Materials Literature
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Despite concerns over toxicity, carbon nanotubes have been extensively investigated for potential applications in nanomedicine because of their small size, unique properties, and ability to carry cargo such as small molecules and nucleic acids. Herein, we show that polymer nanotubes can be synthesized quickly and easi…
Summary A new series of silver nanoparticles doped poly (aniline‐co‐4‐fluoroaniline) nanocomposites was synthesized by chemical oxidative in‐situ polymerization method. The characterization of these nanocomposites was carried out by using FTIR, UV‐visible spectroscopy, X‐ray diffraction (XRD), Scanning Electron Micros…
The rheological properties of microliter sized drops of polymer solutions were investigated using measurements of their mechanical vibrational response. Drops were suspended on superamphiphobic substrates and vibrated by the application of a short mechanical impulse. Surface vibrations were monitored by refracting las…
Abstract An electron rich conjugated microporous polymer (CMP) was prepared after reacting a dithienothiophene (DTT) derivative and benzene as co‐monomers by Suzuki‐Miyaura polycondensation. Gas sorption measurements revealed a Brunauer–Emmett–Teller (BET) surface area of 421 m 2 g −1 for the network. Its chemical oxi…
In this note, the density functional theory for chiral nematic liquid crystals is expressed in terms of rotational invariant expansion coefficients of the pair-excluded area at fixed separation. This modification from the standard approach, without making any additional assumptions, yields a more efficient procedure f…
Using the classical theory of invariants for the specific class of graphene's symmetry, we constitutively characterize electro-magneto-mechanical interactions of graphene at continuum level. Graphene's energy depends on five arguments: the Finger strain tensor, the curvature tensor, the shift vector, the effective ele…
This study evaluates the influence of the structural changes promoted by a solution heat treatment (ST) on recrystallization and grain growth during annealing of the 3105 Al alloy subject to asymmetric rolling. Optical Microscopy, Scanning Electron Microscopy (SEM)/X-Ray Energy Dispersive Spectroscopy (EDS), X-Ray Dif…
We investigated the influence of particle size on the microstructure and magnetocaloric effect of Fe-based alloy powders (11 μm to 100 μm in diameter). The degree of structure order varies with the powder size. The 11 μm to 18 μm powders show the largest peak magnetic entropy change (MEC). Increasing the degree of str…
Abstract This paper reports on the synthesis of Tm 3+ /Yb 3+ co-doped SiO 2 –Ta 2 O 5 nanocomposites prepared by a sol–gel route. XRD analysis revealed initial crystallization of the L-Ta 2 O 5 structure dispersed in the silica host, which depended on lanthanide concentration. Vibrational spectroscopy showed low OH gr…
Coupling agents are a special category of chemicals used to impart interactions between filler and polymer in polymer industry. Applicability of natural polymers (NPs) as coupling agents for silica filled Carboxylated Actrilonitrile Butadiene rubber (XNBR) latex is evaluated. Cellulose, Gelatin Chitin and Chitosan wer…
In order to investigate the ice flashover performance and characterization parameter of composite insulators, numerical calculation was applied to simulate the icicle growth and make comparison with different structures. It was found that the number of booster sheds existed an optimized range and saturated icicle brid…
Thin ferroelectric Ba x Sr1–x TiO3 (BST) layers have been grown for the first time on semi-insulating silicon carbide substrates by RF magnetron sputtering of a ceramic target without using buffer sublayers. Results of investigation of the structure of obtained BST films and the electrical properties of related planar…
The influence of a single nanosecond laser pulse on the morphology of an island silver film was studied. It is shown that, during the pulse time span, the islands can change their shape from an arbitrary one to nearly spheroidal. The islands change their shape due to diffusion of silver atoms on the islands’ surface (…
A method is advanced for preparing gold nanoparticles (NPs) at 50°C in aqueous acrylamide (AAm), which has the dual function of a reducing agent for HAuCl4 and a protective ligand for NPs. Nanoparticles have gold cores with the average size d Au = 20.9 ± 3.6 nm. The growth kinetics of NPs has been studied. Films of NP…
The magnetorefractive effect (MRE) in manganites has been studied within the effective medium theory. The MRE has been calculated in manganites La1–x K x MnO3 (x = 0.1 and 0.15) for light transmission and reflection. Good agreement with experimental results demonstrates direct relation of the MRE to the magnetoresista…
Transparent oxyflouride glass ceramics composed of SiO2-Al2O3-Na2O-NaF-YF3 tri-coped with Nd3+/Yb3+/Ho3+ were prepared by thermal treatment. Segregation of NaYF4 nanocrystals in the matrix was confirmed from structural analysis by means of X-ray diffraction and transmission electron microscopy. Compared with glass sam…
The volume oscillation of a cylindrical bubble in a microfluidic channel with planar elastic walls is studied. Analytical solutions are found for the bulk scattered wave propagating in the fluid gap and the surface waves of Lamb-type propagating at the fluid–solid interfaces. This type of surface wave has not yet been…
Abstract Two tetranuclear clusters of formula [ M 4 L 4 (HOMe) 4 ] {H 2 L = ( E )‐1‐[(2‐(hydroxymethyl)phenylimino)methyl]naphthalen‐2‐ol} [ M = Co ( 1 ), Ni ( 2 )] were hydrothermally synthesized by reaction of M (OAc) 2 · 4H 2 O with H 2 L and NaOH in MeOH. X‐ray crystal structure analysis revealed that complexes 1…
La0.67Sr0.33MnO3 (LSMO) thin films were deposited on (001)SrTiO3(STO) and n-type doped Nb:SrTiO3(NSTO) single crystal substrates respectively. The metal to insulator transition temperature(TMI) of LSMO film on NSTO is lower than that on STO, and the TMI of LSMO can be tuned by changing the applied current in the LSMO/…
The Er3+-Yb3+-Li+ codoped TiO2 phosphors have been prepared by sol-gel method. The green and red upconversion emissions were observed under a 976 nm laser diode excitation, which were ascribed to 2H11/2 --> 4I15/2, 4S3/2(I)/4S3/2(II) -->4I15/2, and 4F9/2(I)/4F9/2(II) -->4I15/2 transitions of Er3+ Stark sublevels. The…