Materials Literature
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A novel method of thermo-controlled emulsion polymerization has been employed to synthesize spherical polyelectrolyte brushes that consist of a solid polystyrene core and a poly (acrylic acid) (PAA) shell covalently attached on the core surface densely by one end. The growth of brushes from the core surface was monito…
The permittivity and permeability of the Tb-doped and undoped Fe core-shell nanoparticles were investigated for frequencies from 2 to 18 GHz. The particles were synthesized by arc discharge and contain some oxygen, probably in the form of Fe2O3, Fe3O4, and Tb2O3, whereas the core material is Fe. Both the electromagnet…
This study investigates, for the first time, a photoerasable and photorewritable spatially-tunable laser using a dye-doped cholesteric liquid crystal (DDCLC) with a photoisomerizable chiral dopant (AzoM). UV illumination via a photomask with a transmittance-gradient can create a pitch gradient in the cell such that th…
Scaffolds used for tissue engineering are made to mimic natural surroundings of tissues, the extracellular matrix (ECM). The ECM plays a large part in maintaining the structural integrity of the connective tissue. When producing a tissue in the laboratory, structural integrity of the cells is ensured only when a biomi…
Over the past couple of decades, metal-containing polymers (metallopolymers) have gained considerable interest for the creation of functional soft materials with unique and tunable properties. For this purpose, supramolecular chemistry, as demonstrated in Nature, is regarded as the archetype showing the ordered assemb…
A Comment on the Letter by G. Brambilla et al., Phys. Rev. Lett. 102, 085703 (2009). The authors of the Letter offer a Reply.Received 11 May 2009DOI:https://doi.org/10.1103/PhysRevLett.104.169601©2010 American Physical Society
The magnetic behaviour of the compounds containing the [Ru(2)(DPhF)(3)(O(2)CMe)](+) ion (DPhF(-)=N,N'-diphenylformamidinate) shows a strong dependence on the nature of the ligand bonded to the axial position. The new complexes [Ru(2)(DPhF)(3)(O(2)CMe)(OPMe(3))][BF(4)]0.5 CH(2)Cl(2) (1 0.5 CH(2)Cl(2)) and [Ru(2)(DPhF)(…
The structure, stability, energy partition analysis, and charge redistribution of endohedral complexes formed between Au 32 cluster with alkali metal cations, such as Li +, Na +, K +, Rb +, and Cs +, have been investigated using the density functional theory method. All alkali metal cations can be stably encapsulated…
The crystal structure and some magnetic properties were investigated for polycrystalline samples of LaMn1−xFexO3+y, prepared by solid-state reaction in air. All samples show the ORT-2 orthorhombic structure that suppresses the Jahn–Teller distortion and favors a ferromagnetic (FM) superexchange interaction between Mn3…
The interaction of gold particles with a silica surface is investigated using a combination of theoretical and experimental techniques. It is found that the physisorption strength of gold on silica decreases with increasing chloride concentration at the surface, with increasing cluster size, and with decreasing oxidat…
Regenerated bamboo, also known as bamboo viscose, is a man-made cellulose fibre that has recently appeared on the market as an apparel and home-furnishing textile. The products are marketed as having exceptional properties such as superior comfort and hand, as well as antimicrobial properties. Apart from the claimed “…
Salicylurate (SU) is the major metabolite in urine of acetylsalicylic acid (aspirin) and can be used as a metric to monitor aspirin pharmacokinetics and as an indicator of appendicitis, anemia, and liver disease. Detection in urine and plasma currently requires solvent extraction or other sample handling prior to anal…
We report the synthesis of β−Co(OH)2 nanosheets using microwave assisted hydrothermal and conventional chemical reaction methods. A magnetic transition at an onset temperature, T1∼96 K, and a sign of antiferromagnetic state transition at the Néel temperature, TN=9∼10 K, can be determined from M-T curves and M-H curves…
As a "green chemistry" tool, ultrasound irradiation of high intensity was successfully applied to formation of cerium/aluminum oxide anticorrosion protective layers on metal surfaces. The mechanism of metal surface modification in the presence of cerium(III) aqueous solution results from two components: activation of…
A procedure based on microwave-induced combustion (MIC) was applied for carbon nanotube (CNT) digestion and further determination of La and Ni by inductively coupled plasma optical emission spectrometry (ICP OES). Samples (up to 400 mg) were completely combusted at 20 bar of oxygen, and a reflux step was applied to im…
Poly(ethylene terephthalate)-single-walled carbon nanotube (PET-SWNT) nanocomposite fibers have been prepared through melt spinning and drawing. While acting as effective nucleating agents for PET melt crystallization, SWNTs also provide significant reinforcement to PET fibers. For example, the tenacity and initial mo…
Polyelectrolyte multilayer (PEM) thin films prepared using the layer-by-layer technique are proposed as a matrix for the immobilization of 1,7-bis-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-2,5-dione (curcumin), a lipophilic model drug. The PEM assembly was based on the layer-by-layer deposition of cationic poly(diall…
Single-walled carbon nanotube (SWCNT) networks have become a subject of interest due to their ability to support structural, thermal and electrical loadings, but to date their application has been hindered due, in large part, to the inability to model macroscopic responses in an industrial product with any reasonable…
It is known that, in the order-parameter space S2/Z2 (a typical example being a uniaxial nematic liquid crystal in three dimensions), a -1/2 wedge disclination line and a +1/2 one are topologically equivalent and can thus be transformed continuously into each other. Here we report the realization of this transformatio…
A 10-layer hexagonal perovskite Ba 5 Sb 1− x Mn 4+ x O 15−δ solid solution (0.24 ≤ x ≤ 0.36; space group P 6 3 / mmc, a = 5.7095(1) Å, and c = 23.4866(3) Å for x = 0.36) has been synthesized by solid state reaction and studied using powder X-ray and neutron diffraction and magnetization measurements. This 10H polytype…