Study on Photoemission of Patterned Carbon Nanotubes Modified with Gold Nanoparticles

Employing the edge effect and localized surface plasmon resonance effect, an enhanced photoemission is obtained from a carbon nanotube (CNT) arrays modified with gold nanoparticles. Compared with the unpatterned CNTs, the quantum efficiency of patterned CNTs is improved from 3.69×10
^-6
to 1.85×10
^-5
. After modification with gold nanoparticles, the quantum efficiency of patterned CNTs is further raised to 4.98×10
^-5
. This work makes CNTs as a promising material for the high stability and high efficiency photocathode.