Surface impurities on spherical Au and Cu crystals grown from a drop of melt on graphite in UHV were analyzed by Auger electron spectroscopy after the metals had been cleaned by melting resp. roasting in air. Crystals of Au-Cu alloys grown by the same technique show enrichment of the less abundant component. The well known reconstructions Au(001)(5x20) and Au(l 1 l)(23x 1) could not be detected...

Small cationic Au(n)Cu(m)+ (n + m < or = 6) clusters and their monocarbonyls Au(n)Cu(m)CO+ have been studied by first-principles calculations. The trend for small Au clusters to form planar structures is weaker when some Au atoms are substituted by Cu atoms. A significant odd-even oscillation of the electron affinity of the cationic clusters with the number of their Au or Cu atoms is observed. ...

The elliptic flow v2 is presented for the Cu+Cu collisions at √ sNN = 62.4 and 200 GeV, as a function of pseudorapidity. Comparison to results for the Au+Au collisions at the same energies shows a reduction of about 20% in the flow observed for a centrality selection of 0-40%. The centrality dependent flow, expressed as a function of the number of participants Npart, is compared for the Cu+Cu a...

Vapochromic complexes [Au(im(CH(2)py)(2))(2)(Cu(MeCN)(2))(2)](3+) 1, [Au(im(CH(2)py)(2))(2)(Cu(MeOH))(2)](3+) 2 and [Au(im(CH(2)py)(2))(2)(Cu(H(2)O))(2)](3+) 3 were theoretically investigated. The Au–Cu distances of 1 and 2 (4.631 Å and 2.767 Å, respectively) optimized by the SCS-MP2 method in this work agree with the literature experimental values (4.591 Å and 2.792 Å). Their structural featur...

With the recent high statistics Au+Au and Cu+Cu runs at RHIC, it has become possible to systematically study jet properties in several different colliding systems with potentially different final state interactions. In this talk we present results from high-pT di-hadron and γ-hadron correlations from p+p, d+Au, Cu+Cu, and Au+Au collisions where jets in vacuum, cold nuclear matter, and hot, dens...

A series of coordination polymers containing Cu(II) and [Au(CN)(2)](-) units has been prepared. Most of their structures incorporate attractive gold-gold interactions, thus illustrating that such "aurophilic" interactions can be powerful tools for increasing structural dimensionality in supramolecular systems. [Cu(tren)Au(CN)(2)][Au(CN)(2)] (1, tren = tris(2-ethylamino)amine) forms a cation/ani...

Rezumat Introducere: Datele din literatura de specialitate sugerează existența unei corelații între depresie și diabetul zaharat (DZ) dar relația de cauzalitate nu este înca clarificată. Depresia este asociată cu hiperglicemie și cu un risc crescut de complicații ale diabetului, astfel o ameliorare a depresiei se asociază cu un control mai bun al glicemiei. Obiective: Obiectivul acestui studiu ...

Au, Cu and bimetallic Au-Cu nanoparticles were synthesized on the surface of commercial TiO2 compounds (P25) by reduction of the metal precursors with tetrakis (hydroxymethyl) phosphonium chloride (THPC) (0.5 % in weight). The alloyed structure of Au-Cu NPs was confirmed by HAADF-STEM, EDS, HRTEM and XPS techniques. The photocatalytic properties of the modified TiO2 have been studied for phenol...