Materials Literature
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A simple two-stage technique for producing turbostratic carbon nanotubes via the co-electrospinning of two polymer solutions is described. These strong carbon nanotubes (see Figure) can be produced in lengths of the order of 10 cm while still maintaining submicrometer inner and outer diameters. They can be used in num…
Uniform, well-defined star-shaped PbS nanocrystals with tunable sizes (40–100 nm, see Figure), as well as octahedral PbS nanocrystals, have been readily synthesized in aqueous solutions containing a mixture of the surfactants cetyltrimethylammonium bromide/ sodium dodecyl sulfate (CTAB/SDS) at low temperature (80 °C).…
Electronic properties of dye-sensitized semiconductor nanocrystals, consisting of perylene (Pe) chromophores attached to 2 nm TiO2 nanocrystals via different anchor-cum-spacer groups, have been studied theoretically using density functional theory (DFT) cluster calculations. Approximate effective electronic coupling s…
A method is proposed to pin down unambiguous proof for single-molecule sensitivity in surface enhanced Raman spectroscopy (SERS). The simultaneous use of two analyte molecules enables a clear confirmation of the single (or few)-molecule nature of the signals. This method eliminates most of the uncertainties associated…
We demonstrate here the effective delivery of a dye payload into cells using 2-nm core gold nanoparticles, with release occurring via place exchange of glutathione onto the particle surface. In vitro experiments demonstrate effective release of drug analogues upon addition of glutathione. Cell culture experiments show…
Abstract For Abstract see ChemInform Abstract in Full Text.
We show a unique pressure effect on the electronic structure of a layered organic solid ${\ensuremath{\beta}}^{\ensuremath{'}}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{2}\mathrm{Au}{\mathrm{Cl}}_{2}$ by a theoretical study based on density functional theory. At ambient pressure, atomic a…
The phonon dispersion relation and specific heat of single-walled ${\mathrm{BC}}_{3}$ nanotubes have been investigated using a force constant model. The obtained phonon dispersion relation of ${\mathrm{BC}}_{3}$ sheet reproduces well the experimental data. The tube-diameter dependent frequencies of both the radial bre…
The effect of incommensurate potential on Fermi surface (FS), which loses any translational symmetry in the energy bands, is investigated in the organic superconductor $(\mathrm{MDT}\text{\ensuremath{-}}\mathrm{ST}){({\mathrm{I}}_{3})}_{0.417}$, where MDT-ST is $5H$-2-(1,3-dithiol-2-ylidene)-1,3-diselena-4,6-dithiapen…
Abstract Poly( D , L ‐lactide‐ co ‐glycolide) (PLGA) and poly(ethylenimine) (PEI) were blended and found to form a homogeneous pH sensitive matrix for drug release. Differential scanning calorimetry (DSC) studies of the PLGA/PEI blends showed a single glass transition temperature at all compositions. Fourier transform…
Abstract A series of acrylic impact modifiers (AIMs) with different particle sizes ranging from 55.2 to 927.0 nm were synthesized by seeded emulsion polymerization, and the effect of the particle size on the brittle–ductile transition of impact‐modified poly(vinyl chloride) (PVC) was investigated. For each AIM, a seri…
The electronic band structure, electron-phonon interaction, and superconducting transition are investigated for the (5,5), (10,10) armchair and (5,0) zigzag single walled carbon nanotubes (SWCNT). While the electron-phonon interaction and superconducting transition temperature are very small in (5,5) and negligibly sm…
Hysteretic switching in the magnetoresistance of short-channel, ferromagnetically contacted individual single wall carbon nanotubes is observed, providing strong evidence for nanotube spin transport. By varying the voltage on a capacitively coupled gate, the magnetoresistance can be reproducibly modified between +10%…
Well aligned densely packed IrO2 nanocrystals (NCs) have been grown on sapphire (SA) substrates with different orientations by reactive magnetron sputtering using an Ir metal target. The surface morphology, structural and spectroscopic properties of the as-deposited NCs were characterized using field-emission scanning…
We simulate morphology and its evolution of vicinal surfaces in epitaxy by using the phase-field model. For usual parameters of Cu vicinal surfaces, a pure in-phase meandering pattern consistent to the experimental images is obtained. Nevertheless, vicinal surfaces grow into more complex hierarchy for a small kink ene…
A reflection holographic method is introduced to fabricate an electro-optically tunable twisted nematic (TN) liquid crystal (LC) grating, forgoing the geometrical drawing. The photoisomerization process occurring on the LC alignment layers of an LC cell in the reflection holographic configuration gives a control over…
Abstract The metal carbides Li 2 C 2 , NaHC 2 , and CaC 2 , as well as acetylene, have been decomposed thermally and by metathesis reactions with selected transition‐metal halogenides as catalyst precursors in the temperature range of 550–1000 °C. All reactions have been performed in selected salt fluxes which dissolv…
Abstract ABS/PVC blends were prepared over a range of compositions by mixing PVC, SAN, and PB‐ g ‐SAN. All samples were designed to have a constant rubber level of 12 wt % and the ratio of total‐SAN to PVC in the matrix of the blends varied from 70.5/17.5 to 18/80. Transmission electron microscope and scanning electro…
Manganese(II), iron(II), cobalt(II), and copper(II) derivatives of two inherently chiral, Tris(bipyridyl) cages (L and L') of type [ML]-(PF(6))(2)(solvent)(n) and [FeL'](ClO(4))(2) are reported, where L is the hexa-tertiary butyl-substituted derivative of L'. These products were obtained by using the free cage and met…
Abstract For Abstract see ChemInform Abstract in Full Text.