A method of forming emitters and a method of manufacturing a Field Emission Device (FED) using the method includes: forming a volume-changeable structure on an electrode, the volume-changeable structure composed of a polymer which reversibly swells and shrinks in response to an external stimulus; injecting an electron-emitting material into the volume-changeable structure; aligning the electron-emitting material; and removing the polymer to form the emitters.

 
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