Heterojunction photoanodes, consisting of n-type crystalline Si(100) substrates coated with a thinB50 nm film of cobalt oxide fabricated using atomic-layer deposition (ALD), exhibited photocurrent-onset potentials of 205 20 mV relative to the formal potential for the oxygen-evolution reaction (OER), ideal regenerative solar-to-O2(g) conversion efficiencies of 1.42 0.20%, and operated continuous...

We report ordered, high aspect ratio, tapered Si microwire arrays that exhibit an extremely low angular (0° to 50°) and spectrally averaged reflectivity of <1% of the incident 400−1100 nm illumination. After isolating the microwires from the substrate with a polymer infill and peel off process, the arrays were found to absorb 89.1% of angular averaged incident illumination (0° to 50°) in the eq...

Si wire arrays are a promising architecture for solar-energy-harvesting applications, and may offer a mechanically flexible alternative to Si wafers for photovoltaics. To achieve competitive conversion efficiencies, the wires must absorb sunlight over a broad range of wavelengths and incidence angles, despite occupying only a modest fraction of the array's volume. Here, we show that arrays havi...

PURPOSE To evaluate the value of diffusion-weighted imaging (DWI) in the differential diagnosis of pleural effusions. MATERIALS AND METHODS 58 pleural effusions (21 transudative, 37 exudative) were included in this prospective study. Single-shot echo-planar spin echo DWI was performed with two b factors (500 and 1000 s/mm (2)), and apparent diffusion coefficients (ADCs) were calculated. On di...

This paper presents an energy-harvesting system consisting of amorphous-silicon (a-Si) solar cells and thinfilm-transistor (TFT) power circuits on plastic. Along with patterned planar inductors, the TFTs realize an LCoscillator that provides power inversion of the DC solarmodule output, enabling a low-cost sheet for inductivelycoupled wireless charging of devices. Despite the low performance of...

this paper investigates the kinetics of structure h (sh) formation kinetics above and below the structure i (si) formation equilibrium curve at temperatures of between 2â°c and 6â°c. methane was used as a help gas and methylcyclohexane (mch) was used as sh former. it was concluded that in the points above the si formation equilibrium curve, at the first, the si forms, and then converts to sh be...

A method to conformally coat silica nanosprings with magnesium via sublimation at 450 °C has been developed. In addition, Mg thin films were grown on Si(100) using this determine the effects of substrate morphology (nanoscale curvatures vs. planar) interfacial coating. High-resolution/powder X-ray diffraction (HRXRD/PXRD) both Mg-coated NS and film revealed presence Mgand MgO due exposure sampl...

Considering the network structure is one of the new approaches in studying stochastic PERT networks (SPN). In this paper, planar networks are studied as a special class of networks. Two structural reducible mechanisms titled arc contraction and deletion are developed to convert any planar network to a series-parallel network structure.&#10In series-parallel SPN, the completion time distribution...

Self-aligned four-terminal (4T) planar metal double-gate (DG) polycrystalline-silicon (poly-Si) thin-film transistors (TFTs) were fabricated on a glass substrate at a low temperature (LT), which is below 550◦C, to realize high performance and low power dissipation system-onglass (SoG). The top gate (TG) and bottom gate (BG) were formed from tungsten (W); the BG was embedded in the glass substra...

Nanoscale dielectric resonators and quantum-confined semiconductors have enabled unprecedented control over light absorption and excited charges, respectively. In this work, we embed luminescent silicon nanocrystals (Si-NCs) into a 2D array of SiO2 nanocylinders and experimentally prove a powerful concept: the resulting metamaterial preserves the radiative properties of the Si-NCs and inherits ...