Fabrication and the enhanced emission uniformity of carbon nanofibers using a glass cap

摘要

Uniformity is one of the most important qualifications for reliable field emission devices based on carbon nanofibers (CNFs). We synthesized CNFs by thermal chemical vapor deposition at 600 degrees C on the glass substrate, promising practical large-area applications. A glass cap was introduced to enhance the uniformity of CNF emitters vertically grown under the guidance of micro-grooves, which provided passages for the diffusion of precursor gas to CNF growth sites. Our CNFs, vertically leveled by the glass cap with the support of the micro-grooves, and without any post-treatments, showed excellent uniformity in field emission as well as long-term stability.