Abstract
This chapter provides a representative overview of the present status of flexible field emitters based on carbon nanotubes (CNTs), with a special emphasis on recent development. This development has been considered in the context of preparation methods of flexible emitters and their electron emission properties, with the focus on CNT-based emitters. The brief description of the basic and general principle of field emission is given and field emission properties of CNTs are outlined. A lot of effort and progress has been made during the past decade in the preparation and characterization of the flexible field emitter arrays (FEAs) based on CNTs and other materials. In addition, the flexible field emitters, especially CNT-based emitters, have developed into a new research field. Several strategies, such as attachment, composite/matrix and direct growth methods, have been successfully developed for CNT flexible emitters and have exhibited considerable electron emission properties.
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