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Cathode-Ray Lighting Elements

Carbon nano materials- field emitters.

Triod type design.

Early models Cylindrical rods with MWNTs were cut ithindisks and were glued to stainless steel plates by sil

paste.

Later models Nano tubes are screen printed on to tmetalplates.

Luminance of hos hor screen 6.4 * 104 cd cm2

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Flat Panel Display

Demonstration structure constructed at NorthwesteUniversity

Nanotube-epoxy stripes on the cathode glass plate

Phosphor-coated Indium-Tin-Oxide (ITO) stripes on theanode plate

Pixels are formed at the intersection of cathode aanode

stripes. At a cathode-anode gap distance of 30 m, 230current density.

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Half-voltage off-pixel scheme. Pulses of 150V areswitchedamong anode and cathode stripes,

Samsung has fabricated 4.5-inch diode-type fieldemission

display with SWNT stripes on the cathode and

phosphor-coatedITO stripes on the anode.

SWNTs synthesized by the arc-discharge method weredispersedin isopropyl alcohol and then mixed with an organic

mixture ofnitro cellulose.

Paste was squeezed into soda lime glasses through a

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Energy Storage Applications

Graphite, carbonaceous materials and carbon fiberelectrodes havebeen used for decades in fuel cells, battery and severalother electrochemical applications.

Efficiency of fuel cells and this depends on variousfactors, such asthe structure and morphology of the carbon material

used inthe electrodes.

The electron transfer kinetics take place fastest on

nanotubes thanin conventional carbon electrodes.

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Hydrogen Storage

Metal hydrides and cryo-adsorption are the tcommonly usedmeans to store hydrogen, typically at high pressureand/or low temperature. In metal hydrides, hydrogen

reversiblystored in the interstitial sites of the host lattice.

Hydrogen can also be stored in the gas phase in t

metal hydrides.Because of their cylindrical and hollow geometry, andnanometer-scale diameters, it has been predicted th

thecarbon nanotubes can store liquid and gas in the inn

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Higher hydrogen uptake, up to 1420wt%, at 20400under

ambient pressure was reported in alkali metintercalated

carbon nanotubes.

Many experiments are performed on SWNT containimaterials.Still

it is not clear whether carbon nanotubes will have realtechnological applications in the hydrogen stora

application area.

Carbon nanotubes readil absorb other aseous s ecie

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Filled composites

Carbon fibers have 50 times the specific strength of

steel.

They are excellent load bearing reinforcements incomposites due to their high strength.

Use of SWNT is preferred to MWNTs in composites.

Nanotubes sustain large strains (40%) in tension withoushowing thesigns of fracture.Nanotube filled ceramics withstand high temperature.

Using Nanotubes for structural polymer compositesincreases the toughness of the composites by absorbing

energy during their highly flexible elastic behavior.

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