BACKGROUND AND PURPOSE Recent neuropathologic research suggests thalamic involvement in sporadic Creutzfeldt-Jakob disease (sCJD), which has been disregarded in imaging studies. Diffusion-weighted (DW) MR imaging has the highest sensitivity for the detection of signal intensity (SI) abnormalities in CJD. We hypothesized that pathologic changes in the thalamus in sCJD can be detected by using a ...

We developed a maskless plasma texturing technique for multicrystalline silicon (mc-Si) cells using Reactive Ion Etching (RIE) that results in higher cell performance than that of standard untextured cells. Elimination of plasma damage has been achieved while keeping front reflectance to extremely low levels. Internal quantum efficiencies as high as those on planar cells have been obtained, boo...

Let S0, S1, . . . , Sk−1 be k sets of points such that the points of Si are colored with color i (i = 0, . . . , k−1). Let G be a planar graph such that |Si| vertices of G have color i, for every 0 ≤ i ≤ k − 1. A k-chromatic point-set embedding of G on S = S0 ∪ S1 ∪ · · · ∪ Sk−1 is a crossing-free drawing of G such that each vertex colored i is mapped to a point of Si, and each edge is a polygo...

Intentional and unintentional doping in semiconductor nanowires undoubtedly have significant impact on the device performance. However, spatially resolved precise determination of dopant concentration is challenging due to insufficient sensitivity and resolution of conventional techniques. In this paper, quantitative 3D distribution of Si and Zn dopants in planar GaAs nanowires and their interf...

In the title compound, C(14)H(21)N(2)Si(+)·Br(-)·H(2)O, the benzimidazole ring system is almost planar [maximum deviation = 0.021 (2) Å]. In the crystal, O-H⋯Br and C-H⋯O hydrogen bonds link the ions via the O atoms of the water mol-ecules. In addition, there are π-π stacking inter-actions between the centroids of the benzene and imidazole rings of the benzimidazole ring system [centroid-centro...

Recently, we reported a series of global minima whose structures consist carbon rings decorated with heavier group 14 elements. Interestingly, these feature planar tetracoordinate carbons (ptCs) and result from the replacement five or six protons (H+) cyclopentadienyl anion (C5H5−) pentalene dianion (C8H62−) by three four E2+ dications (E = Si–Pb), respectively. The silicon derivatives are Si3C...

This paper focuses on anti-reflective coatings monocrystalline silicon solar cells and the impact of front surface texturing. The reference wavelength is =700 nm, with its optimum refractive index (n = 3.7838) a reflectivity 33%. calculations were made basis layer thickness values indices that allow phase amplitude conditions chosen to be respected, namely (MgF2) (SiOxNy), (SiOx), (SiNx:H). Num...

Si(331)-(12x1) is the only confirmed planar silicon surface with a stable reconstruction located between (111) and (110). We have optimized the annealing sequence and are able to obtain almost defect free, atomically precise surface areas approaching micrometer dimensions. The unprecedented perfection of the surface combined with its pronounced structural anisotropy makes it a promising candida...

Analogous to planar heteroepitaxy, misfit dislocation formation and stress-driven surface roughening can relax coherency strains in misfitting core-shell nanowires. The effects of coaxial dimensions on strain relaxation in aligned arrays of Ge-core/Si-shell nanowires are analyzed quantitatively by transmission electron microscopy and synchrotron X-ray diffraction. Relating these results to repo...

A one-dimensional array of nanopores horizontally aligned on a silicon substrate was successfully fabricated by anodic aluminum oxidation (AAO) using a modified two-step procedure. SEM pictures show clear nanostructures of well-aligned one-dimensional nanopore arrays without cracks at the interfaces of the sandwiched structures. The processes are compatible with the planar silicon integrated ci...