Materials Literature
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A two dimensional crystalline layer is found at the surface of the liquid eutectic Au$_{82}$Si$_{18}$ alloy above its melting point $T_M=359 ^{\circ}$C. Underlying this crystalline layer we find a layered structure, 6-7 atomic layers thick. This surface layer undergoes a first-order solid-solid phase transition occurr…
Thermoelectric energy conversion technology is attracting great attention for the conversion of waste heat into electricity. For practical thermoelectric applications, the figure of merit for thermoelectric performance ZT needs to be >1. Although heavy-metal-based materials such as Bi2Te3 and PbTe exhibit ZT ∼ 1, they…
In this article we present size dependent spectroscopic observations of nanocolloids of ZnO. ZnO is reported to show two emission bands, an ultraviolet (UV) emission band and another in the green region. Apart from the known band gap 380 nm and impurity 530 nm emissions, we have found some peculiar features in the flu…
The atomic and electronic structure of a set of proposed thin (1.6 nm in diameter) silicon/silica quantum nanodots and nanowires with narrow interface, as well as parent metastable silicon structures (1.2 nm in diameter), was studied in cluster and PBC approaches using B3LYP/6-31G* and PW PP LDA approximations. The to…
Multiferroics, materials combining multiple order parameters, offer an exciting way of coupling phenomena such as electronic and magnetic order. Using epitaxial growth and heteroepitaxy, researchers have grown high-quality thin films and heterostructures of the multiferroic BiFeO3. The ferroelectric and antiferromagne…
High purity of (7,5) SWNTs (approximately 79% of the semisonducting SWNT ensemble) can be obtained by polymer-assisted extraction from the narrow-diameter distributed SWNTs produced by the catalyst Co-MCM-41. The fluorene-based polymers are able to selectively wrap the single-walled carbon nanotubes (SWNTs) with certa…
Carbon nanotubes (CNTs) have been proposed and actively explored as multipurpose innovative carriers for drug delivery and diagnostic applications. Their versatile physicochemical features enable the covalent and noncovalent introduction of several pharmaceutically relevant entities and allow for rational design of no…
Part I Radiation Damage -- 1 The Radiation Damage Event -- 2 The Displacement of Atoms -- 3 The Damage Cascade -- 4 Point Defect Formation and Diffusion -- 5 Radiation-Enhanced and Diffusion Defect Reaction Rate Theory -- Part II Physical Effects of Radiation Damage -- 6 Radiation-Induced Segregation -- 7 Dislocation…
Abstract A series of fluorene‐based luminophores containing methacrylic end groups have been prepared and incorporated into uniaxially oriented liquid crystalline films by in situ photopolymerization. Various structural modifications on the 2‐(4‐cyanophenyl)fluorene core, which include alkyl chains at the 9‐position a…
A Reversible Change of Reflected Light Intensity between Molten and Solidified Ge–Sb–Te Alloy, Kuwahara, Masashi, Endo, Rie, Fukaya, Toshio, Shima, Takayuki, Iwanabe, Yasuhiko, Fons, Paul, Tominaga, Junji, Susa, Masahiro
This paper summarizes the characteristics of chromite ore processing residue (COPR) in terms of their chemical compositions, phases, and recycling potential of iron and chromium through preliminary magnetic separation. COPR from nine hazardous waste sites in Hudson County, N.J., were analyzed using nondestructive inst…
High pressure effects on the crystal structure and magnetic state of ${\mathrm{Pr}}_{0.52}{\mathrm{Sr}}_{0.48}\mathrm{Mn}{\mathrm{O}}_{3}$ manganite up to 31 and $4\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ have been studied by means of the x-ray and neutron powder diffraction, respectively. At ambient pressure, ${\math…
This study demonstrates the feasibility of using weak−strong polyelectrolyte (PE) blend systems for controlling the composition and thickness of core−shell particles and PE blend capsules. PE blend capsules were prepared from silica sphere templates via the stepwise adsorption of poly(allylamine hydrochloride) at pH 7…
The crystal structure of the Ag(36)Li(64) gamma-brass was determined by analyzing the powder diffraction pattern taken using a synchrotron radiation beam with wavelength 0.50226 A. It turned out that the compound contained 52 atoms in its unit cell with the space group I43m and that the Li atom enters exclusively into…
Abstract Complex metal oxides, such as e.g. perovskite‐type phases are developed as potential functional materials to improve the efficiency of thermoelectric converters. Among those, cobaltates with p‐type conductivity and n‐type manganates are considered for the realisation of a ceramic thermoelectric converter. Sin…
Highly (100)‐ and (110)‐oriented LaNiO 3 (LNO) thin films were successfully prepared on a Si (100) substrate using the chemical solution deposition method. It was somewhat surprising to find that the orientation of LNO films depended on the heating rates of the temperature range of 200°–400°C. The samples with heating…
Abstract In this study, a tribranched, phenylethynyl‐terminated aryl ether compound (Tri‐PE‐PAEK) was synthesized. This novel star‐shaped compound exhibits a good combination of properties, such as a low melting temperature (252 °C) and good solubility in aprotic solvents, as well as a low melt viscosity (0.1 P at 280…
The structure of Pb(1-x)Ba(x)Zr(0.65)Ti(0.35)O(3) (PBZT) ceramic materials with 0.00 < or = x < or = 0.40 was studied using synchrotron X-ray powder diffraction data. According to the Rietveld refinements, the structure of PBZT ceramics with x = 0.00, 0.10 and 0.20 at room temperature was rhombohedral R3c. A phase tra…
Alkynylamidinium groups have been introduced at the beta and meso positions of a nickel(II) porphyrin (PNi(II)) framework. The modification permits the distance between the amidinium-amidine acid-base group and porphyrin to be increased while effectively maintaining pi conjugation between the porphyrin macrocycle and…
A new macrocyclic ligand, L3, has been synthesised, based on the cyclen framework grafted with three phenacyl light-harvesting groups and a C5-alkyl chain bearing a carboxylic acid function as a potential linker for biological material. Acidity constants are determined by spectrophotometric titrations, as well as cond…