Search Results for "Negative Charge Secondary Emission Yield"
Original Source: Angular Dependence of the Ion-Induced Secondary Electron Emission for He+ and Ga+ Beams.
In recent years, novel ion sources have been designed and developed that have enabled focused ion beam machines to go beyond their use as nano-fabrication tools. Secondary electrons are usually taken to form images, for their yield is high and strongly dependent on the surface characteristics, in terms of chemical composition and topography. In particular, the secondary electron yield varies characteristically with the angle formed by the beam and the direction normal to the sample surface in the point of i...
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Positron Emission Tomography (PET) is a scanning technique that uses an MRI scanner and radioactive substances that are injected into the blood stream to obtain detailed images of the brain that rel...
Singlephoton emission CT SPECT
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Large spontaneous emission enhancement in plasmonic nanocavities
Researchers demonstrate spontaneous emission enhancements approaching 1,000 for emitters coupled to the gap between a metal wire and a metal substrate. The enhanced emission rate of plasmons in the st...
Researchers synthesize negative-charge carrying molecular structures
University of Oregon chemists have synthesized organic molecular structures that move both positive and negative electrical charges—a highly desired but often difficult combination to achieve in cur...
Transgenic insect resistance traits increase corn yield and yield stability
"Commercial corn breeding programs, which measure yield on millions of plots per year, provide a unique opportunity to observe yield effects over multiple years and locations. In experiments spanning...
Conversion of broadband to narrowband thermal emission through energy recycling
By constructing a thermal emission control device based on a multiple-quantum-well layer embedded in a two-dimensional photonic crystal, researchers demonstrate that they can convert a broadband therm...
Ecology: Flower power guides bees
Along with colour and scent, electrical fields on flowers can guide bees' search for pollen and nectar.Flowers often have a negative charge, whereas insects such as bumblebees (Bombus terrestris) tend...
Issuers stay aggressive in US high-yield market
Oct 5 (IFR) - Issuers continued to get away with aggressively priced and structured deals in the US high-yield market this week, despite recent widening from September's record low yields. The average...
Secondary tightening spurs primary bond issues
Sept 18 (IFR) - The issuance rush in the US investment-grade primary market intensified on Tuesday, spurred by a tightening on the secondary market of several new issues that priced with large negativ...
Japan’s Pharmaceuticals Companies Struggling To Meet CO2 Emission Targets
Japanese pharmaceuticals will struggle to meet the carbon dioxide emission targets set at the end of this fiscal year, according to a report from the JPMA’s Environment and Safety Committee meeting...
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We have synthesized a series of new terfluorene derivatives, and investigated their novel fluorescence emission behaviors. We have demonstrated a new intramolecular through-space charge transfer emiss...
Structural changes in apolipoproteins bound to nanoparticles.
Nanoparticles are widely used in the pharmaceutical and food industries, but the consequences of exposure to the human body have not been thoroughly investigated. Apolipoprotein A-I (apoAI), the major...
Synthesis and properties of differently charged chemiluminescent acridinium ester labels.
Chemiluminescent acridinium dimethylphenyl esters containing N-sulfopropyl groups in the acridinium ring are highly sensitive, hydrophilic labels that are used in automated immunoassays for clinical d...
Angular Dependence of the Ion-Induced Secondary Electron Emission for He+ and Ga+ Beams.
In recent years, novel ion sources have been designed and developed that have enabled focused ion beam machines to go beyond their use as nano-fabrication tools. Secondary electrons are usually taken...
Energy Transfer Tunes Phosphorescent Color of Single-Dopant White OLEDs.
A quantitative theoretical model, based on the Förster theory of energy transfer and accurate electronic structure calculations (CASSCF/CASPT2), has been proposed to account for the mechanism of phot...
