Search results for "14"
showing 10 items of 9841 documents
Bulk morphologies of polystyrene-block-polybutadiene-block-poly(tert-butyl methacrylate) triblock terpolymers
2015
Abstract The self-assembly of block copolymers in the bulk phase enables the formation of complex nanostructures with sub 100 nm periodicities and long-range order, both relevant for nanotechnology applications. Here, we map the bulk phase behavior of polystyrene-block-polybutadiene-block-poly(tert-butyl methacrylate) (SBT) triblock terpolymers on a series of narrowly distributed polymers with widely different block volume fractions, ϕS, ϕB and ϕT. In dependence of ϕ, we find the lamella–lamella, core-shell cylinder, cylinder-in-lamella and core-shell gyroid morphology, but also a rarely observed cylinder-in-lamella phase. The bulk morphologies are thoroughly characterized by transmission e…
Divide and Protect: Passivating Cu(111) by Cu-(benzotriazole)2
2012
Binding of benzotriazolate anion (BTA) to copper complexes and Cu(111) surface was investigated by density functional theory calculations. [BTACuBTA]1– was found to be a very stable complex that BT...
The redox chemistry of gold with high-valence doped calcium oxide.
2012
Gold assisted oxygen dissociation on a molybdenum-doped CaO(001) surface
2016
Using density functional theory (DFT) calculations, we address the adsorption of O2 and the coadsorption of gold species and oxygen molecules on a Mo-doped CaO(001) surface with 1.25% impurity concentration. With the help of the Born–Haber thermodynamic cycle, the enhanced binding of an oxygen molecule on Ca(Mo)O is attributed to energy gain owing to simultaneous electron transfer from the dopant to the molecule and lattice relaxations. We consider three coadsorption structures for an Au atom and O2 molecule with different Au–O2 distances. The calculations demonstrate that the coadsorption structures take one electron from the dopant and the O–Au–O chain structure is thermodynamically more …
Il significato dell’esistente
2015
Una breve scheda su due progetti. Il primo è il nuovo complesso parrocchiale Spirito Santo a Cefalù, progettato da Luigi Piazza e Domenico Cirrito con Valeria Piazza e inaugurato nel 2014. il secondo è la realizzazione di Marcello Maltese per il borgo rurale Badia (TP).
DOUBLE TRANSVERSE FORAMEN IN INFANTILE CERVICAL VERTEBRAE OF THE LATE 17TH AND EARLY 18TH CENTURIES. Doble foramen transverso en las vértebras infant…
2016
La presencia de doble foramen transverso es una variante anatómica que se observa con frecuencia en el raquis cervical inferior y que presenta implicaciones clínicas en relación con la arteria vertebral. Aunque en la actualidad existe cierta controversia acerca de si el origen de esta variante cervical es congénito o adquirido, y a pesar de que la presencia de doble foramen transverso en población infantil descartaría un origen degenerativo-artrósico, se encuentra una falta de información acerca de su presencia en vértebras cervicales infantiles. En este sentido, nuestro objetivo ha sido analizar la presencia de doble foramen transverso en vértebras cervicales infantiles procedentes de rest…
Orientation-Dependent Handedness of Chiral Plasmons on Nanosphere Dimers: How to Turn a Right Hand into a Left Hand
2016
Optical activity, which is used as a discriminator of chiral enantiomers, is demonstrated to be orientation dependent on individual, and nominally achiral, plasmonic nanosphere dimers. Through measurements of their giant Raman optical activity, we demonstrate that L/R-handed enantiomers can be continuously turned into their R/L-handed mirror images without passing through an achiral state. The primitive uniaxial multipolar response, with demonstrable broken parity and time reversal symmetry, reproduces the observations as resonant Raman scattering on plasmons that carry angular momentum. The analysis underscores that chirality does not have a quantitative continuous measure and recognizes t…
CCDC 2057854: Experimental Crystal Structure Determination
2021
Related Article: Todd N. Poe, Maria J. Beltra��n-Leiva, Cristian Celis-Barros, William L. Nelson, Joseph M. Sperling, Ryan E. Baumbach, Harry Ramanantoanina, Manfred Speldrich, Thomas E. Albrecht-Scho��nzart|2021|Inorg.Chem.|60|7815|doi:10.1021/acs.inorgchem.1c00300
CCDC 1573804: Experimental Crystal Structure Determination
2017
Related Article: Paul J. Ragogna, Cameron Graham, Clement Millet, Amy N Price, Juuso Valijus, Michael J Cowley, Heikki Tuononen|2017|Chem.-Eur.J.|24|672|doi:10.1002/chem.201704337
INVERSE RELATIONSHIPS BETWEEN CHOROIDAL THICKNESS AND RENAL RESISTANCE INDEX IN HYPERTENSIVE PATIENTS
2019
Introduction: Alterations of the renal microcirculation have been documented in animal models of hypertensive renal damage. Traditionally, the retina has been considered the easiest accessible window to study the systemic microcirculation, even though the choroid is the most important vascular layer of the eye. The introduction in the past few years of advanced optical coherence tomography (OCT) techniques has greatly increased our understanding of the choroid. Although the renal resistive index (RRI) was initially considered to reflect intrarenal vascular pathological processes, this index is actually regarded as the result of complex interaction between renal and systemic vascular wall pr…