Preparation method for grapheme/zinc oxide/grapheme sandwich structure composite cathode materials for field emission
A technology of ene sandwich and composite cathode, which is applied in nanotechnology for materials and surface science, cold cathode manufacturing, discharge tube/lamp manufacturing, etc., can solve the problem of stability and controllability of directional ZnO nanoneedle arrays Mature, insufficient understanding of the influence law, field enhancement factor reduction and other problems, to achieve the effect of excellent field emission performance, low emission opening field strength, and low emission performance
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Embodiment 1
[0038] Such as figure 1As shown, measure 33.33ml of analytically pure 1,2-propanediol with a mass percentage of 99.5% and 66.67ml of analytically pure ethanol with a mass percentage of 99.8%, and mix the two fully to obtain 1,2-propanediol and 100ml of a mixed solution with an absolute ethanol volume ratio of 1:2, 0.05mmol mass percentage of 99% analytically pure graphene oxide powder was dissolved in the mixed solution, and after ultrasonic stirring for 1h, an electrostatic spray deposition (ESD) was obtained. Suspend the precursor solution; then fix the N-type monocrystalline silicon polished wafer (silicon polishing with a resistivity of 3) on the substrate splint, heat the substrate temperature to 100°C, and adjust the capillary nozzle of the ESD device and the substrate The distance between them is 5cm, and the DC voltage is 12kV. Add the prepared ESD precursor liquid to the ESD device, set the spray speed of the ESD device to 600ml / h, turn on the switch, and the ESD dev...
Embodiment 2
[0041] Such as figure 1 As shown, measure 50ml of analytically pure 1,2-propanediol with a mass percentage of 99.5% and 50ml of analytically pure absolute ethanol with a mass percentage of 99.8%, and mix the two thoroughly to obtain 1,2-propanediol and anhydrous The volume ratio of ethanol is 100ml of the mixed solution of 1:1, and 0.03mmol mass percent of 99% analytically pure graphene oxide powder is dissolved in the mixed solution, and after ultrasonic stirring for 1.5h, a suspension for electrostatic spray deposition (ESD) is obtained. Precursor solution; then N-type single crystal silicon polishing sheet (resistivity 8.1 light sheet () is fixed on the substrate splint, the substrate temperature is heated to 150 ° C, and the capillary nozzle of the ESD device is adjusted to the substrate The distance between them is 6cm, and the DC voltage is 11kV. Add the prepared ESD precursor liquid to the ESD device, set the spray speed of the ESD device to 650ml / h, turn on the switch...
Embodiment 3
[0044] Such as figure 1 As shown, measure 33.33ml of analytically pure 1,2-propanediol with a mass percentage of 99.5% and 66.67ml of analytically pure ethanol with a mass percentage of 99.8%, and mix the two fully to obtain 1,2-propanediol and 100ml of a mixed solution with an absolute ethanol volume ratio of 1:2, 0.02mmol mass percentage of 99% analytically pure graphene oxide powder was dissolved in the mixed solution, and after ultrasonic stirring for 1h, an electrostatic spray deposition (ESD) was obtained. Suspend the precursor solution; then fix the N-type monocrystalline silicon polished sheet (with a resistivity of 5.8) on the substrate splint, heat the substrate to 200°C, and adjust the capillary nozzle and lining of the ESD device The distance between the bottoms is 6cm, and the DC voltage is 10kV. Add the prepared ESD precursor liquid to the ESD device, set the spray speed of the ESD device to 700ml / h, turn on the switch, and the ESD device starts to spray the ESD...
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