properties and versatile applications in time-resolved bioassays, multiplex biodetection, DNA hybridization and bioimaging. Hexagonal TbPO4:Eu3+ NCs (10-30 nm) w…
The ability of chitosan biopolymer to coordinate vanadium, tungsten and molybdenum metallic species and to control their mineralisation growth provides a new family of surface-reactive organic-inorganic hybrid microspheres. Drying the resulting materials under supercritical conditions allowed the gel network dispersio…
The present work deals with inorganic-organic hybrid nanostructures capable of producing intense visible emission via upconversion (UC), downconversion (DC), and energy transfer (ET) processes which show the potential of the material as a luminescent solar collector (LSC), particularly to improve the efficiency of sil…
The present work reports on the study of the influence of the composition in stereomer on the mechanical behavior of d - and l -lactic acid stereocopolymers in relation with strain-induced structural evolution. The stress–strain behavior and structural changes upon stretching above the glass transition temperature hav…
Although Brust-Schiffrin two-phase synthesis is a popular method for synthesizing ligand-protected metal nanoparticles with an average size of less than 5 nm, the details on how the reactions can be controlled from a mechanistic point of view are still unclear, therefore hindering efforts to synthesize monodisperse me…
One-dimensional carbon atomic wires displaying sp hybridization have an appealing electronic and vibrational structure which profoundly affects their optical and transport properties. Here we investigated charge transfer in alternating triple–single bond carbon atomic wires (polyynes) terminated by phenyl rings and it…
Shape-controlled silver and palladium nanoparticles were for the first time synthesized by seed-mediated techniques in the presence of β-cyclodextrin (β-CD). Palladium and silver seeds were prepared by reduction of palladium or silver ions with sodium borohydride in the presence of sodium citrate dihydrate as a stabil…
The thickness effect on electric breakdown strength (EBD) of four kinds of polymers under nanosecond pulses is investigated. The polymers are polyethylene, PTFE, PMMA, and nylon. The test samples are 0.5-3.5 mm in thickness (d) and are immersed in transformer oil. The nanosecond pulse is based on a Tesla-type generato…
Gellan gum is an attractive biomaterial for fibrocartilage tissue engineering applications because it is cell compatible, can be injected into a defect, and gels at body temperature. However, the gelling parameters of gellan gum have not yet been fully optimized. The aim of this study was to investigate the mechanics,…
Graphene fabricated on a SiO 2 /Si substrate by mechanical exfoliation has two features: one is charge (electron and hole) puddles which inhomogeneously distribute on graphene flakes, and the other is ripples which exist in two-dimensional crystals. The effects of these two features on the chemical reactivity of graph…
Abstract There is an increasing interest in substituting today's films for food packaging applications with films based on renewable resources. For this purpose, rye arabinoxylans, unmodified and enzymatically debranched, were studied for the preparation of neat films and composite films reinforced with bacterial cell…
After thermal deposition of silver films onto n -layer graphenes, the following results have been obtained. First, the dependence of silver morphologies on the layer number is studied via controlling the sample temperature at 298, 333, and 373 K. This can be attributed to the changes in surface properties and/or surfa…
Schnell und leistungsfähig: Aus einem mehrlagigen Polyelektrolytfilm wurde ein feuchtigskeitsempfindlicher Aktuator hergestellt, der einen molekularen Läufer antreibt, der durch periodischen Wechsel der relativen Feuchte (RH) zwischen 11 und 40 % auf einem gerippten Substrat entlangschreitet (siehe Bild) und dabei das…
Recently, novel organic glassy materials that exhibit remarkable stability have been prepared by vapor deposition. The thermophysical properties of these new "stable" glasses are equivalent to those that common glasses would exhibit after aging over periods lasting thousands of years. The origin of such enhanced stabi…
Cinnamaldehyde is a naturally occurring α,β-unsaturated aldehyde. Its potential as a natural cross-linker to improve the physical performance of cast wheat gliadin films was evaluated. The cross-linking reaction was found to be dependent on the pH of the reaction medium, with pH 2 as the optimum. The water resistance…
This paper focuses on the corrosion process of 304 stainless steel in acidic NaCl solution during slow strain rate testing experiment by using electrochemical noise (EN) and acoustic emission (AE) techniques. Meanwhile, the EN and AE characteristics of corrosion process were studied. The results show that stress corro…
A novel one-dimensional (1-D) mixed-valent thioarsenate (III, V), {[Mn(phen)](3)(As(V)S(4))(As(III)S(3))}(n)·nH(2)O (1), with a noncentrosymmetric (NCS) polar packing arrangement has been obtained under solvothermal conditions. The noncondensed (As(III)S(3))(3-) anion in 1 is stabilized by coordinating to [Mn(II)(phen…
Water-soluble BODIPY dyes have been readily obtained by introduction of phosphonate fragments either on the boron for the green and yellow emitting dyes or on the side chain for the red emitting dyes. Hydrolysis of the phosphonate is realized at the end of the reaction sequence and allows isolation of the targets by p…
Abstract Cellulosefibrillen und ‐kristalle mit einem Durchmesser im Nanometerbereich sind naturbasierte Materialien mit einzigartigen und potenziell wertvollen Eigenschaften. Vor allem eröffnen diese neuartigen Nanocellulosen dem natürlichen Polymer Cellulose die stark expandierenden Einsatzgebiete nachhaltige Materia…
OBJECTIVE: Nanotechnology is the manipulation of matter on a near-atomic scale to produce nanoparticles with unique properties, allowing new commercial applications. Since nanoparticles exhibit unique physicochemical properties, they are likely to exhibit biological activity significantly different from fine-sized par…