Materials Literature
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This paper presents the work undertaken to determine the influences on the photo-induced growth of silver nanoclusters on the surfaces of lead zirconate titanate thin films. The lead zirconate titanate films were grown on indium tin oxide coated glass. They exhibited a highly textured surface and can be treated as wid…
The development and characterization of a unique conjugated structure comprised of γ-Fe 2 O 3 nanoparticles (NPs) and PbSe nanocrystal quantum dots (NQDs), bonded via chemical functional groups, are discussed. Compatibility with an aqueous environment was rendered by exchanging the traditional organic surfactants (ole…
The effect of atomic hydrogen treatment upon the surface of partially graphitized nanodiamonds has been studied by photoemission spectroscopy. The $\mathrm{C}1s$ core level peak and valence band spectra of a partially graphitized nanodiamond sample were compared with those following hydrogen treatment and following su…
Nanostructured host-guest materials are important for various applications in nanoscience, and therefore, a thorough understanding of the dynamics of the guest molecules within the host matrix is needed. To this aim we used single-molecule fluorescence techniques to simultaneously examine the spectral and the orientat…
We show that polyoxometalate (ammonium phosphomolybdate) Keggin in aqueous dispersions upon sonication spontaneously transforms into micrometer-sized, peapod-shaped structures. The formation of these peapods is preceded by the generation of spherical aggregates. The particles have been characterized experimentally by…
Quantum dots (QD) of a CdSe-ZnS core-shell structure are coated with silica spheres to improve their stability in biological buffers and biocompatibility in fluorescence imaging. We found that it was critical to transfer quantum dots from organic phase to aqueous phase before the silica shell growth process. As a resu…
Abstract Inelastic neutron scattering measurements are reported for the optical phonon branches of wurtzite ZnO. The experimental data are in excellent agreement with the ab‐initio calculations for the phonon dispersion relations based on linear response theory. Discrepancies between theory and present data observed f…
Three types of rationally designed peptide loops were genetically engineered for display on the surface of the FliTrx E. coil flagella scaffold, a type of bacterial bionanotube adapted for the multivalent display of peptide loops. The resulting three types of loop flagella fibers were used to demonstrate the feasibili…
Auf dem Weg zu selektiven NIR-Absorbern: Eine Versteifung der Chromophore durch Substitution des Protons der NH⋅⋅⋅N-Brücke durch die BR2-Gruppe (R=F, Ph) führt in NIR-Farbstoffen mit intramolekularen H-Brücken infolge des Polymethincharakters der Chromophore zu Verbindungen mit intensiver Raumtemperatur-Fluoreszenz,…
A new method has been developed to precisely cut and to sharpen carbon nanotubes using a 'nanoknife', which is a short carbon nanotube adhered to a metal tip. The mechanism for the cutting and the sharpening was proposed to be local vaporization of carbon caused by Joule heating. The 'nanoknife' was also found useful…
Novel architectures with nanometric dimensions hold an immense promise as building blocks for future nanotechnological applications. Biological nanostructures are of special interest due to their biocompatibility and because they allow the utilization of biochemical recognition interfaces. The ability to decorate bio-…
The charge transport of boron carbide, often incorrectly denoted as B(4)C, has been controversially discussed. It is shown that the bipolaron hypothesis is not compatible with numerous experimental results. In particular, the determined real microstructure of boron carbide and its related electronic properties disprov…
The pressure dependence of shifts in the vibrational modes of individual carbon nanotubes is strongly affected by the nature of the pressure transmitting medium as a result of adsorption at the nanotube surface. The adsorbate is treated as an elastic shell which couples with the radial breathing mode (RBM) of the nano…
Erhellt: Siliciumoxid-Nanopartikel mit einem lumineszierenden Kern und einer paramagnetischen Hülle wurden hergestellt, und ihre Nützlichkeit als multimodale Imaging-Sonden wurde in vitro nachgewiesen. Monozyten wurden mit den hybriden Nanopartikeln mit einer Effizienz von über 98 % markiert, ohne dass selbst bei eine…
Reaction of in situ generated copper(II)-monosubstituted Keggin polyoxometalates and copper(II)-phenanthroline-oxalato complexes in ammonium or rubidium acetate buffers led to the formation of the hybrid inorganic-metalorganic compounds E4[Cu(phen)(H2O)4]2[Cu4(phen)4(H2O)4(ox)3]0.6[Cu2(phen)2(H2O)4(ox)]0.4[Cu(phen)(ox…
Adsorption of polyethyleneimine (PEI)-metal ion complexes onto the surfaces of carbon nanotubes (CNTs) and subsequent reduction of the metal ion leads to the fabrication of one-dimensional CNT/metal nanoparticle (CNT/M NP) heterogeneous nanostructures. Alternating adsorption of PEI-metal ion complexes and CNTs on subs…
The minimum energy geometric structures of Aln, A[Formula: see text] , and A[Formula: see text] (4 ≤ n ≤ 15) are predicted from the results of "Tabu Search" (TS) global optimizations performed directly on the BPW91/LANL2DZ potential energy surface. In 24 of the 36 cases investigated, the TS delivered a lower energy st…
Cooler without water: γ-Alumina has been synthesized at 200 °C in benzylamine and at 160 °C in dimethyl sulfoxide using aluminum acetylacetonate as the precursor, the lowest temperature that such materials have been prepared. In contrast to aqueous sol–gel process with aluminum oxide precursors, where aluminum (oxy)hy…
X-ray absorption spectroscopy has been used to characterize the evolution in the conduction band (CB) density of states of CdSe quantum dots (QDs) as a function of particle size. We have unambiguously witnessed the CdSe QD CB minimum (CBM) shift to higher energy with decreasing particle size, consistent with quantum c…
Fruits of the forest: A desktop reactor rapidly grows forests of aligned carbon nanotubes (CNTs) to heights of many millimeters by atmospheric-pressure chemical vapor deposition (see picture). This low-cost apparatus achieves the reaction temperature by resistive heating of a suspended silicon platform, and achieves a…