We report the first detailed chemical abundances for 5 globular clusters (GCs) in M31 from highresolution (R ∼ 25,000) spectroscopy of their integrated light. These GCs are the first in a larger set of clusters observed as part of an ongoing project to study the formation history of M31 and its globular cluster population. The data presented here were obtained with the HIRES echelle spectrograp...

In a series of recent experiments, the HOMO-LUMO energy gaps of small Si clusters deposited on a graphite substrate have been determined by Scanning Tunneling Microscopy (STM). The values obtained were found to be substantially smaller than the energy gaps of corresponding passivated clusters. This work considers dimensional reduction as a possible mechanism for a sizeable energy gap narrowing ...

The correlation between sub-band gap absorption and the chemical states and electronic and atomic structures of S-hyperdoped Si have been extensively studied, using synchrotron-based x-ray photoelectron spectroscopy (XPS), x-ray absorption near-edge spectroscopy (XANES), extended x-ray absorption fine structure (EXAFS), valence-band photoemission spectroscopy (VB-PES) and first-principles calcu...

Si is an important anode material for the next generation of Li ion batteries. Here the energetics and dynamics of Li atoms in bulk Si have been studied at different Li concentrations on the basis of first principles calculations. It is found that Li prefers to occupy an interstitial site as a shallow donor rather than a substitutional site. The most stable position is the tetrahedral (T(d)) si...

On the way to integrate lattice mismatched semiconductors on Si(001), the Ge/Si heterosystem was used as a case study for the concept of compliant substrate effects that offer the vision to be able to integrate defect-free alternative semiconductor structures on Si. Ge nanoclusters were selectively grown by chemical vapour deposition on Si nano-islands on silicon-on-insulator (SOI) substrates. ...

We report density functional electronic structure calculations to monitor the change in the surface characteristics of the Si (100)-2x1 surface after fluorination followed by interaction with water. Embedded finite silicon clusters are used to model an extended Si (100)-2x1 surface. Two high symmetry pathways and subsequent adsorption sites were examined: (i) adsorption of an fluorine atom dire...

On the basis of density functional theory calculations, we present the energetics, structure, and electronic and mechanical properties of crystalline and amorphous Li-Si alloys. We also discuss the dynamic behavior of the alloys at finite temperatures based on ab initio molecular dynamics. When the Li content is sufficiently high, alloying between Li and Si is energetically favorable as evidenc...

We present a series of new intermetalloid clusters (R3P)CuGe9((Hyp)3, (R=Me, Et, iPr, nBu, tBu) (Hyp=Si(SiMe3)3) (R3P)AuGe9(Hyp)3MGe9(Hyp)3 (R=Ph, Me; M=Au, Cu). In conjunction with already known clusters, these give insights into the bonding situation metal bridged Ge9 as well better understanding formation clusters. Additionally, smallest phosphine PMe3 show motives.

ARTICLE INFO ABSTRACT Keywords: Au Cluster Oxidation Au cluster anions consisting of 2-13 atoms were soft-landed on native-oxide-covered Si wafers. Reaction of soft-landed clusters with an atomic oxygen atmosphere was studied using X-ray photoelectron spec-troscopy (XPS)_ Aus. AU7. and AU 13 turned out to show pronounced inertness for Au-oxide formation. When the samples with deposited Au clust...

Background In animals and human subjects, an increase in background signal intensity observed on late gadolinium enhanced (LGE-SI) images is associated with a decrement in left ventricular ejection fraction (LVEF) during receipt of anthracycline chemotherapy. Moran’s I statistic is a measurement of spatial dispersion of hyperenhanced voxels relative to the mean myocardial LGE-SI, ranging from h...