Materials Literature
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The microdomain orientation in thin films of cylinder- and lamella-forming diblock copolymers, polystyrene- block -poly(methyl methacrylate) (PS- b -PMMA), was investigated as a function of the film thickness and the composition of random copolymers composed of styrene (S) and methyl methacrylate (MMA), denoted as P(S…
pH-Controlled assembly and disassembly of gold nanorods in both end-to-end and side-by-side fashions are demonstrated using bifunctional molecules that contain a thiol group at one end and a different functional group at the other end (see image). The assembly and disassembly processes are reversible and can be repeat…
We report a new type of multifunctional nanomaterials, FePt@Fe2O3 yolk-shell nanoparticles, that exhibit high cytotoxicity originated from the FePt yolks and strong MR contrast enhancement resulting from the Fe2O3 shells. Encouraged by the recently observed high cytotoxicity of FePt@CoS2 yolk-shell nanoparticles, we u…
First-principles calculations of magnetic and, to a lesser extent, electronic properties of the LaFeAsO-based superconductors show substantial apparent controversy, as opposed to most weakly or strongly correlated materials. Not only do different reports disagree about quantitative values but there is also a schism in…
Nanocrystals exhibit interesting electrical, optical, magnetic, and chemical properties not achieved by their bulk counterparts. Consequently, to fully exploit the potential of nanocrystals, the synthesis of nanocrystals must focus on producing materials with uniform size and shape. Top-down physical processes can pro…
Abstract Corrosion is an important issue for cast Al alloy in an engine cooling system, but how the microstructural features affect the coolant‐related corrosion behaviour is not well understood. In this research, the evolution of corrosion in an ISO 2379 cast Al alloy was studied in an antifreeze radiator coolant und…
The pyrolysis of organometallic clusters containing osmium and/or ruthenium on a silica support leads to metallic nanoparticles in the 1 to 10 nm size range. The particle size obtained is correlated to the ligand set, and there are also indications that the shape of the cluster may have some effect on the shape of the…
Abstract Polyimide (PI) films containing dispersed ZnO nanoparticles were prepared from both zinc nitrate hexahydrate (designated as Zn(NO 3 ) 2 /PI) and ZnO nanoparticles, 2‐nm average primary size (ZnO/PI). This work shows how the origin of ZnO affects both the photoluminescence and thermal decomposition of the film…
Recent development of pseudopotential-based correlation consistent basis sets (cc-pVnZ-PP) by Peterson and Puzzarini [Theor. Chem. Acc. 114, 283 (2005)] has enabled the relative importance of metal versus ligand basis set size to be examined systematically. The impact of basis set choice on geometries and dissociation…
Porous γ-Al 2 O 3 -doped porous ZnO nanocomposites were synthesized by sonochemistry and microwave techniques, and the changes in the pore characteristics as a function of the dopant concentration were investigated. The insertion of γ-Al 2 O 3 or partial and/or total blockage of the pores of porous ZnO by porous γ-Al…
Abstract Blends of low‐density polyethylene (LDPE) and poly(ethylene terephthalate) (PET) were prepared with different weight compositions with a plasticorder at 240°C at a rotor speed of 64 rpm for 10 min. The physicomechanical properties of the prepared blends were investigated with special reference to the effects…
Abstract The aim of the present contribution is to understand how ionic strength, brought by the addition of salt to laponite/PEO nanocomposite dispersions, influences the texture and adhesion characteristics at nano‐ and microscales in multilayered nanocomposite films prepared from such dispersions. At the nano‐scale…
The reaction mechanism for the styrene selective oxidation on the oxygen preadsorbed Au(111) surface has been studied by the density functional theory calculation with the periodic slab model. The calculated results showed that the process of reaction includes two steps: forming the oxametallacycle intermediate (OMME)…
Abstract A conventional vulcanization system containing tetrabutylammonium bis(4‐methylphenyldithiocarbimato)zincate(II) (ZNIBU) was used for curing of natural rubber (NR) compounds. Rheometric ( t s 1 , t 90 , and CRI) and mechanical properties, such as tensile and tear strengths and modulus at 300%, were measured to…
The effects of the block copolymer composition and the solvent selectivity on the micellar morphologies of poly(styrene- b-4-vinylpyridine)s (PS- b-P4VPs) and their functionalizations with gold were studied in 10 mg/mL solutions using small-angle X-ray scattering and transmission electron microscopy (TEM). The solvent…
Self-assembled monolayers of Ag nano particles 7 nm in size, encapsulated by lipid molecules, are fabricated by using a solid-supported liquid-crystalline lipid membrane. By dissolving and reassembling these lipid-encapsulated Ag nanoparticles, various superstructures ranging from 2D planar superlattices and multistac…
The self-assembly and the formation of "Blackberry" type supramolecular structures for a type of Yttrium-containing polyoxometalate (K 15Na 6(H 3O) 9[(PY 2W 10O 38) 4(W 3O 14)].9H 2O, or {P 4Y 8W 43}) macroanions is characterized by using static and dynamic light scattering techniques. {P 4Y 8W 43} macroions are found…
Fluoroalkyl end-capped co-oligomeric nanoparticles, which were prepared by the reaction of fluoroalkanoyl peroxide with 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and 1-hydroxy-5-adamantylacrylate (Ad-HAc), were applied to the preparation of novel fluorinated co-oligomeric nanocomposite-encapsulated gold nanopar…
Poly(divinylbenzene) (PDVB) microspheres with high specific surface area and porosity were prepared via suspension polymerization in the presence of porogens. The effect of porogen type and DVB content on specific surface area and porosity was investigated. The results showed a trend that, as the solubility parameter…
Abstract In order to improve the lifetime of cutting knives in the wood processing industry, a study has been undertaken to find out which wear process is primarily responsible for the reduction of the lifetime of steel blades. The examination of damaged surfaces of the cutting tools reveals mechanical damage at the c…