Materials Literature
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The phase diagram for the cubic BNC ternary system in a heterodiamond structure was examined by Monte Carlo simulations and the cluster expansion technique based on first-principles calculations. All the atomic arrangements exhibit positive formation energies, indicating phase separation into cubic BN $(c\text{\ensure…
Based on the molecular structure mechanics method, the dynamic properties of super carbon nanotubes (STs), together with ST-based mass and strain sensors, are investigated. The following results are obtained: (a) the fundamental frequency of the STs is found to be lower than that of the single-wall carbon nanotube (SW…
We investigated the densification of undoped, nanocrystalline yttria (Y 2 O 3 ) powder by spark plasma sintering (SPS) at sintering temperatures between 650°C and 1050°C at a heating rate of 10°C/min and an applied stress of 83 MPa. In spite of the low sinterability of the undoped Y 2 O 3 , a remarkable densification…
Surface modification of silica particles by an amphiphilic poly(amido amine) (PAMAM) dendron and investigation of their advanced application toward water purification have been demonstrated. The amphiphilic dendron-surface-modified silica particles (C18GnS, n = 1−3) were prepared by solid-phase synthetic strategy incl…
Crystal clear: Strong supramolecular interactions between tris(dipicolinate)lanthanide complexes and arginine-like moieties have been evidenced by NMR chemical shift titration and X-ray diffraction analyses. Since the lanthanide atom is a strong anomalous scatterer, and the complex itself is luminescent, this interact…
The hydrogen storage in zeolite-like hexacyanometalates with different exchangeable alkali metals within the cavities was studied. The H 2 adsorption isotherms were recorded at 75 and 85 K in order to estimate the involved adsorption heats using the isosteric method. The electric field gradient within the porous frame…
This study focuses on the formation mechanism of the bicontinuous cubic Ia 3̅ d mesoporous material KIT-6, both on the molecular and on the mesoscopic levels. KIT-6 is synthesized with Pluronic P123 (PEO 20 PPO 70 PEO 20 ), low acid concentration, and n -butanol at 40 °C. Through in situ EPR measurements on a series o…
Electron paramagnetic resonance and electron-nuclear double resonance (ENDOR) experiments on ZnO nanoparticles doped with Al reveal the presence of shallow, effective-masslike donors related to substitutional Al atoms. The shallow character of the Al donor is evidenced by the multitude of ENDOR transitions of the $^{6…
We present a generalization of the self-consistent analysis of carbon nanotube (CNT) field effect transistors (FETs) to the case of multi-wall/multi-band coherent carrier transport. The contribution to charge diffusion, due to different walls and sub-bands of a multi-wall (mw) CNT is shown to be non-negligible, especi…
Abstract Nylon‐6/Attapulgite (ATP) composites were prepared by melt blending in a twin screw extruder. Nylon‐6/ATP composites were tested for its mechanical, rheological, thermal and morphological properties. The results have shown drastic improvement in the flexural modulus by 74% at the loading level of 4% of ATP. T…
Experimental and theoretical simulations of linear and nonlinear optical susceptibilities of the novel Na3La9O3(BO3)8, a ternary oxyborate nonlinear single crystal, are reported here. The calculations were based on one of the most accurate methods for the computation of the linear and nonlinear optical susceptibilitie…
Corrosion behavior of ZrB 2 powder during wet processing in water or ethyl alcohol was studied both with and without an organic additive. Incorporation of oxygen and pH change did not intensively occur during static aging of aqueous slurries, but corrosion was enhanced when stirring the slurries. The oxygen content of…
Abstract PET‐glass fiber composites were prepared by melt mixing of recycled PET with chopped glass fibers (15, 20, and 30 wt%) and their degree of dispersion was assessed by scanning electron microscopy. Rotational rheometry was employed to analyze the interfacial shear strength between the fibers and polymer matrix…
Abstract Well‐defined six‐armed star poly( L ‐lactic acid) (PLLA) with a triphenylene core has been prepared by ring‐opening polymerization of L ‐lactide. As a result of strong π – π interactions between the triphenylene core and the multi‐walled carbon nanotubes (MWCNTs), the polymer was conveniently immobilized on t…
Abstract A simple method to obtain novel nanofibers composed of polyelectrolyte complexes (PECs) has been proposed. It consists of the electrospinning of a mixed homogeneous solution of polyelectrolyte partners, and the formation of PEC during the electrospinning. This was achieved by careful choice of the composition…
Abstract This paper describes the mechanical and thermal characterisation of cross‐linked glycidyl azide polymer (GAP) and GAP–hydroxyl terminated polybutadiene (HTPB) networks. Cross‐linked GAP and GAP–HTPB networks were prepared by reacting GAP diol and GAP–HTPB diol mixture with different diisocyanates. The physica…
Abstract Two new, fully conjugated polymeric cyanine dyes based on trimethine and heptamethine moieties have been synthesized. Both polymers were characterized by gel permeation chromatography, UV‐vis and IR spectroscopy, elementary analysis and cyclic voltammetry. The structure of one material could be confirmed with…
New metallo-nanostructured materials of carbon nanohorns (CNHs), within the family of elongated carbon nanotubes, have been prepared by the coordination of copper(II)-2,2':6',2' '-terpyridine (Cu(II)tpy) with oxidized carbon nanohorns (CNHs-COOH). The resulted CNHs-COO-Cu(II)tpy metallo-nanocomplexes have been charact…
Acoustic measurements using synchrotron radiation have been performed on glassy GeSe2 up to pressures of 9.6 GPa. A minimum observed in the shear-wave velocity, associated anomalous behavior in Poisson's ratio, and discontinuities in elastic moduli at 4 GPa are indicative of a gradual structural transition in the glas…
Abstract PVP solutions were sonicated with high‐intensity ultrasound, and the weight‐average molecular weight was monitored by an ACOMP system. The use of continuous on‐line data to critically evaluate various models showed that the molecular weight decreased towards a limiting value. Theoretical and phenomenological…