Korea Institute of Energy Research posted this:Apparatus for producing silicon nanocrystals based on inductively coupled plasma.Researchers at the Korea Institute of Energy Research have developed a new apparatus for producing silicon nanocrystals based on inductively coupled plasma. Silicon nanocrystals have been widely investigated for several years because of their many interesting properties and potential use in several applications. Recently, silicon nanocrystals have been used in solar cells and light emitting device (LEDs). Silicon is an environmentally friendly material and is utilised for various applications in the field of electronic materials. The field of silicon nanocrystal production has grown enormously of late, in response to the observation of quantum confinement in porous silicon. Silicon is already widely used in the semiconductor industry, in large part because of its nontoxic properties and abundance, being the second most abundant element in the earth’s crust. Due to the high capacity of silicon paired with its relatively environmentally friendly properties it is an ideal material for use as a replacement to more commonly used environmentally costly materials. The common process of producing silicon nanocrystals can be classified into three distinct areas: solid-state reaction, liquid state reaction, and vapour state reaction. The solid-state reaction is the process whereby a thin film of SiO2, Si3N4 or the like containing excess Silicon (Si) is formed and subjected to heat treatment to enable the condensation of silicon and subsequent formation of silicon nanocrystals in a SiO2, Si3N4 or SiC matrix. In the liquid state reaction, silicon nanocrystals are prepared via a chemical reaction of silicon compounds, this is done through the application of variant methods, for example the high-temperature supercritical method. In the vapour state reaction, silicon nanocrystals are prepared by passing a silane compound gas through a high energy region such as laser or plasma. In the case of all three traditional silicon nanocrystals reaction methods (solid, liquid and gas) the process incurs significant cost due to the substantial need for heat energy and expensive deposition equipment. What’s more, in the liquid State reaction issues arise due to the severe difficulty in controlling particle size, which in turn leads to poor crystallinity quality. The vapour state reaction incurs further issues due to the extreme use of energy resulting in aggregated nanocrystals and the formation of secondary particles. To overcome the inherent issues of solid, liquid and vapour silicon nanocrystal reactions non-thermal plasma, such as inductively coupled plasma (IPC) has begun to be used. However, the conventional ICP-based apparatus has limitations and can result in issues pertaining to the management of the particle size of silicon nanocrystals, as well as extending reaction time and deteriorating silicon nanocrystal quality. To combat the aforementioned limitations in silicon nanocrystal production a new apparatus method has been designed, which can minimise plasma diffusion inside the reactor during production using ICP to improve the particle size characteristics and quality of the silicon nanocrystals.
RAMOT at Tel Aviv University Ltd. posted this:Metal alloy nano-foams as Catalysts for Methane Dry Reforming during GTLProof of concept of metal foams as promissing GTL catalyst materials - Electrodeposited Ni-foam catalyst shown stable performance for methane reforming with an area of ca. 5 m2/g, which matches the performance of many supported powder catalysts having areas of 5-20 times larger (Colton Nadal). Advanced development (MF) of high surface-area metal alloy nano-foams as GTL catalysts targets conversion rate of 80% and volume processing of 100 liter/ gram/ hour at atmospheric pressure and 700-800C. Project ID : 6-2015-911
RAMOT at Tel Aviv University Ltd. posted this:Enhancement of Durability, Sensitivity and Selectivity of Environmental Sensors & BioSensors by Peptide NanotubesA Peptide NanoForest, is a dense array of self assembling organic nanotubes, capable of enhancing sensitivity and selectivity parameters of amperometric electrode high-performance sensors. The patented Diphenylalanine (FF) aromatic dipeptide nanotubes are formed under mild conditions from inexpensive building blocks. These bioinspired materials have a unique mechanical strength. They have a high Young’s modulus of about 20–30 GPa. In addition, the inherent biocompatibility of the structures along with the options of their chemical and biological modifications, extraordinary thermal stability, and organic solvent stability, lead to a novel class of nanostructures for sensing applications. The vertical arrangement of the peptide nanotubes enable the deposition of a larger number of nanotubes on the same surface, resulting in a remarkable surface area increase. FF peptide-nanotube-based sensors are benchmarked to CNT-based sensor, and clearly demonstrate the enhancement effect. Project ID : 3-2011-149
RAMOT at Tel Aviv University Ltd. posted this:Characterization of Porous Media for Petroleum ExcavationsA diffusion magnetic resonance (MR) method for non-invasively visualizing geochemistry and microstructures of porous sediment samples. The method provides quantification of pore sizes, pore size distribution and measure on pore eccentricities even for heterogeneous samples in the presence of free water or other liquids. Most diffusion MR methods use single pulsed-field-gradient (PFG) MR sequences; however such sequences are only beneficial for measurement of uniform, highly ordered media. We use the angular bipolar double-pulsed-field gradient (bp-d-PFG) to measure the poly dispersed sizes and shapes of pores of sedimentary rock samples with inter connections and three-dimensional organization. No a priori knowledge on the sizes or distribution is required. Project ID : 6-2012-372
RAMOT at Tel Aviv University Ltd. posted this:Iron oxide nanoparticles (IOP) for the treatment of acute myocardial infarction (AMI) and other inflammatory conditionsA novel approach for the treatment of AMI has been developed using IOPs. IOPs, when injected into the infarcted myocardium, lead to improved heart function after MI. IOPs activate anti-inflammatory macrophages and thus promote tissue healing and repair and prevent myocardial remodeling and dysfunction. Potential Applications IOPs can be used to treat AMI and other inflammatory conditions associated with pro-inflammatory activated macrophages and to promote tissue healing and repair. Advantages ? IOPs are nontoxic ? IOPs are FDA approved for use in humans for MRI imaging Stage In vivo studies in mouse and rat models of MI and heart failure Project ID : 10-2011-247
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