Method for forming tip for carbon nanotube and method for forming field emission structure having the same
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsPeng Liu, Duan-Liang Zhou, Shou-Shan Fan
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Abstract
A method for forming a tip for a carbon nanotube wire is introduced. The method includes the following steps. A carbon nanotube wire is provided. A laser beam irradiates the carbon nanotube wire until the carbon nanotube wire is broken off such that the carbon nanotube wire forms a taper-shaped tip. A scan power of the laser beam is in a range from about 1 watt to about 10 watts. A scan speed of the laser beam is equal to or less than 200 millimeters per second.
Claims20
A method for forming a tip for a carbon nanotube wire, the method comprising:
- providing a carbon nanotube wire;
- and
- irradiating the carbon nanotube wire by a laser beam until the carbon nanotube wire is broken off such that the carbon nanotube wire forms a taper-shaped tip,
- wherein a scan power of the laser beam is in a range from about 1 watt to about 10 watts, and a scan speed of the laser beam is equal to or less than 200 millimeters per second.
A method for forming a plurality of tips for a plurality carbon nanotube wires, the method comprising:
- providing a plurality of carbon nanotube wires;
- and
- irradiating the plurality of carbon nanotube wires along a predetermined path, by a laser beam until the plurality of carbon nanotube wires are broken off such that each of the carbon nanotube wires forms a taper-shaped tip,
- wherein a scan power of the laser beam is in a range from about 1 watt to about 10 watts, and a scan speed of the laser beam is equal to or less than 200 millimeters per second.
A method for forming a field emission structure, comprising steps of:
- providing a first electrode, and a second electrode spaced from the first electrode, and a carbon nanotube wire having two ends;
- fixing the two ends of the carbon nanotube wire to the first electrode and the second electrode, respectively;
- and
- irradiating the carbon nanotube wire by a laser beam until the carbon nanotube wire is broken off such that the carbon nanotube wire forms a taper-shaped tip,
- wherein a scan power of the laser beam is in a range from about 1 watt to about 10 watts, and a scan speed of the laser beam is equal to or less than 200 millimeters per second.
Dependencies are inferred from the claim text.