Materials Literature
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Abstract Summary: In order to produce modified poly(lactic acid) (PLA) resins for applications requiring high melt viscosity and elasticity (e.g., low‐density foaming, thermoforming), a commercial PLA product has been reactively modified in melt by sequentially adding 1,4‐butanediol and 1,4‐butane diisocyanate as low‐…
Abstract Summary: Polypyrrole nanotubes with high electric conductivity and azo function have been fabricated in high yield via an in‐situ polymerization. During the process fibrillar complex of FeCl 3 and methyl orange (MO), acting as a reactive self‐degraded template, directed the growth of polypyrrole on its surfac…
Electrodynamic simulations of gold nanoparticle spectra were used to investigate the sensitivity of localized surface plasmon band position to the refractive index, n, of the medium for nanoparticles of various shapes and nanoshells of various structures. Among single-component nanoparticles less than 130 nm in size,…
We introduce an ultrathin donor-acceptor solar cell composed entirely of inorganic nanocrystals spin-cast from solution. These devices are stable in air, and post-fabrication processing allows for power conversion efficiencies approaching 3% in initial tests. This demonstration elucidates a class of photovoltaic devic…
Abstract Abstract W–C–N films have been deposited on a tetraethylorthosilicate (TEOS) interlayer dielectric with atomic layer deposition (ALD) cycles of WF 6 –N 2 –CH 4 gases and the exposure cycles of N 2 and CH 4 are synchronized with a pulse plasma. The W–C–N films on TEOS layer follow the ALD mechanism, keep a con…
Extensive molecular dynamics simulations are performed at 6% polydispersity to investigate the phase diagram of a polydisperse hard-sphere fluid and the dynamical behavior in each phase. As the volume fraction phi is increased, the existence of a supercooled liquid is suggested above phi = 0.5524 by the mean-field ana…
The mechanooptical behavior and structural organization processes in melt miscible PEN−PEI blends have been investigated in the rubbery state as influenced by blend composition, stretching temperature, and deformation rate. This was accomplished using a spectral birefringence system integrated in a specially built uni…
High-performance fluorescent probes which exhibit either on/off or dual color fluorescence switching in response to the presence of organic vapors with a rapid response, a high sensitivity and a high-contrast on/off signaling ratio were demonstrated on the basis of the vapor-controlled AIEE phenomenon.
In application of focused-ion-beam lithography and grazing Ar+ milling on the U-shape barrier layer of anodic alumina nanochannels, we fabricated a hexagonally symmetry aperture array with nominal diameter of 12±2nm and interspacing of 100±2nm. Besides long-range spatial ordering, the focused-ion-beam guided-grown pro…
In recent years, a large number of nano-size semiconductors have been researched for their potential applications in photovoltaic cell, optical sensor device and photocatalysts. Nano-size semiconductor particles reveal many interesting properties due mainly to their sizedependant optical properties. In this sense, man…
We have studied structural and transport properties of epitaxial NaxCoO2 thin films on (0001) sapphire substrate prepared by topotaxially converting an epitaxial Co3O4 film to NaxCoO2 with annealing in Na vapor. The films are c-axis oriented and in-plane aligned with [101¯0]NaxCoO2 rotated by 30° from [101¯0] sapphire…
Starburst dendrimers are receiving considerable attention as templates for the assembly of structured arrays of molecular components. This research motivates the development of improved methods for dendrimer characterization-specifically, for determining the numbers, distributions of numbers, and spatial distribution…
Abstract Nylon‐6/montmorillonite nanocomposites with different dispersion states of clay and different clay loadings were prepared by melt processing. The nanostructure and mechanical properties were also investigated. The influence of the montmorillonite dispersion state and clay content on the tensile fracture morph…
We investigate the effect of adding nonpolar solutes at atmospheric pressure on water's temperature of maximum density, isothermal compressibility, and isobaric heat capacity, using a statistical mechanical model of water solutions [H. S. Ashbaugh, T. M. Truskett, and P. G. Debenedetti, J. Chem. Phys. 116, 2907 (2002)…
We report observation of ring-shaped morphology formed in thin films of a cylinder-forming polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer cast from 1,1,2,2-tetrachloroethane (Tetra-CE) solution via relatively fast solvent evaporation rates, in which Tetra-CE is a good solvent for both blocks but…
Vertically well-aligned ZnO nanorods were synthesized without employing any metal catalysts on various substrates including glass, Si(111), 6H-SiC(0001) and sapphire (0001), which were pre-coated with c -oriented ZnO buffer layers, by simple physical vapour deposition. The alignments of the ZnO nanorods on the differe…
Self-catalytic behavior of multi-walled carbon nanotubes is proposed and validated experimentally under the conditions in which metal catalysis was previously figured to work only. The self-catalysis could support the nanotube nucleation and radial and axial developing processes. This result should lead to a new and b…
We present ab initio calculations of transport properties of the multiwalled carbon nanotubes (MWNTs). The tube-electrode contact mode is found to have crucial effects on the transport behavior of MWNTs. It is the outmost-shell contact between MWNT and electrodes that leads to the extensively observed outmost-shell-co…
An efficient two-step, chemoenzymatic synthesis of N -trifluoroacetyl doxorubicin-14-valerate (Valrubicin) from doxorubicin hydrochloride salt is reported. The key step is a lipase-catalyzed regioselective esterification of N -trifluoroacetyl doxorubicin using commercially available valeric acid as the acyl donor. The…
Ti 3 Si C 2 ∕ 3 Y - TZP (3mol% Yttria-stabilized zirconia) composites were prepared by spark plasma sintering. The effective dc conductivities of the composites have been measured and the percolation threshold was determined. The dielectric behavior of the composites was studied in the frequency range 102–4×107Hz. The…