A study on field emission patterns of single-walled carbon nanotubes

作者：Zhang ZX^*; Hou SM; Zhao XY; Zhang H; Sun JP; Liu WM; Xue ZQ; Shi ZJ; Gu ZN

来源：Acta Physica Sinica, 2002, 51(2): 434-438.

• single-walled carbon nanotubes
• field emission microscopy (FEM)
• quadruple mass spectrum

Field emission patterns of single-walled carbon nanotubes (SWCNTs) were studied using the field emission microscopy (FEM) Mass spectra of desorbed residual gases were monitored with a quadruple mass spectrometer during processes of thermal treatment. After SWCNTs were treated at about 1000degreesC, the obtained field emission patterns were possibly atomically resolved, which might be produced by a (16,0) zigzag SWCNT without cap. Results of mass spectra indicated that oxygen and carbon atoms were mainly released from the polycrystal tungsten tip at higher temperatures. The ends of SWCNTs could be modified by these atoms,which might be the reason that these field emission patterns of SWCNTs could be observed.

• 出版日期2002-2
• 单位北京大学