Materials Literature
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Nanostructures including nanohole and metal dot arrays were fabricated by hybrid processes combing self-assembled diblock copolymer and conventional semiconductor processes. The interfacial energy between polystyrene-b-polymethylmetacrylate (PS-b-PMMA) diblock copolymer and substrate surface was controlled by employin…
The use and commercial potential of engineered nanomaterials is increasing, but questions of occupational and public health safety remain. Here, we review research published in 2007 concerning toxicology of nanomaterials. Articles were selected from the Medline Pubmed database, published or pre-published during 2007,…
The structure of a self-assembled system containing a protonated dipyrromethene with deprotonated/reduced dichlorodicyanoquinone (DDQ) was determined by X-ray diffraction analysis. The assembly exhibits a highly hydrogen-bonded structure, with an unusual asymmetric conformation for the dipyrromethene.
Lithium ferrite was prepared by the thermal decomposition of three polynuclear complex compounds containing as ligands the anions of malic, tartaric and gluconic acid: (NH4)2[Fe2.5Li0.5(C4H4O5)3(OH)4(H2O)2]?4H2O (I), (NH4)6[Fe2.5Li0.5(C4H4O6)3(OH)8]?2H2O (II) and (NH4)2[Fe2.5Li0.5(C6H11O7)3(OH)7] (III). The polynuclea…
Micro- and mesoporous materials molecular sieves have been synthesized at neutral pH and room temperature using a mimic of “silicatein” for mobilizing the silica. This methodology allows preparing molecular sieves materials in where less stable molecules can be encapsulated, leading to a final material with potential…
Photochromic dendrimer diarylethenes with a C-2-connected bisbenzothienylethene core were synthesized; the most notable feature of them is the strong memory effect of cyclizable conformation of the open form when generated from the closed form by visible light irradiation in polycarbonate films.
Fe thin films were prepared on MgO(100), MgO(110), and MgO(111) substrates by UHV-MBE. The film growth structure and the magnetic properties were investigated. In-situ RHEED observation showed that epitaxial Fe thin film with the (100)bcc, (211)bcc, and (110)bcc planes parallel to the substrate surface grew on respect…
Nephrogenic systemic fibrosis (NSF) is a rare, idiopathic systemic fibrosing disorder that is predominantly characterized by a clinicopathologically distinct symmetric dermopathy and debilitating joint contractures. The condition affects patients with renal insufficiency and appears to show improvement with prompt res…
A series of novel digold complexes incorporating ethynyl pyridine derivatives as a spacer unit, [(R(3)P)Au(C[triple bond]C)X(C[triple bond]C)Au(PR(3))] (R = Ph, X = 2,5-pyridine (1); R = Cy (cyclohexane), X = 2,5-pyridine (2); R = Ph, X = 2,6-pyridine (3); R = Ph, X = 2,5'-bipyridine (4); R = Ph, X = 2,6'-bipyridine (…
The Pt(ii) dithiolene complex of a tetrathiafulvalene diphosphine ligand exhibits two reversible redox systems at close potentials, localized on the weakly interacting TTF (tetrathiafulvalene) and Pt(dmit) moieties.
The velocity and pressure profiles in the electrolyte due to a rotating disk electrode are determined by solving the two-dimensional (2D) Navier–Stokes equations employing axial symmetry. Most applications in the literature employ a one-term approximation of the series solution to von Kármán's one-dimensional (1D) mod…
Technologically-relevant levels of Ge can be incorporated into cell wall silica of the diatom Thalassiosira pseudonana with no aberration in structure at low levels, whereas higher levels alter structure.
The growth process of nanotube films formed on Ti by anodization in electrolytes has been studied by electrochemical measurements, field emission–scanning electron microscopy (FE-SEM) observations, and ellipsometric analyses. The results of electrochemical measurements and FE-SEM observations showed that the change in…
Metal-organic sub-50 nm spherical particles that exhibit single-molecule magnet behaviour have been fabricated by direct precipitation of Mn(12)O(12) clusters in a mixture of acetonitrile and toluene.
The UV-visible spectrum of free-base octaethylcorrole, (OECor) H 3 , was recorded in thirteen different nonaqueous solvents as well as in a mixed acetonitrile/acid solvent containing one of seven different acids. Spectra were also measured in seven different solutions of neat concentrated acid and in CH 3 CN containin…
In this paper, the different aggregation modes of a water-insoluble porphyrin (EHO) mixed with an amphiphilic calix[8]arene (C8A), at the air-water interface and in Langmuir-Blodgett (LB) film form, are analyzed as a function of the mixed composition. The strategy used to control the EHO aggregation has consisted of p…
The reaction of AsCl3 with H2L (where L = a rigid dithiolate) results in the self-assembly of As2L2Cl2 supramolecular macrocycles. For ligands 4,4'-bis(mercaptomethyl)biphenyl (H2), 4,4'-bis(mercaptomethyl)-trans-stilbene (H2), and 1,4-dimethoxy-2,5-bis(mercaptomethyl)benzene (H2), the macrocyclic cavities of the resu…
A conceptual design of the thermoelectric power conversion system combined with open rack type LNG (liquefied natural gas) vaporizer to make use of cold heat of LNG is presented. The system performance analysis has been made based on the thermoelectric module performance data obtained at the cryogenic thermoelectric (…
Nanoindentation is a promising technique for deducing the elastic property of carbon nanotubes (CNTs). The paper presents an atomistic study on the nanoindentation mechanisms of single‐walled and multiwalled CNTs and CNT clusters, through which the deformation characteristics are linked with CNT elastic stiffness. The…
Nickel-coated carbon fiber ( NiCCF ) material is of interest to a number of important industry sectors. The present paper reports a complex study of the corrosion performance of 12K (12,000 single filaments) NiCCF composite tows. The corrosion behavior of this material was examined in dilute H 2 SO 4 , Cl − -based neu…