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Gold nanoparticle thin film wrapped by organic ligand and field electron emission device of gold nanoparticle thin film

A gold nanoparticle, organic ligand technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing and other directions, can solve the problems of poor emission electron monochromaticity, difficult to self-assemble monolayer film in large area, complicated preparation conditions, etc. Large emission area, convenient preparation method, and good monochromatic performance

Active Publication Date: 2014-12-03
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Usually, materials that enhance electron emission are wide-bandgap materials, such as diamond crystals, diamond molecules, etc. The main feature of this type of material is that its conduction band energy level is above its vacuum energy level, so it has a strong electron repulsion force. For example, the inventors of US 2008 / 0191598A1, Shen et al., used self-assembled monolayer adamantane grown on a gold or silver film substrate to increase its electron emission capability and monochromaticity of emitted electron beams. Its main feature is the use of self-assembled The monolayer adamantane improves the energy band structure of the substrate and emits high-intensity monochromatic electron beams, but the monolayer adamantane is self-assembled on a metal (such as gold or silver) substrate by evaporation deposition, and its preparation The conditions are relatively complicated, expensive high-vacuum equipment is required, it is not easy to form a large-area self-assembled monolayer film, and its monochromaticity of electron emission is poor (energy broadening is within 500meV), which is far from satisfying various technical alignment monochromatic Electron Source Requirements

Method used

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  • Gold nanoparticle thin film wrapped by organic ligand and field electron emission device of gold nanoparticle thin film
  • Gold nanoparticle thin film wrapped by organic ligand and field electron emission device of gold nanoparticle thin film
  • Gold nanoparticle thin film wrapped by organic ligand and field electron emission device of gold nanoparticle thin film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Dilute 1ml of 10% chloroauric acid to 10ml of 1% chloroauric acid, add 24ml of toluene, and stir rapidly for 10min; 2) then pour 400mg of phase transfer reagent tetraoctylammonium bromide into step 1) to obtain In the solution, the toluene phase turns into dark orange, stir rapidly for 5-7min, and separate the toluene phase with a separatory funnel; 3) add a toluene solution containing 18 mg of mercaptoundecanoic acid to the toluene phase, and then add 5 mg / ml of Sodium borohydride solution (the total amount of sodium borohydride added in the whole process is 115mg), the toluene phase immediately turns dark brown, and stirs at high speed for 2-3h; 4) Wash the solution 3) obtained in step 3) with 25ml of deionized water, respectively. 5 times, the water phase in the solution was separated; 5) Pour the washed toluene phase into a 50ml round bottom flask, and after rotary evaporation at 55°C for 10-20min, a layer of black waxy initial product was obtained around the bott...

Embodiment 2

[0041] 1) Dilute 3ml of 10% chloroauric acid to 30ml of 1% chloroauric acid, add 24ml of toluene, and stir rapidly for 10min; 2) then pour 420mg of phase transfer reagent tetraoctylammonium bromide into step 1) to obtain In the solution, the toluene phase turns into dark orange, stir rapidly for 5-7min, and separate the toluene phase with a separatory funnel; 3) add a toluene solution containing 27 mg of mercaptoundecanoic acid to the toluene phase, and then add 5 mg / ml of Sodium borohydride solution (the total amount of sodium borohydride added in the whole process is 125mg), the toluene phase immediately turns dark brown, and stirred at high speed for 2-3h; 4) Wash the solution 3) obtained in step 3) with 25ml of deionized water respectively. 5 times, the water phase in the solution was separated; 5) Pour the washed toluene phase into a 50ml round bottom flask, and after rotary evaporation at 55°C for 10-20min, a layer of black waxy initial product was obtained around the bot...

Embodiment 3

[0043] 1) Dilute 2ml of 10% chloroauric acid to 20ml of 1% chloroauric acid, add 24ml of toluene, and stir rapidly for 10min; 2) then pour 350mg of phase transfer reagent tetraoctylammonium bromide into step 1) to obtain In the solution, the toluene phase turns into dark orange, stir rapidly for 5-7min, and separate the toluene phase with a separatory funnel; 3) add a toluene solution containing 4.5 mg mercaptoundecanoic acid to the toluene phase, and then add 5 mg / ml Sodium borohydride solution (the total amount of sodium borohydride added in the whole process is 105 mg), the toluene phase immediately turns dark brown, and stirred at high speed for 2-3h; 4) Wash the solution 3 obtained in step 3) with 25 ml of deionized water respectively -5 times, separate the water phase in the solution; 5) Pour the washed toluene phase into a 50ml round bottom flask, and after rotary evaporation at 55°C for 10-20min, a layer of black waxy initial product is obtained around the bottom of the...

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Abstract

The invention provides a gold nanoparticle thin film wrapped by an organic ligand and a field electron emission device of the gold nanoparticle thin film. The gold nanoparticle thin film has a superlattice structure taking gold nanoparticles wrapped by the organic ligand and of 1.3-1.7nm in particle diameter as elements. Electrons are provided through the gold nanoparticles, electron emission is enhanced through the organic ligand with low electron affinity, and the gold nanoparticle thin film is taken as an electron emission source to emit electron beams which are uniform, high in strength and quasi-monochromatized under low voltage bias. The gold nanoparticle thin film has the advantages of large emission area, high emission strength, good monochromatic performance and the like; expensive vacuum equipment is not needed, so that a preparation method is economical, convenient and quick.

Description

technical field [0001] The invention relates to an organic ligand-wrapped gold nano particle film and a field electron emission device thereof. Background technique [0002] The phenomenon of electron emission is widely used in various fields of social life, from radio communication, X-ray tube, TV, microwave equipment to electron exposure machine, electron microscope, evaporation coating equipment, etc., are closely related to the phenomenon of electron emission. At present, commonly used electron emission sources are mainly divided into thermal emission electron sources and field emission electron sources. Thermal emission electron sources mainly include tungsten filament and LaB 6 Crystals, etc., the monochromaticity of the electrons emitted by them is relatively poor (the energy divergence is usually 1.5-2.3eV), and has the disadvantages of slow response, high energy consumption, and difficulty in integration, which greatly limits the application in the field of electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00H01J29/04
Inventor 高兴宇杨迎国冯尚蕾王菲王鹏
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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