采用多尺度量子化学方法模拟了碳纳米管阵列的场发射特性.碳纳米管镜像势的作用可以等效地用原子尺寸的理想金属球的镜像势来代替.模拟计算结果表明,考虑了镜像势作用后的碳纳米管阵列发射电流密度比没有考虑镜像势的结果增大了约6倍.
A multi-scale quantum chemistry method is used to study field emission from arrays of carbon nanotubes. The image potential is effectively given by the image potential of an ideal metal sphere with atomic size. When the image potential is included, the field emission current density is 6 times stronger than the results without considering the image potential.