Spark light radiation coupled with the field electron emission from carbon nanotube forests

作者：Zakhidov Al A; Nanjundaswamy R; Zhang M; Lee S B; Obraztsov A N; Cunningham A; Zakhidov A A

来源：Journal of Applied Physics, 2006, 100(4): 044327.

DOI：10.1063/1.2335780

The phenomenon of field emission accompanied by light emission (LE) from oriented multiwalled carbon nanotube arrays was investigated. Transient (i.e., sparklike) in nature, the LE spectral profile consisted atomic carbon and iron transitions superimposed on a visible and near infrared continuum. The exact blend of line and continuum contributions varied with the magnitude and nature [direct current (dc) or pulsed regime] of the applied voltage. Adopting a blackbody description of the continuum radiation yielded a local temperature between 2500 K for pulsed excitation and 3100 K for dc voltage excitation. A mechanism involving the evaporation of Fe catalyst clusters is proposed to explain the differences in the emission profiles and inferred blackbody temperatures for the two voltage regimes.

• 出版日期2006-8-15