Sentences with phrase «field emission»

«A novel approach for high performance field emission electron sources.»

«We have found that a cathode with highly crystalline single - walled carbon nanotubes and an anode with the improved phosphor screen in our diode structure obtained no flicker field emission current and good brightness homogeneity,» Shimoi said.

Field emission of electrons from individually mounted carbon nanotubes has been found to be dramatically enhanced when the nanotube tips are opened by laser evaporation or oxidative etching.

That means field emission sources require much less power to operate and produce a much more directional and easily controllable stream of electrons.

Under a strong electric field, the cathode emits tight, high - speed beams of electrons through its sharp nanotube tips — a phenomenon called field emission.

To determine the structural and chemical composition of the soft tissues Lindgren collected and see if the fossil sea turtle did have a dark colored shell, the researchers subjected the sample to a selection of high - resolution analytical techniques, including field emission gun scanning electron microscopy (FEG - SEM), transmission electron microscopy (TEM), in situ immunohistochemistry, time - of - flight secondary ion mass spectrometry (ToF - SIMS), and infrared (IR) microspectroscopy.

The simple manufacturing process may also be suitable for making catalysts, field emission transistors and components for solar cells and lithium - ion batteries, they said.

a heritage of leadership in field emission research dating to the post-WWII era..

Calculations for some gas - field emissions jumped by several hundred percent.

Field emission electron sources catch scientists» attention due to its ability to provide intense electron beams that are about a thousand times denser than conventional thermionic cathode (like filaments in an incandescent light bulb).

Furthermore, field emission current fluctuation, which is an important factor in comparing luminance devices too, has a good stability in a simple diode panel.

To stay in that exact spot, the craft will use a field emission electric propulsion engine, which ejects ions of liquid metal cesium to exert a miniscule thrust to counter tiny forces on the craft, such as the sunlight itself.

However, metal electrode surfaces can cause a region of the vacuum to become conductive by injecting free electrons or ions through either field emission or thermionic emission.

Field emission electron sources can provide intense electron beams that are about a thousand times denser than conventional thermionic cathodes (like filaments in an incandescent light bulb).

She operates Carnegie's one - of - a-kind JEOL 8530 field emission electron microprobe, equipped with CL, five WDS spectrometers, two EDS detectors, a cold trap for high precision carbon analysis and Probe for EPMA software.

Here's one image from a field emission scanning electron microscope, showing what Hoover describes as features «interpreted as morphotypes of the cyanobacterium Calothrix spp.» (Journal of Cosmology):