Materials Literature
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Here we show that hierarchical structures based on one-dimensional filaments such as carbon nanotubes lead to superior thermal management networks, capable of effectively mitigating high-density ultrasmall nanoscale heat sources through volumetric heat sinks at micrometer and larger scales. The figure of merit of heat…
Cadmium selenide (CdSe) quantum dots were prepared in high-temperature water via a rapid hot-injection method intended to mimic conventional synthesis in organic solvents. The nanocrystals were smaller than those previously produced hydrothermally under nonisothermal conditions when using the same process parameters.…
Mesomorphic structure formation of hydrogen-bonded complexes of amino substituted 1,3,5-triazines with complementary (semiperfluoro)alkoxybenzoic acids is presented. The substitution pattern of both components was modified systematically in order to elucidate the influence of molecular parameters on the mesophase morp…
A simple method was developed for the reversible and selective modification of metallic and large diameter semiconducting SWCNTs in [BMIM]PF(6) ionic liquids by adding certain anion surfactants. The electronic band structure of SWCNTs can be controlled and tuned over a range by varying the surfactants used and their c…
Nanosized multilayered silica vesicles have been synthesized through a dual-template way by using cetyltrimethylammonium bromide (CTAB) and C 3 F 7 O(CFCF 3 CF 2 O) 2 CFCF 3 CONH(CH 2 ) 3 N + (C 2 H 5 ) 2 CH 3 I − (FC-4) as the cotemplates and tetraethyl orthosilicate (TEOS) as the siliceous precursor. According to tr…
The microphase separation of diblock copolymers synthesized by reversible addition−fragmentation chain transfer (RAFT) polymerization, containing one monodisperse block (poly(methyl methacrylate), PMMA) and one polydisperse block (poly(butyl acrylate), PBA), was investigated in thin films (<100 nm). The formation of o…
The low-temperature behavior of proteins under high pressure is not as extensively investigated as that at ambient pressure. In this paper, we study the dynamics of a hydrated protein under moderately high pressures at low temperatures using the quasielastic neutron scattering method. We show that when applying pressu…
Utilization of waste tire rubber in the manufacture of particleboard was investigated, using the same method as that used in the wood-based panel industry. The manufacturing parameters were: a specific gravity of 0.65 and waste tire rubber content (10/90, 20/80, and 30/70 by wt% of waste tire rubber/wood particle). Tw…
The sign-reversing fully gapped superconducting state, which is expected to be realized in oxypnictide superconductors, can be prominently affected by nonmagnetic impurities due to the interband scattering of Cooper pairs. We study this problem based on the isotropic two-band BCS model: in oxypnictide superconductors,…
The thermal decomposition of 5-aminotetrazole was studied theoretically using the G3 multilevel procedure and DFT B3LYP technique. The unimolecular primary decomposition reactions of the three most stable isomers of 5-ATZ were studied in the gas phase and in the melt using a simplified model of the latter. The influen…
Cotton fibre has played an important role in textile materials since ancient times and it is still widely used in the modern textile industry for its high quality. Superfine cotton powders have been produced from cotton fibres by special pretreatment with the aid of specially designed machines and technology. Such sup…
This study investigates the possible adsorption configurations and dissociative reactions of NH 3 on the anatase (101) surface by employing the first principles calculations. In addition, the hydroxyl group effect is also included to study how this effect influences the adsorption and the dissociative reactions. Witho…
Abstract With the ever increasing demand for fuel savings on vehicles, there is a strong push to replace metal with polymeric + fiber (carbon/glass) composites. However, the replacement of metal with polymeric composites can lead to additional fire risk. Our study focused on glass fiber reinforced polymer composites m…
We demonstrated optical amplification at 1550 nm with a carbon tetrachloride solution of Er(3+)-Yb(3+) codoped NaYF(4) nanocubes synthesized with solvo-thermal route. Upon excitation with a 980 nm laser diode, the nanocube solution exhibited strong near-infrared emission by the (4)I(13/2)-->(4)I(15/2) transition of Er…
Hydrocarbon and fluorocarbon surfactants show highly nonideal mixing that under some conditions results in demixing of the two types of surfactants into distinct populations of fluorocarbon-rich and hydrocarbon-rich aggregates. This also occurs in materials prepared by cooperative assembly of hydrolyzed tetraethoxysil…
An experimental study of oxidation of micrometer-sized aluminum powder in CO 2 and CO 2 /O 2 mixed oxidizers is described. The oxidation is studied using thermogravimetric (TG) measurements. Partially oxidized samples are recovered and their compositions are analyzed using X-ray diffraction. Oxidation of aluminum powd…
Axial deformation of boron nitride nanotubes (BNNTs) induced by an external electric field is studied by density functional theory. It is found that the field-induced deformation can reach 1% at a field strength of around 10 V nm −1 due to both the converse piezoelectric effect and the electrostrictive effect. This de…
The magnetic properties of (10,0) finite-sized single-walled carbon nanotubes (SWNTs) have been investigated by use of density-functional theory. A comparative study on the impact of different nanotube terminating structures on the magnetic states of these systems is presented. Three termination modes are included: hy…
Within the framework of medical diagnosis, the main objective is the development of hydrophilic magnetic particles for the generic capture of the nucleic acids in order to enhance the sensitivity. The strategy used in this work is based on the synthesis of cationic and hydrophilic magnetic nanoparticles bearing aminod…
Inorganic−organic hybrid nanocomposite sols were prepared using tetraethyl orthosilicate (TEOS), 3-(glycidoxypropyl)trimethoxysilane (GLYMO), n -butanol, water, methanol, and catalytic amounts of HCl and Al(acac) 3 . Hydrolysis−condensation reactions of TEOS at pH ≈ 1.3 generates silica nanoparticles in the sol that r…