Materials Literature
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Abstract The effects of SP on the crystallization and dielectric properties of PEG and PE‐ b ‐PEG are studied. POM, SEM, DSC, FTIR, and dielectric spectroscopy are used to analyze the interaction between PEG and SP. The results indicate that the involvement of the nonpolar hydrophobic PE block improves the compatibili…
Quasi-tetragonal BiFeO3 (T-BFO) multiferroic oxide is receiving much attention due to prospects of enhanced ferroelectric polarization and close-to-room-temperature phase transitions. Here, we report on the role of deposition temperature on the stabilization of the T-BFO phase on LaAlO3(001) substrates. T-BFO has only…
Vertically aligned carbon nanotube’s extreme compliance and mechanical energy absorption/dissipation capabilities are potentially promising aspects of their multi-functionality. Mathematical models have revealed that a hardening-softening-hardening material relation can capture the unique sequential, periodic buckling…
We investigate the assembly of spherical and anisotropic colloidal particles with the shape of peanuts when subjected to an external alternating electric field. By varying the strength and frequency of the applied field, we observe that both types of particles form clusters at low frequencies due to attractive electro…
Two magnetic nanocomposites were prepared from nanocrystalline zinc oxide doped with different concentrations of iron oxide (5 and 10 wt. %). X-ray diffraction and scanning electron microscopy have shown the growth of ZnFe2O4 nanocrystallites with size below 10 nm within the ZnO matrix in a highly agglomerated structu…
The Eu 3+ ‐doped novel precursor glass in the K 2 O – SiO 2 – SrO – Bi 2 O 3 – Ta 2 O 5 system was prepared using the melt‐quench technique. The transparent SrBi 2 Ta 2 O 9 ( SBT ) glass‐ceramic nanocomposites were derived from this glass using a controlled crystallization process. The formation of SBT crystal phase,…
In the present work, antireflective sub-wavelength structures have been fabricated on fluorescent 6H-SiC to enhance the white light extraction efficiency by using the reactive-ion etching method. Broadband and omnidirectional antireflection characteristics show that 6H-SiC with antireflective sub-wavelength structures…
Successful growth of diamond by chemical vapor deposition requires that chemisorbed hydrocarbon species, most notably CH 2 groups, are able to migrate on the growing surface. Quantum mechanical and hybrid quantum mechanical/molecular mechanical (QM/MM) cluster models are here used to investigate the energetics of CH 2…
A direct observation of exciton diffusion in isotopically engineered 12C/13C diamond junctions is presented. Excitons generated under a focused electron beam in the higher-energy bandgap 13C diamond diffuse and part of them are collected in the lower-energy bandgap 12C diamond, where they recombine. By using cathodolu…
Climatic conditions of the territory where the road is located (air temperature, solar radiation) influence the “work” of asphalt concrete pavements. The influence causes shear deformations at high positive temperatures and the occurrence of cracks at low negative temperatures. In the late 80s, in the USA the asphalt…
Graft copolymerization of Grewia optiva fiber with acrylic acid (AAc) was carried out by using a Ce(IV) redox initiator under two different conditions, i.e. in air and under the influence of microwave radiation. Different reaction conditions affecting grafting percentage (Pg) for both methods were optimized and compar…
We present the results of million-atom electronic quantum transport calculations for graphene nanoconstrictions with edges that are smooth apart from atomic-scale steps. We find conductances quantized in integer multiples of $2{e}^{2}/h$ and a plateau at $\ensuremath{\sim}$$0.5\ifmmode\times\else\texttimes\fi{}2{e}^{2…
A simple, new approach to localizing electrospun nanofiber scaffolds simply by direct writing of SU-8 photoresist followed by UV polymerization is presented. This method allows 3D cell culture arrays to be produced and it can be integrated with microfluidic devices easily to enable low-cost high-throughput cellular as…
Abstract We report here the results from theoretical calculations of the potential energy curves for three dimers of lithium phthalocyanine (LiPc) using nine types of functionals: the M06‐2x, M06L, B97D, ωB97, ωB97X, ωB97XD, CAM‐B3LYP, LC‐ωPBE, and LC‐BLYP. The results were discussed in comparison with those obtained…
The cavitation bubble structures for the stationary specimen method were clarified for various distances, h, between the stationary specimen and the horn-tip surface. The generated cavitation bubbles constituted a huge number of tiny bubbles and bubble clusters of different sizes. The maximum cluster size was 1.4 mm.…
Vertically aligned ZnO single-crystal nanotube/nanorod array films have been concurrently fabricated, respectively, on the top and bottom surfaces of a zinc foil substrate by a facile vapor-phase hydrothermal method, due to the unique vapor-phase reaction environment (see figure).
A superhydrophobic graphite surface has been fabricated through two facile physical steps, peeling and ultrasonicating. Peeling yields micron-scale roughening, and thus a highly hydrophobic surface is obtained. Further ultrasonicating results in a superhydrophobic surface with nanostructure embedded in microstructure.…
To enhance the reaction rate of solid state polycondensation (SSP) of poly( l -lactic acid) (PLLA) and thus to prepare high molecular weight PLLA by SSP in a short time, the effects of precrystallization as well as SSP temperature ( T s ) on the SSP of PLLA were investigated. It was found that precrystallization at lo…
A 3-silolene derivative, 2,2,5,5-tetrakis(dimethylsilyl)-1,1-dimethyl-3,4-diphenyl-3-silolene (TDMSHS), is first synthesized and characterized by X-ray diffraction crystallography and spectroscopic methods. Hydrosilylation polymerization of TDMSHS with 1,1-dimethyl-2,5-bis(4-ethynylphenyl)-3,4-diphenylsilole in the pr…
Crisscrossed Eu3+-doped Y(OH)3nanotubes spin cast on the front surface of the screen-printed monocrystalline silicon solar cells (SPMSSCs) have been fabricated to enhance the conversion efficiency (CE) of the SPMSSCs. Organic-solvent-dispersible Eu3+-doped Y(OH)3nanotubes were hydrothermally synthesized according to t…