Materials Literature
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Field-effect transistors have been fabricated using single-walled carbon nanotubes (SWCNTs) and double-walled carbon nanotubes (DWCNTs), and their electrical transport properties have been studied comparatively. While a semiconducting SWCNT exhibits better field-effect characteristics than a DWCNT counterpart, the DWC…
Electroless deposition of gold has been carried out on Si(100) surfaces precoated with laser ablated carbon layers of different thicknesses, and the resulting substrates have been characterized by a host of techniques. We first established the porous nature of the amorphous carbon layer by Raman and profilometric meas…
Reptational dynamics of bulk polymer chains on a time scale between the Rouse mode relaxation time and the so-called disengagement time is not compatible with the basic thermodynamic law of fluctuations of the number of segments in a given volume. On the other hand, experimental field-cycling NMR relaxometry data of p…
In this work, comparative analysis of processes in carbon arc and radio frequency (RF) plasma during fullerene synthesis has been presented. The kinetic model of fullerene formation developed earlier has been verified in both types of plasma reactors. The fullerene yield depended on carbon concentration, velocity of p…
The function of the N-terminal domain ( approximately 350 residues) of the Pta (phosphotransacetylase) enzyme of Salmonella enterica is unclear. Results from in vivo genetic and in vitro studies suggest that the N-terminal domain of Pta is a sensor for NADH and pyruvate. We isolated 10 single-amino acid variants of Pt…
Ultrafine ZnS nanowires have been grown successfully through thermal evaporation of zinc powder and sulfur powder at 580 and 90 °C respectively. The nanowires are mainly in the range of 5–12 nm in diameter, and several microns in length. X-ray diffraction and high-resolution transmission electron microscope analysis s…
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…