Materials Literature
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A newly prepared single-component molecular metal, [Pt(tmdt)2], exhibited very high conductivity and metallic behavior down to 4 K in the compacted polycrystalline state. A ‘conducting paint’ of [Pt(tmdt)2] obtained by kneading the microcrystals with lacquer and thinner showed metallic conductivity at around room temp…
In order to understand the morphology of oxidized positions in single-wall carbon nanotubes (SWNTs), several chemical models, resulting from the interaction of an armchair (5,5) carbon nanotube (a(5,5)) with molecular oxygen and water, have been proposed. Structural and thermodynamic properties were calculated using t…
Octakis(3-chloropropyl)octasilsesquioxane, obtained recently by a new method, has enabled a highly efficient synthesis of a whole family of cube-like T8 silsesquioxanes by nucleophilic substitution of chlorine atom with appropriate nucleophilic agents. Five functionalized silsesquioxanes, i.e., octakis[3-(methacryloyl…
Bi 2 Te 3 thin films, composed of ordered nanowire arrays, have been successfully fabricated by a convenient physical vapor deposition method without using any template. The composition and microstructure of these films were determined by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and high res…
Binary metal-semiconductor Zn/ZnO core−shell nanorods have been synthesized through an ethylenediamine-assisted low-temperature hydrothermal process. Well-crystalline wurtzite phase ZnO was epitaxially grown along the [0100] direction, perpendicular to the single-crystalline Zn nanorod cores grown along the [0002] dir…
In the past, the crystallographic relationship between the γ-phase and the α-phase in isotactic polypropylene (i-PP) was extensively studied and established via i-PP oligomers of which the γ-phase can be formed at atmospheric pressure. We attempt to investigate how the epitaxial domination of the crystal morphologies…
Recently, several groups of investigators (Anderson, Halas, Zharov, El-Sayed and their co-workers (Pitsillides et al 2003 Biophys. J. 84 4023-31, Zharov et al 2003 Appl. Phys. Lett. 83 4897-9, Zharov et al 2004 Proc. SPIE 5319 291-9, Loo et al 2005 Nano Lett. 5 709-11, Gobin et al 2007 Nano Lett. 7 1929-34, Fu et al 2…
Orotidine 5'-monophosphate decarboxylase (OMPDC) is an exceptionally proficient catalyst: the rate acceleration (k(cat)/k(non)) is 7.1 x 10(16), and the proficiency [(k(cat)/K(M))/k(non)] is 4.8 x 10(22) M(-1). The structural basis for the large rate acceleration and proficiency is unknown, although the mechanism has…
We have performed global structural optimizations for neutral lead clusters Pb(n) (n = 2-20) by using a genetic algorithm (GA) coupled with a tight-binding (TB) potential. The low-energy structures identified from a GA/TB search were further optimized at the DFT-PBE level. The calculated results show that the Pb(n) (1…
This study concerned the effect of the substrate on the nucleation and growth behavior of Ge 2 Sb 2 Te 5 (GST) thin films deposited by a combination of plasma-enhanced chemical vapor deposition (for Sb and Te) and plasma-enhanced atomic layer deposition (for Ge) processes at wafer temperatures ranging from 100 to 200…
By simultaneous mechanical characterisation and synchrotron wide-angle x-ray scattering (WAXS) and small-angle x-ray scattering (SAXS), it is possible to characterise on-line local changes in a polymer's structure with a rather-high time and space resolution, together with the mechanical properties. In this contributi…
Crystalline silicon is a poor UV−visible−near IR emitter because of its indirect, narrow band gap and low quantum yield of ∼1 × 10 −2 % at room temperature. To effectively confine a photoexcited electron−hole pair (exciton) within Si’s Bohr radius of ∼5 nm, we have theoretically and experimentally explored several low…
Combining single-walled carbon nanotubes (CNT) with biological molecules provides a route to novel nanoscale materials with many promising applications in nanotechnology and nanomedicine. Recent experiments show that CNTs covalently functionalized with the coxsackie-adenovirus receptor (CAR) serve as biosensors capabl…
Abstract We synthesized a phenoxymethyl‐substituted polystyrene (PHP) and a series of 4‐alkylphenoxymethyl‐substituted polystyrenes, where the alkyl group is (CH 2 ) n H ( n = 1, 2, 4, 6, and 8), using polymer analogous reactions, in order to study the effect of the phenoxymethyl and 4‐alkylphenoxymethyl side groups…
A simple methodology for integrating single-walled carbon nanotubes (SWNTs) onto complementary metal oxide semiconductor (CMOS) circuitry is presented. The SWNTs were incorporated onto the CMOS chip as the feedback resistor of a two-stage Miller compensated operational amplifier utilizing dielectrophoretic assembly. T…
Submicron particles of mesoporous MSU-2 silica have been obtained by using Tergitol NP-9 as nonionic surfactant and TEOS as silica precursor. The material has been chemically modified with 5-mercapto-1-methyltetrazole and characterized by powder X-ray diffraction, TEM, SEM, N2 adsorption, FT-IR spectroscopy, 29Si-NMR…
Using first-principles density functional theory calculations, various junction models constructed from different carbon nanotube and graphene nanoribbon units via covalent linkage have been envisioned. These models consist of linear, T- and H-shaped junctions within the connection modes between carbon nanotube and gr…
Bicrystalline ZnS microbelts with unusual structures were synthesized using chemical vapor deposition while adding MnO 2 into standard ZnS precursor. High-resolution transmission electron microscopy (HRTEM) and electron diffraction (ED) analyses showed that two neighboring crystals within each bicrystal are composed o…
A detailed phase diagram, revealing a variety of processes including various colloidal structures of monodisperse charged colloidal particles from the colloidal chains, vortex rings, three-dimensional aggregation to a two-dimensional crystal under different frequencies, and strengths of an alternating electric field,…
Abstract In this research, we have investigated the effects of addition of different percentages of nanoclay to the ethylene propylene diene monomer (EPDM) and nitrile butadiene rubber (NBR) on the characteristics of these rubbers as seal material. Properties such as tensile strength, modulus at different extensions,…