Materials Literature
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The length, loading rate and thermal effects on the torsional response of hollow copper nanowires are investigated with molecular dynamics simulation. Evolution of atomic configuration is studied, which shows that partial dislocations nucleated from the surfaces accommodate the plastic deformation of the nanowires und…
We refined the magnetic structure of a ferroelectric (FE) phase of multiferroic ${\text{CuFe}}_{1\ensuremath{-}x}{\text{Ga}}_{x}{\text{O}}_{2}$ with $x=0.035$ by complementary use of spherical neutron polarimetry and a four-circle neutron-diffraction measurement, revealing that the proper-screw-type magnetic structure…
The mechanoluminescence (ML) of SrAl2O4:Eu2+,Dy3+ (SAO) phosphors was monitored as a function of its instantaneous loading rate, on which it was found to be strongly dependent. The effect of the loading rate on the ML of SAO was investigated in a systematic manner using rate equations involving the loading rate term.…
The synthesis, structures and magnetic properties of a family of heterometallic [Mn(III)(5)Ln(III)(8)(mu(3)-OH)(12)(L(2))(4)(piv)(12)(NO(3))(4)(OAc)(4)](-) (Ln = Pr, 2; Nd, 3; Sm, 4; Gd, 5; Tb, 6) aggregates are reported. The complexes were obtained from the direct reaction of N-(t)butyldiethanolamine (H(2)L(2)) with…
High quality CdS nanorods are synthesized reproducibly with cadmium acetate and sulfur as precursors in trioctylphosphine solution. The morphology, crystalline form and phase composition of CdS nanorods are characterized by transmission electron microscopy (TEM), high-resolution TEM and X-ray diffraction (XRD). CdS na…
The water-dispersed conductive polypyrroles (PPys) were prepared via the chemical oxidative polymerization with lignosulfonate (LGS), an inexpensive byproduct from pulp processing industries, as a dopant and template for tuning the properties of polypyrrole nanoparticles. The lignosulfonate doped polypyrrole (PPy/LGS)…
Type II CdTe-CdSe colloidal nanocrystal heterostructures in a variety of shapes (fat rods, Y-shape rods, and tetrapods) were prepared using a seeded growth method based solely on different sized CdTe seeds. The tailoring of the shape of nanocrystal heterostructures provides a way to modify interfacial charge-transfer…
Chemical bath deposition of ZnO thin films using six different complexing agents, namely ammonia, hydrazine, ethanolamine, methylamine, triethanolamine and dimethylamine, is investigated. As-grown films were mainly ZnO(2) with a band gap around 4.3 eV. Films annealed at 400 degrees C were identified as ZnO with a band…
Silicon nanocrystals (Si-nc) is an enabling material for silicon photonics, which is no longer an emerging field of research but an available technology with the first commercial products available on the market. In this paper, properties and applications of Si-nc in silicon photonics are reviewed. After a brief histo…
Even though there is a high degree of scientific uncertainty about the risks of nanotechnology, many scholars have argued that policy-making cannot be placed on hold until risk assessments are complete (Faunce, Med J Aust 186(4):189-191, 2007; Kuzma, J Nanopart Res 9(1):165-182, 2007; O'Brien and Cummins, Hum Ecol Ris…
We report a multilayer film of poly(vinyl alcohol) (PVA)-borate complex and chitosan by using a layer-by-layer approach. PVA is an uncharged polymer, but hydroxyl functional groups of PVA can be cross-linked by using borax as a cross-linking agent. As a result electrostatic charges and intra- and interchain cross-link…
Photoresponsive Liganden als Umhüllung machen Metallnanopartikel (NPs) zu „Tinten“ für selbstradierendes „Papier“, indem die lichtinduzierte Assoziation der NPs in lokale Farbwechsel übersetzt wird (siehe Bild). Je nach Ausmaß der Assoziation können vielfarbige Bilder mit nur einer Art von NP-Tinte geschrieben werden.…
A study of ``inverted'' core-shell, $\mathrm{MnO}/\ensuremath{\gamma}\mathrm{\text{\ensuremath{-}}}{\mathrm{Mn}}_{2}{\mathrm{O}}_{3}$, nanoparticles is presented. Crystal and magnetic structures and characteristic sizes have been determined by neutron diffraction for the antiferromagnetic core (MnO) and the ferrimagne…
In this paper, we review the present status of light emitters based on SiGe nanostructures. In order to be commercially valuable, these light emitters should be efficient, fast, operational at room temperature, and, perhaps most important, compatible with the ldquomainstreamrdquo complementary metal-oxide-semiconducto…
The transport properties of oxygen‐ion conducting yttria‐stabilized zirconia (YSZ)—featuring mean grain sizes from a few nm up to the μm regime—were studied with regard to grain‐size effects. Chemically homogeneous, 8.3 mol% YSZ thin films (thickness approximately 400 nm) were processed on single‐crystal sapphire subs…
The development of multidrug resistance (due to drug efflux by P-glycoproteins) is a major drawback with the use of paclitaxel (PTX) in the treatment of cancer. The rationale behind this study is to prepare PTX nanoparticles (NPs) for the reversal of multidrug resistance based on the fact that PTX loaded into NPs is n…
Shear-induced melting and crystallization were investigated by confocal microscopy in concentrated colloidal suspensions of hard-sphere-like particles. Both silica and polymethylmethacrylate suspensions were sheared with a constant rate in either a countertranslating parallel plate shear cell or a counterrotating cone…
A small-angle X-ray scattering (SAXS) set-up has recently been developed at beamline I711 at the MAX II storage ring in Lund (Sweden). An overview of the required modifications is presented here together with a number of application examples. The accessible q range in a SAXS experiment is 0.009-0.3 A(-1) for the stand…
Dense samples of ZrB 2 –20 vol% SiC were successfully fabricated by spark plasma sintering without the use of sintering aids. Oxidation behavior of these samples was characterized by exposing them to 1400°, 1500°, and 1600°C in an ambient atmosphere for 150 min, and by measuring the weight gains of the sample and cruc…
We report a numerical study of quantum transport in zigzag graphene nanoribbons with varying edge-disorder profile. The transport length scales, such as the elastic mean-free paths and the localization lengths, are shown to fluctuate by orders of magnitude depending on the topology of edge irregularities as well as th…