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Showing 1 to 20 of 24 for “"electron beam irradiation"”.
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Josephson Junctions and Devices fabricated by Focused Electron Beam Irradiation
The irradiation of high Tc superconducting thin films with a focused electron beam, such as that obtained in a scanning transmission electron microscope (STEM), can result in the formation of a Josephson junction. The conditions required for the formation of these Josephson junctions in YBa2Cu3O7-d …
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Electron beam irradiation of polystyrene/poly(vinyl methyl ether) blends
The effects of electron beam radiation on the rheological behavior of a polystyrene/poly(vinyl methyl ether) blend as a function of absorbed dose, composition, and temperature, were investigated. The purpose of this research has been to modify the viscosity of polystyrene by studying the influences …
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The effects of electron beam irradiation on additives present in food-contact polymers.
… of these stabilized polymers were subjected to electron-beam or gamma irradiation to receive doses of 1,5,10,25 and 50 kGy. The effects of electron-beam irradiation on the amount of extractable antioxidant in polymers were determined. Using hplc techniques it was found that there was a …
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Efficacy of selected chemicals and electron beam irradiation for destroying Escherichia coli 0157:H7 and Salmonella on cantaloupe skin
… (5% HP), sodium lauryl sulfate (1% SLS), and irradiation for destroying Escherichia coli 0157:H7 and Salmonella spp. on the outer rind surface of cantaloupe. Cantaloupe rinds were cut into 2.5 cm2 pieces and inoculated with either a five strain mixture of nalidixic acid resistant Salmonella …
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Structural Analysis and Radiation Response of Multi-Walled Boron Nitride Nanotubes
Electron irradiation damage analysis has revealed that: (1) Damage mechanism is different from carbon nanotubes; no radiation induced amorphization was observed, (2) irradiation response of BN nanotubes to 200 keV electrons in TEM environment is almost independent of temperature, (3) under intense …
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Aspects of radiation curing
The electron beam induced polymerisation of dialkyltin diacrylates, as well as the UV and electron beam induced polymerisation of some novel silicon containing acrylates are discussed. The reactivity and film forming properties of these materials are compared with that of some commercial diluents …
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Structure-Property Relationships in Polymeric Materials Generated by Electron Beam Processing
… review, these three studies involving the electron beam processing and subsequent characterization of various polymeric materials are presented. The first study involves the generation of cellular materials by electron beam irradiation. A technique was developed for generating a cellular …
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Imaging the dynamics of soft materials at microscale and nanoscale
… microscopes and liquid-phase transmission electron microscope, have been utilized to capture the dynamics of three distinct yet typical soft materials in situ at different length scales: colloids, polymeric chains, and nanobubbles. While conventional interests have been focused on the …
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Comparative Impacts of Irradiation on Antioxidant Compounds of Scalded and Non-scalded Skin of Granny Smith Apples
… study evaluated the effects of gamma, X-ray, and electron beam irradiation on antioxidants – ascorbic acid, total phenolics, α-tocopherol, carotenoids, chlorophyll, and campesterol – in scalded and non-scalded apple peel tissue. Apples were treated with 0.2-0.77 kGy and stored at 0-1 °C. …
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The Fabrication of Josephson Junctions with an Electron Beam
… thesis the use of a focused high energy (350keV) electron beam to damage the high temperature superconductor YBa$_{2}$Cu$_{3}$O$_{7-}$$_{\delta}$ as a method of producing Josephson junctions is discussed. The technique is possible because of the sensitivity of the …
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Creation and modification of polymeric materials using electron beam radiation
… review, four different studies involving the electron beam irradiation and subsequent characterization of various polymeric materials are presented. The first study describes a novel process that has been developed for producing crosslinked polymeric microspheres. With this process, it is …
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Electron beam processing and spectroscopic characterisation of 2D materials and novel nanostructures
… counterparts. Excellent and unique mechanical, electronic and optical properties have recently been discovered which can potentially span a large range of conceptually new applications such as high speed flexible electronics, sub-diffractional nanophotonic devices, strain engineered variable …
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Microbial Safety, Shelf Life Stability, Quality Preservation, and Consumer Acceptance of Vacuum-infused, Irradiated Chicken Breast Meat Treated with Natural Plant Extracts and Organic Acids
… events are still uncomfortably frequent. Irradiation is a safe and effective means of ensuring the safety of both ready-to-cook and ready-to-eat poultry but is not utilized in the United States. This is due, in part, to certain irradiation dose-dependent quality characteristic defects …
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Defect reactions and impurity control in silicon
… transport processes such as dopant diffusion. Electron beam irradiation has been used to generate Sii and V to initiate the defect reactions. Deep level transient spectroscopy (DLTS) has been used to identify specific defects and to measure defect concentrations. The experimental results can be …
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Nitride semiconductors studied by atom probe tomography and correlative techniques
Optoelectronic devices fabricated from nitride semiconductors include blue and green light emitting diodes (LEDs) and laser diodes (LDs). To design efficient devices, the structure and composition of the constituent materials must be well-characterised. Traditional microscopy techniques used to …
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Structure-property relationships of electron beam cured systems containing bis-GMA
… deriva-tives of bisphenol-A crosslinked by electron beam irradiation. This material, commonly called bis-GMA, is a viscous liquid at room temperature which crosslinks to form a glassy network when a 3 to 5 mil coating is irradiated with sufficient energy. The major parameters which were …
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Chitosan Decontamination with Non-Thermal Nitrogen Plasma to Enable Internal Use
… that hemostatic chitosan pads sterilized with electron beam irradiation and NtNP stopped femoral artery and artery/vein bleeding better than pads treated with either treatment alone and equivalent to unsterilized pads. A porcine kidney bleeding model showed that NtNP-sterilized pads had …
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A combined experimental and theoretical approach towards the understanding of transport in one-dimensional molecular nanostructures
… in the past two decades due to its outstanding electronic and mechanical features. We have investigated the properties of a novel family of carbon nanostructures, named here as Y-shaped rings. The studies show that they present very interesting quantum interference effects. A high structural …
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Novel phase and phase transition behavior of a superionic conductor observed on the nanoscale
… I employed in-situ transmission electron microscopy (TEM) for understanding the ionic structure, vacancy ordering, phase transitions, and ion transport in a prototypical fast-ion conductor, copper selenide. Major objectives of my work were to elucidate i) the nature of the …
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In-situ electron imaging of oxidation and reduction of rutile (TiO2) nanocrystals and interaction with palladium
… the new and improved environmental transmission electron microscopy (ETEM) methods. We focus on the surface and interface of TiO2 nanocrystals and Pd nanoparticles supported on TiO2 and observe their structural dynamics by direct electron imaging. In our experimental setup, we flow the gas …
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