Materials Literature
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Molecular Layer-by-Layer Growth of C60 Thin Films by Continuous-Wave Infrared Laser Deposition, Yaginuma, Seiichiro, Itaka, Kenji, Haemori, Masamitsu, Katayama, Masao, Ueno, Keiji, Ohnishi, Tsuyoshi, Lippmaa, Mikk, Matsumoto, Yuji, Koinuma, Hideomi
2-Hydroxyethyl methacrylate (HEMA) was used as initiator for the enzymatic ring-opening polymerization (ROP) of omega-pentadecalactone (PDL) and epsilon-caprolactone (CL). The lipase B from Candida antarctica was found to catalyze the cleavage of the ester bond in the HEMA end group of the formed polyesters, resulting…
The influence of p- and n-type electronic dopants on Mn incorporation in bulk Si and Ge is studied using first-principles calculations within density functional theory. In Si, it is found that the site preference of a single Mn atom is reversed from interstitial to substitutional in the presence of a neighboring n-typ…
Much attention has been focused on exploiting novel strategies for the creation of hierarchical polymer assemblies by the control of the assembling number or the relative location among neighboring polymers. We here propose a novel strategy toward the creation of "hierarchical" single-walled carbon nanotube (SWNT) arc…
Quasi-static thermo-electro-mechanical performance of annular and solid cylindrical piezoelectric actuators was studied by experimental means under electric fields varying from 0.3 to 1.8 kV mm −1 with a preload of 4.6 MPa over the temperature range of −30 to 125 °C. It was found that, for both annular and solid actua…
Two-dimensional colloidal lithography is successfully applied to the fabrication of novel transparent carbon nanotube networks with controllable film resistance. The method adopted in this study produces ordered network structure with regular voids in the carbon nanotube network film, and results in transparency incre…
The electronic structure of the (Pb,Sn)Te alloy displays the so-called ``band inversion'' between its two end members, PbTe and SnTe. Although the electronic structures of these two end members have been extensively studied by first-principles calculations, there have been no reports of first-principles calculations o…
Tunable arrays of C60 linear chains on the α-sexithiophene (6T) bilayer or monolayer surface nanotemplates are formed by careful control of the delicate balance between the intermolecular and the interfacial interactions using different experimental conditions, that is, various C60 and 6T surface coverages and post-an…
Parallel, linear gold nanoparticle arrays with a periodic lateral spacing have been created via templated assembly. The template is a de novo designed peptide that self-assembles into β-sheet fibrils exhibiting a laminated morphology. Regular arrangement of positively charged lysine residues across the width of the fi…
ZrO 2 ceramic coatings were prepared in situ on an AZ91D Mg alloy by plasma electrolytic oxidation in a K 2 ZrF 6 solution. The phase composition and the surface morphology of the coatings were examined with X‐ray diffraction and scanning electron microscopy. The thermal shock resistance of the coatings was evaluated…
Abstract Acid‐catalyzed condensation of meso ‐pentafluorophenyl dipyrromethane 1 (100 m M ) and pentafluorobenzaldehyde 2 (100 m M ) at 0 °C gave a series of expanded porphyrins with even number of pyrrolic subunits up to octadecaphyrin(1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1) 18 in improved yields, particularly for large…
Abstract A series of Ni-doped cobalt ferrites NixCo1−xFe2O4 (x = 0.0, 0.4, 0.6, 0.8, and 1.0) were prepared using microwave-induced combustion. Nickel, cobalt, and ferric nitrates were used as starting materials and glycine as fuel. The influence of Ni content on the lattice parameter, stretching vibrations, and magne…
Orientation-dependent Raman measurements on single wurtzite CdS nanowires with an average diameter of 60 nm have been performed. The resonance Raman spectra of nanowires are compared with those of bulk ribbon. Different from the bulk sample, the intensity of most Raman bands of the nanowires are polarized along the lo…
Using soft-x-ray diffraction at the site-specific resonances in the Fe L2,3 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. The spectra show directly that the (001/2) diffraction peak (in cubic notation) is caused by t2g orbital ordering at octahedral Fe2+ sites a…
We obtain the self-energy of the electronic propagator due to the presence of Holstein polarons within the first Born approximation. This leads to a renormalization of the Fermi velocity of 1%. We further compute the optical conductivity of the system at the Dirac point and at finite doping within the Kubo formula. We…
Single crystals with the composition of 0.71Pb(Mg 1/3 Nb 2/3 )O 3 –0.29PbTiO 3 (PMNT29) were grown using the solid‐state crystal growth (SSCG) method. Compared with the conventional Bridgman grown crystals, the SSCG PMNT29 crystals were found to possess comparable piezoelectric, dielectric, and electromechanical prope…
We numerically study the jamming transition in particulate systems with attraction by investigating their mechanical response at zero temperature (T=0). We find three regimes of mechanical behavior separated by two critical transitions--connectivity and rigidity percolation. The transitions belong to different univers…
Nanorods embedded in polymeric capsules are used as wavelength-selective absorption centers to trigger the opening of the capsules and release of their contents upon laser illumination. The figure illustrates that by tuning the position of the surface plasmon peak of the nanorods, the microcapsules can be made sensiti…
DNA–single-walled carbon nanotube (SWNT) hybrid fibers are fabricated. Partial debundling and alignment of the nanotubes reduces junction resistances leading to high conductivities. The DNA is effective, as a mechanical binder and for debundling the SWNTs, even when immersed in liquid electrolytes. Therefore, the DNA–…
We report a dielectric constant of up to 5.4 × 10 5 at room temperature and 1 kHz for CaCu 3 Ti 4 O 12 (CCTO) ceramics, derived from multiphase powders (coprecipitation products), made by a “chimie douce” (coprecipitation) method, and then sintered in air. The sintered products are pure‐phase CCTO ceramics. The high d…