Materials Literature
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A sonochemical approach has effectively been applied to prepare aqueous dispersions of air-filled nanostructured quartz silica shells from surface-engineered amorphous silica nanoparticles. The non-equilibrium nature of the cavitation process and high temperature and pressure in the cavitation microbubble can lead to…
The rich physics in the overdoped regime in colossal magnetoresistive manganites is discussed in detail. Apart from having a large magnetoresistance like its underdoped counterpart, the overdoped regime offers a rich variety of phenomena including magnetic, charge and orbital order at low temperatures. The antiferroma…
Spinel ferrite nanoparticles (AFe 2 O 4 ; A = Mn, Ni, Cu, Co) of around 10–20 nm have been successfully synthesized via a simple nanocasting route using metal nitrates as precursors and mesoporous silica gel as a hard template. Spinel nanoparticles were formed under a nitrogen atmosphere by the high-temperature decomp…
Modulation of a fluorescence switch based on photochromic spirooxazine in composite organic nanoparticles, Sheng, Xiaohai, Peng, Aidong, Fu, Hongbing, Liu, Yuanyuan, Zhao, Yongsheng, Ma, Ying, Yao, Jiannian
GdAl 3 (BO 3 ) 4 nanorods doped with rare-earth ions have been obtained via a combustion synthesis. The nanorods have been characterized by x-ray diffraction, micro-Raman spectra, various microscopy techniques and fluorescence measurements. The results show that the nanorods are of straight morphology and smooth surfa…
Single wall carbon nanotubes (SWCNTs) often aggregate into bundles of hundreds of weakly interacting tubes. Their cross-polymerization opens new possibilities for the creation of new super-hard materials. New mechanical and electronic properties are expected from these condensed structures, as well as novel potential…
Ein Schluck frische Luft: Mesoporöses Manganoxid (γ-MnO2) wurde gemeinsam mit Goldnanopartikeln mithilfe einer durch Vakuum-UV unterstützten Laserablationsmethode abgeschieden, was zu sehr starken Metall-Träger-Wechselwirkungen führte. Das Komposit entfernt viele flüchtige organische Verbindungen (sowie NOx und SO2) a…
Molecular dynamics studies based on the Brenner-Tersoff second-generation reactive empirical bond order potential and the Lennard-Jones carbon-carbon potential for intra- and inter-layer interactions have been performed for carbon nanotubes. These potentials reproduce reasonably the carbon-carbon distances and inter-l…
MIICl2 (M = Mn, Fe, Co) as their acetonitrile solvates were isolated, and their structural, spectroscopic, and magnetic properties were studied. MCl2(NCMe)2 (M = Fe, Mn) form 1-D chains of octahedral MII ions with four bridging chlorides and two axial MeCN's. The presence of an axial distortion for MFe causes a signif…
Noncovalent functionalization of carbon nanotubes with meso-tetraphenylporphine (H2TPP) and its metal(II) complexes NiTPP and CoTPP was studied by means of different experimental techniques and theoretical calculations. As follows from the experimental adsorption curves, free H2TPP ligand exhibits the strongest adsorp…
We demonstrate a technique for the patterning of conducting polyaniline nanowires on metallic substrates. Electrochemical synthesis of template-free polyaniline nanowires is initially preceded by the formation of a thin compact 2D layer, which we show spreads horizontally from the edge of a gold electrode across a SiO…
A fascinating nano-object, amphiphilic polymer brushes with a hard core of multiwalled carbon nanotubes (MWNTs) and a relatively soft shell of polystyrene- block -poly ( N -isopropylacrylamide) (PS- b -PNIPAM), was easily constructed by in situ surface reversible addition–fragmentation chain transfer (RAFT) polymeriza…
The effect of thermostat configurations on the mechanical behavior of empty and butane (n-C4H10) filled (10, 10) carbon nanotubes (CNTs) is examined using classical, atomistic, molecular dynamics (MD) simulations. In particular, the influence of different types of thermostats, relative numbers of thermostat atoms, and…
Abstract A series of Prussian blue analogues, Rb x Mn[Fe(CN) 6 ] y · z H 2 O with different stoichiometries have been synthesized. Elemental analyses reveal a quasilinear decrease in x and y when z increases. Some of these samples present a first‐order phase transition between the Mn II –Fe III and Mn III –Fe II elect…
ZnO sheet arrays were vertically aligned onto an aluminium flake after pyrolysis of Zn 5 (OH) 8 Cl 2 H 2 O sheets which were fabricated in aqueous zinc chloride and hexamethylenetetraamine solution. The ZnO sheets, with diameter of 0.5–1 µm and thickness of 30–50 nm, incline to have satisfactory configuration of verti…
Abstract Multiwalled carbon nanotubes (MWCNTs) have been synthesized by the floating catalyst method using toluene as the carbon source and mixtures of ferrocene and ferrocenyl sulfide as the catalyst. Products were characterized by both low‐resolution and high‐resolution (HR) TEM analysis. It was found that the prese…
The substitution of aluminum oxide into rutile (TiO 2 ) has major effects on crystal growth, cation diffusivity, and conductivity and, critical for its widespread application as a white pigment, inhibits photocatalytic activity. High-field, high-resolution 27 Al NMR provides unique constraints on the type and concentr…
SiGe-on-insulator (SGOI) structures were thermally oxidized to form Ge quantum dots (QDs) that are embedded in a SiO 2 matrix, to systematically investigate possible structural factors that affect the properties of Ge QDs, such as size, density and even position. The properties of Ge QDs depend strongly on the layer t…
Synthetic graphite particles 0.2 microns in diameter react with O3 at room temperature with evolution of CO2. Graphite is less reactive with ozone than carbon blacks having different surface area ranging from 120 to 8 m2/g, but graphite reactivity is comparable to that shown by powdered solid C60 and C70 fullerenes. T…
Silk fabrics were treated with chlorosulphonic acid in pyridine for different times. The amount of sulfur bound to silk increased during the first 2 h of reaction and then reached a plateau. The amino acidic pattern of sulfated silk remained essentially unchanged for short reaction times (< or =2 h). Longer reaction t…