Materials Literature
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The carbon-nanotube (CNT) bundle is a potential candidate for deep-nanometer-interconnect applications due to its superior conductivity and current-carrying capabilities. A CNT bundle is generally a mixture of single-wall and multiwall CNTs (SWCNTs and MWCNTs) and has not been fully explored in previous studies. This…
The phase diagram for a system of model anisotropic particles with six attractive patches in an octahedral arrangement has been computed. This model for a relatively narrow value of the patch width where the lowest-energy configuration of the system is a simple cubic crystal. At this value of the patch width, there is…
Surface-enhanced Raman scattering (SERS) of 4-mercaptopyridine (4-Mpy) adsorbed on the surface of TiO 2 nanofibers coated with Ag nanoparticles was obtained. Several bands in the SERS spectra obtained are different from 4-Mpy adsorbed on the surface of Ag nanoparticles. This result indicates that the abrupt change of…
Using hydrazine hydrate (N 2 H 4 ·H 2 O) as the solvent, bundles of wurtzite ZnS nanowires with diameters of 10−25 nm and lengths about 5−8 μm have been synthesized in high yield via a solvothermal route. The formation process of ZnS nanowire bundles was studied, and it was found that the initially formed N 2 H 4 inte…
This paper presents the findings of experimental research into the chief characteristics of a new type of concrete made solely with alkali activated fly ash (AAFA): i.e., free of ordinary Portland cement (OPC). The results of testing to determine specific properties of the fresh concrete and the development of its mec…
The novel bisphthalonitrile containing benzoxazine (BPNBZ) has been synthesized using bisphenol-A, 4-aminophenoxylphthalonitrile and paraformaldehyde. The structure of the monomer was supported by FTIR spectroscopy, 1H-NMR, and 13C-NMR spectra, which have exhibited that the reactive benzoxazine ring and cyano groups e…
Editorial - invited by Prof. Tibor Czigany, no abstract required
The chemical modifications of poly (vinyl chloride) with aliphatic and aromatic alcohols compounds have been investigated at room temperature and atmospheric pressure, catalysed by a new green basic catalyst, the Maghnite-K+. The presence of ether groups in the products is proven by infra red spectroscopy (IR) as well…
The atom transfer radical polymerization (ATRP) of phenoxycarbonylmethyl methacrylate (PCMMA) with styrene (St) were performed in bulk at 110°C in the presence of ethyl 2-bromoacetate, cuprous(I)bromide (CuBr), and N,N,N’,N”,N”-pentamethyldiethyltriamine. Also, a series conventional free-radical polymerization (CFRP)…
A two-photon absorbing polymer has been prepared through radical copolymerization of methyl acrylate and a synthesized monomer containing a two-photon absorbing chromophore (E,E,E)-1,3,5-tristyrylbenzene (1), under conventional radical polymerization conditions. The synthesized polymer was characterized by nuclear mag…
Standard ZnO nanorods with a diameter of ∼150 nm show poor field emission performance. In an attempt to dramatically improve the field emission properties, we developed two alternative methods: The first one is to decrease the tip radius of nanorods down to ∼5 nm. The second one is to decorate the nanorods by small me…
The ease with which water is released from cellulosic fiber material during the manufacturing of paper can affect both the production rate and the consumption of energy during the manufacturing process. Important theoretical contributions to dewatering phenomena have been based on flow through packed beds of uniformly…
Segmented, nonchain extended polyurethanes and polyureas based on PTMO soft segments (SS) and hard segments (HSs) based on only single molecules of a diisocyanate were synthesized. Type and nature of the diisocyanate was systematically varied in order to analyze the effect of HS symmetry and type of linkage between th…
AIMS: We recently pioneered the cell electrospinning of living cells as viable biological threads and scaffolds. In that study, we demonstrated the process with an immortalized human brain astrocytoma (1321N1, European Collection of Cell Cultures) cell line at a cell concentration of 10(6) cells/ml. The next stage was…
High Resolution Image Download MS PowerPoint Slide We have studied gate hysteresis of carbon nanotube field-effect transistors (CNFETs) on silicon oxide substrates in an ultrahigh vacuum (UHV) at low temperatures. It is found that the hysteresis is neither reduced by thermal annealing at temperatures over 300 °C under…
Numerical aspects are investigated in ultra-large-scale electronic structure calculation. Accuracy control methods in process (molecular-dynamics) calculation are focused. Flexible control methods are proposed so as to control variational freedoms, automatically at each time step, within the framework of generalized W…
Among the novel chemical and physical attributes of single-wall carbon nanotubes (SWCNTs), the optical properties are perhaps the most compelling. Although much is known about how such characteristics depend on nanotube chirality and diameter, relatively little is known about how the optical response depends on length…
Single-crystalline ceria nanorods have been fabricated by self-assembly of ceria nanocrystals via a simple, low-temperature, and ligand-free approach. Detailed high-resolution transmission electron microscopy shows that the nanorods are formed along the [211] or [110] direction by self-organization of truncated octahe…
A novel method to perform nanoscale mechanical characterization of highly deformable nanofibers has been developed. A microelectromechanical system (MEMS) test platform with an on-chip leaf-spring load cell that was tuned with the aid of a focused ion beam was built for fiber gripping and force measurement and it was…
Dense poly(N-isopropylacrylamide) (PIPAAm) brushes were created on silica bead surfaces by surface-initiated atom transfer radical polymerization (ATRP). Interfacial properties of PIPAAm brushes were characterized by thermoresponisve interaction with biomolecules. The grafted amounts of PIPAAm on silica bead surfaces…