Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFacile Synthesis of Well-Defined, Biocompatible Phosphorylcholine-Based Methacrylate Copolymers via Atom Transfer Radical Polymerization at 20 °CEmma J. Lobb, Iris Ma, Norman C. Billingham, Steven P. Armes, and Andrew L. LewisView Author Information School of Chemistry…
Abstract Dendrimer chemistry is one of the most fascinating and rapidly expanding areas of modern chemistry. This review attempts to uncover the appeal of these structurally‐perfect branched macromolecules. The three intriguing regions of a dendritic molecule are discussed: the multifunctional surface, the tailored sa…
One of the motivating questions in materials research today is, how can elements be combined to produce a solid with specified properties? This book is intended to acquaint the reader with established principles of crystallography and cohesive forces that are needed to address the fundamental relationship between the…
Ekatite, ideally (Fe 3+ , Fe 2+ , Zn) 12 (OH) 6 [AsO 3 ] 6 [AsO 3 HOSiO 3 ] 2 , is a new mineral from Tsumeb, Namibia. It is associated with chalcocite and occurs as small sprays of fine needles, up to 2 mm long and less than 0.2 mm in diameter. Ekatite is brownish black, translucent with a brown streak and vitreous l…
Phase separation in blends of bisphenol A polycarbonate and poly(methyl methacrylate), PC/PMMA, is investigated on the microscopic scale by means of atomic force microscopy (AFM). This technique allows the visualization of the early stages of phase separation with greater accuracy, relative to optical techniques. In c…
We show the existence of fragile-to-strong transitions in kinetically constrained systems by studying the equilibrium and out-of-equilibrium dynamics of a generic constrained Ising spin chain that interpolates between the symmetric and fully asymmetric cases. We find that for large but finite asymmetry the model displ…
We compute the tunneling density of states of doped multiwall nanotubes including disorder and electron-electron interactions. A nonconventional Coulomb blockade reflecting nonperturbative Altshuler-Aronov-Lee power-law zero-bias anomalies is found, in accordance with recent experimental results. The presence of a bou…
Abstract The novel polymer modification method based on the activation of an aliphatic polyester chain by using lithium diisopropylamide at low temperature to form a polycarbanion bearing nucleophilic sites in a position α to the carbonyl groups was applied to rac ‐poly (lactic acid), PLA 50 , to label this polymer wi…
Electrochemical and spectroelectrochemical studies were conducted on thin films of poly- tris(4-vinyl-4‘-methyl-2,2‘-bipyridine)ruthenium(II) which were formed by electrochemical reductive-polymerization. These homopolymer films undergo a process whereby redox charge is trapped in the film when the potential is scanne…
The crystal structure of pillaite, a recently described Pb-Sb oxy-chloro-sulfosalt from the Buca della Vena mine, Tuscany (Italy), was solved and refined to a residual R of 0.045 in the monoclinic system, with space group C2/m, and a = 49.49(1), b = 4.1259(8), c = 21.828(4) A, β = 99.62(3) 0 , V = 4394(2) A3. The stru…
Proteins evolved in nature can form precise structures exhibiting nanometer-length-scale features that have great potential for industrial application. However, many of these applications remain unrealized because of limitations in combinatorial and directed evolutionary approaches. An alternative approach that might…
Measurement of space-charge distributions in solid insulators under rapidly varying voltage using the high-voltage, high-speed pulsed electro-acoustic (PEA) apparatus, A See, J C Fothergill, L A Dissado, J M Alison
The crystal structure of synthetic damaraite, Pb 3 O 2 (OH)Cl (orthorhombic, Pmc2 1 , a = 5.8052(7), b = 6.9025(8), c = 15.141(2) A, V = 606.7(1) A 3 has been solved by direct methods and refined to R1 = 0.039. The crystal structure of synthetic mendipite, Pb 3 O 2 Cl 2 (orthorhombic, Pnma, a = 11.879(7), b = 5.808(4)…
Resonant x-ray scattering has been used to investigate the interlayer ordering of the antiferroelectric and ferrielectric smectic C* subphases in a device geometry. The liquid crystalline materials studied contain a selenium atom and the experiments were carried out at the selenium K edge allowing x-ray transmission t…
The Army Research Office (ARO) has been supporting projects focusing on basic research in the area of smart materials and adaptive structures over recent years. A major emphasis of the ARO's Structures and Dynamics Program has been on the theoretical, computational, and experimental analysis of smart structures and st…
Organic coatings are widely used to protect metal surfaces from corrosion. The effectiveness of such coatings is dependent not only on the properties of the coatings, which are related to the polymeric network and possible flaws in this network, but also on the character of the metal substrate, the surface pretreatmen…
Spin-resolved photoemission measurements from polycrystalline NiMnSb films reveal spin-resolved density of states which are in qualitative agreement with local spin density functional band structure calculations [Phys. Rev. B 51, 10 436 (1995)]. The polarization of electrons close to the Fermi level is however found t…
A relationship between the dimensionless thermoelectric figure of merit, ZT , and the ratio of the open-circuit temperature difference, Δ T o , and the short-circuit temperature difference, Δ T s , is reported. Equivalent relationship between ZT and the open circuit voltage, V o , and short-circuit current, I s , are…
Organocobalt derivatives of tetracationic water-soluble porphyrins are difficult to prepare via the typical reductive alkylation of the Co(II)(por) (porH(2) = porphyrin ligand). None have been reported. The problem may arise because the porphyrin core is made relatively electron poor by the positively charged peripher…
Hurricane damage inflicted upon coastal structures, particularly residential structures, results in millions of dollars in financial damage and loss of life each year. A major cause of this damage usually begins with roof uplifts of coastal structures; prevention of roof uplift helps mitigate damage to coastal structu…