Advertisement

Topics

PubMed Journals Articles About "Move Over Silicon Switches There Compute" RSS

22:34 EDT 15th June 2019 | BioPortfolio

Move Over Silicon Switches There Compute PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Move Over Silicon Switches There Compute articles that have been published worldwide.

More Information about "Move Over Silicon Switches There Compute" on BioPortfolio

We have published hundreds of Move Over Silicon Switches There Compute news stories on BioPortfolio along with dozens of Move Over Silicon Switches There Compute Clinical Trials and PubMed Articles about Move Over Silicon Switches There Compute for you to read. In addition to the medical data, news and clinical trials, BioPortfolio also has a large collection of Move Over Silicon Switches There Compute Companies in our database. You can also find out about relevant Move Over Silicon Switches There Compute Drugs and Medications on this site too.

Showing "Move Over Silicon Switches There Compute" PubMed Articles 1–25 of 1,000+

Silicon Nanowire Heterojunction Solar Cells with an AlO Passivation Film Fabricated by Atomic Layer Deposition.

Silicon nanowires (SiNWs) show a great potential for energy applications because of the optical confinement effect, which enables the fabrication of highly efficient and thin crystalline silicon (c-Si) solar cells. Since a 10-μm-long SiNW array can absorb sufficient solar light less than 1200 nm, the 10-μm-long SiNW was fabricated on Si wafer to eliminate the influence of the Si wafer. On the other hand, Surface passivation of the SiNWs is a crucial problem that needs to be solved to reduce surface reco...


Surface deep profile synchrotron studies of mechanically modified top-down silicon nanowires array using ultrasoft X-ray absorption near edge structure spectroscopy.

Atomic, electronic structure and composition of top-down metal-assisted wet-chemically etched silicon nanowires were studied by synchrotron radiation based X-ray absorption near edge structure technique. Local surrounding of the silicon and oxygen atoms in silicon nanowires array was studied on as-prepared nanostructured surfaces (atop part of nanowires) and their bulk part after, first time applied, in-situ mechanical removal atop part of the formed silicon nanowires. Silicon suboxides together with distur...

Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes.

Although silicon is a promising anode material for lithium-ion batteries, scalable synthesis of silicon anodes with good cyclability and low electrode swelling remains a significant challenge. Herein, we report a scalable top-down technique to produce ant-nest-like porous silicon from magnesium-silicon alloy. The ant-nest-like porous silicon comprising three-dimensional interconnected silicon nanoligaments and bicontinuous nanopores can prevent pulverization and accommodate volume expansion during cycling r...


Rational design of silicon structures for optically controlled multiscale biointerfaces.

Silicon-based materials have been widely used. However, remotely controlled and interconnect-free silicon configurations have been rarely explored, because of limited fundamental understanding of the complex physicochemical processes that occur at interfaces between silicon and biological materials. Here, we describe rational design principles, guided by biology, for establishing intracellular, intercellular and extracellular silicon-based interfaces, where the silicon and the biological targets have matche...

First synthesis of silicon nanoscrystals in amorphous silicon nitride from a preceramic polymer.

We report the first synthesis of silicon nanocrystals embedded in a silicon nitride matrix through a direct pyrolysis of a preceramic polymer (perhydropolysilazane). Structural analysis carried out by XRD, XPS, Raman and TEM reveals the formation of silicon quantum dots and correlates the microstructures with the annealing temperature. The photoluminescence of the nanocomposites was investigated by both linear and nonlinear measurements. Furthermore we demonstrate an enhanced chemical resistance of the nitr...

Phosphoinositide switches in endocytosis and in the endolysosomal system.

Phosphoinositides (PIs) and their spatiotemporally controlled production, turnover, and interconversion is catalyzed by specific PI phosphatases and kinases and their regulators to allow rapid switching of subcompartmental PI identity. Recent studies have begun to decipher such PI switches at the molecular level and to unravel their physiological functions in endocytosis and endolysosomal membrane dynamics as well as in the control of autophagy and nutrient signaling at late endosomes/lysosomes. In this rev...

Extracytoplasmic Function σ Factors Can Be Implemented as Robust Heterologous Genetic Switches in Bacillus subtilis.

In bacteria, the promoter specificity of RNA polymerase is determined by interchangeable σ subunits. Extracytoplasmic function σ factors (ECFs) form the largest and most diverse family of alternative σ factors, and their suitability for constructing genetic switches and circuits was already demonstrated. However, a systematic study on how genetically determined perturbations affect the behavior of these switches is still lacking, which impairs our ability to predict their behavior in complex circuitry. H...

Facile Access to a NHC-Coordinated Silicon Ring Compound with a Si=N Group and a Two-Coordinate Silicon Atom.

Reaction of the bicyclo[1.1.0]tetrasilatetraamide Si4{N(SiMe3)Dipp}4 1 (Dipp = 2,6-Diisopropylphenyl) with 5 equiv. of the N-heterocyclic carbene NHCMe4 (1,3,4,5-tetramethyl-imidazol-2-ylidene) affords a bifunctional carbene coordinated four-membered ring compound with a Si=N group and a two-coordinate silicon atom Si4{N(SiMe3)Dipp}2(NHCMe4)2(NDipp) 2. In a reaction of 2 with ¼ equiv sulfur (S8) two sulfur atoms add to the divalent silicon atom in plane and perpendicular to the plane of the Si4 ring which ...

Ionothermal Synthesis of Crystalline Nanoporous Silicon and Its Use as Anode Materials in Lithium-Ion Batteries.

Silicon has great potential as an anode material for high-performance lithium-ion batteries (LIBs). This work reports a facile, high-yield, and scalable approach to prepare nanoporous silicon, in which commercial magnesium silicide (MgSi) reacted with the acidic ionic liquid at 100 °C and ambient pressure. The obtained silicon consists of a crystalline, porous structure with a BET surface area of 450 m/g and pore size of 1.27 nm. When coated with the nitrogen-doped carbon layer and applied as LIB anod...

Lithiation Behavior of Coaxial Hollow Nano-Cables of Carbon-Silicon Composite.

A design of coaxial hollow nano-cables of carbon nanotubes and silicon composite (CNTs@Silicon) was presented, and the lithiation/delithiation behavior was investigated. The FIB-SEM studies demonstrated hollow structured silicon tend to expansion inward and shrink outward during lithiation/delithiation, which reveal the mechanism of inhibitive effect of the excessive growth of solid electrolyte interface (SEI) by hollow structured silicon. The as-prepared coaxial hollow nano-cables demonstrates an impressiv...

Design of a 2 × 4 Hybrid MMI-MZI Configuration with MMI Phase-Shifters.

This paper reports design of a 2 × 4 hybrid multimode interferometer-Mach-zehnder interferometer (MMI-MZI) configuration consiting of compact thermo-optical switches on the silicon-on-insulator (SOI) platform. The device consists of two identical MMI slab waveguides as power splitters and couplers that are connected with two identical MMI-based phase shifters, and linear tapers at both ends of the MMIs to minimize the power coupling loss. A thin Al pad is used as a heating element and a trench is created a...

Fano-resonant silicon photonic crystal slab for efficient third-harmonic generation.

Strong light-matter interactions in resonant photonic nanostructures open up opportunities for enhancing nonlinear responses. In this work, by applying Fano resonances, we experimentally demonstrate efficient third-harmonic generation (THG) obtained with 2D silicon photonic crystal slabs (PCSs) thanks to the field enhancement in the dielectric layer. A 160-fold enhancement of THG is observed in the silicon PCS compared to the unpatterned silicon film. Through slightly changing the radius of the PCS, tunable...

Three-dimensional radial junction solar cell based on ordered silicon nanowires.

Highly ordered silicon nanowires (SiNWs) were fabricated by nanoimprint lithography and Bosch etching methods. A polycrystalline silicon shell was grown to form a radial p-n junction. To enhance its anti-reflection properties and conductivity, a thin ITO layer was deposited on the SiNWs solar cell, then a micro-grid electrode was introduced to minimize the metal areas to maximize carrier collection. Finally, shorter nanowires were used to reduce surface recombination and achieve an efficiency of 10.5%. This...

Enzyme free glucose sensing by amino-functionalized silicon quantum dot.

Silicon quantum dots have become one of the most popular nanomaterials in biological applications for their excellent biocompatibility and optical properties. Herein, we synthesized amino-functionalized silicon quantum dots (NH@SiQDs) via a simple microemulsion method, in which silicon tetrachloride and allylamine were used as source of silicon and functional group. NH@SiQDs exhibits good water-solubility, high fluorescence quantum yield and optical stability. A non-enzymatic biosensor of glucose was develo...

Regiodivergent and Stereospecific Aziridine Opening by Copper-Catalyzed Addition of Silicon Grignard Reagents.

A stereospecific ring opening of various 2-aryl-substituted aziridines with silicon Grignard reagents under copper catalysis is reported. The regiochemical outcome is governed by the steric demand of the silicon nucleophile. The LiCl introduced with the magesium reagent R3SiMgX∙2LiCl was shown to enhance the SN2-type displacement of the carbon-nitrogen bond by coordination to the aziridine nitrogen atom.

Free-carrier detection in a silicon slab via absorption measurement in 2D integrating cells.

2D integrating cells provide long optical path lengths on a chip by multiple reflections at highly reflective mirrors similar to integrating spheres in free space. Therefore, they build a promising platform for integrated optical absorption sensing. Here, we present first absorption measurements of free carriers generated by a modulated pump laser inside a 2D integrating cell in a silicon slab. The results can be used to evaluate the lifetimes of free carriers in silicon slabs for integrated optics. Employi...

High-Q tellurium-oxide-coated silicon nitride microring resonators.

We report on tellurium-oxide (TeO)-coated silicon nitride microring resonators with internal quality factors up to 7.3×10, corresponding to 0.5 dB/cm waveguide loss, at wavelengths around 1550 nm. The microring resonators are fabricated using a silicon nitride foundry process followed by TeO coating deposition in a single post-processing step. The silicon nitride strip height of 0.2 μm enables a small microring bending radius, while the TeO coating thickness of 0.33 μm results in a large modal overla...

An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond.

Despite tremendous efforts to synthesize isolable compounds with an Si=O bond, silicon analogues of ketones that contain an unperturbed Si=O bond have remained elusive for more than 150 years. Herein, we report the synthesis of an isolable silicon analogue of a ketone that exhibits a three-coordinate silicon center and an unperturbed Si=O bond, thus representing the first example of a genuine silanone. Most importantly, this silanone does not require coordination of Lewis bases and acids and/or the introduc...

Silicon enhances the salt tolerance of cucumber through increasing polyamine accumulation and decreasing oxidative damage.

Silicon can increase salt tolerance, but the underlying mechanism has remained unclear. Here, we investigated the effect of silicon on polyamine metabolism and the role of polyamine accumulation in silicon-mediated salt tolerance in cucumber. Seedlings of cucumber 'JinYou 1' were subjected to salt stress (75 mM NaCl) in the presence or absence of added 0.3 mM silicon. Plant growth, polyamine metabolism and effects of exogenous polyamines and polyamine synthesis inhibitor dicyclohexylammonium sulphate on...

Simulation and analysis of electro-optic tunable microring resonators in silicon thin film on lithium niobate.

Silicon thin film on lithium niobate combines the advantages of electronic properties of silicon and optical properties of lithium niobate, making it an ideal platform for high-density integrated optics. In this paper, we present an electro-optic tunable microring resonator in silicon thin film on lithium niobate operating at wavelengths of approximately 1.55 μm. The single-mode conditions, optical power distribution, mode profiles, and propagation losses of silicon waveguides are discussed and compared sy...

Solution synthesis of porous silicon particles as an anode material for lithium ion batteries.

Nanostructured silicon-based materials with porous structures have recently become impressive anode materials with high capacity and cycling performance for lithium-ion battery. However, the current preparation of porous silicon has generally been confronted with the struggle of multiple complex steps and complicated synthesis. In the present study, porous silicon with high surface area was prepared via a high yield and simple reaction in which commercial magnesium powders can readily react with HSiCl3 with...

Active broadband terahertz wave impedance matching based on optically doped graphene-silicon heterojunction.

Broadband terahertz impedance matching is important for both spectral resolution improvement and terahertz anti-radar technology. Herein, graphene-silicon hybrid structure has been proposed for active broadband terahertz wave impedance matching with optical tunability. The main transmission pulse measured in the time domain indicates a modulation depth as high as 92.7 % totally from the graphene-silicon interface. The interface reflection from the graphene-silicon junction implies that an impedance matching...

Carrier dynamics in silicon nanowires studied via femtosecond transient optical spectroscopy from 1.1 to 3.5 eV.

We present femtosecond transient transmission (or absorbance) measurements in silicon nanowires in the energy range 1.1-3.5 eV, from below the indirect band-gap to above the direct band-gap. Our pump-probe measurements allow us to give a complete picture of the carrier dynamics in silicon. In this way we perform an experimental study with a spectral completeness that lacks in the whole literature on carrier dynamics in silicon. A particular emphasis is given to the dynamics of the transient absorbance at th...

A New, Effective and Low Cost Dual-Functional Binder for Porous Silicon Anodes in Lithium-Ion Batteries.

In this work, a new effective and low-cost binder applied in porous silicon anode is designed through blending of low cost poly(acrylic acid) (PAA) and poly(ethylene-co-vinyl acetate) (EVA) latex (PAA/EVA) to avoid pulverization of electrodes and loss of electronic contact because of huge volume changes during repeated charge/discharge cycles. PAA with a large number of carboxyl groups offers strong binding strength among porous silicon particles. EVA with the high elastic property enhances the ductility of...

Amorphous Silicon with Extremely Low Absorption: Beating Thermal Noise in Gravitational Astronomy.

Amorphous silicon has ideal properties for many applications in fundamental research and industry. However, the optical absorption is often unacceptably high, particularly for gravitational-wave detection. We report a novel ion-beam deposition method for fabricating amorphous silicon with unprecedentedly low unpaired electron-spin density and optical absorption, the spin limit on absorption being surpassed for the first time. At low unpaired electron density, the absorption is no longer correlated with elec...


Advertisement
Quick Search
Advertisement
Advertisement