Electrons Transmission Through Carbon Nanotubes

We conducted experiments in which 1500 eV and 200 eV electrons passed through carbon nanotubes films respectively,analyzed the two-dimensional angular distribution and energy spectrum of transmitted electrons,and studied the interaction between electrons and carbon nanotubes.Before the experiment,an electron gun with LaB6 filament was designed and assembled,and an experimental platform was built based on this electron gun,which could generate the initial electron beam of 0-5000 ev.The carbon nanotubes films used in the experiment are composed of a large number of single-walled carbon nanotubes about 83-89?m long arranged vertically.For the test method,a two-dimensional imaging system based on MCP is used to detect the two-dimensional angular distribution of transmitted electrons.An energy detection system composed of spherical spectrometer and MCP is used to study the energy spectrum of transmitted electrons.By analyzing the experimental data,we found that carbon nanotubes can transport low energy electrons at 200 eV and 1500 eV without losing energy.Carbon nanotubes have no guiding effect on electrons,and the divergence Angle center of transmitted electrons will move slightly with the inclination Angle,but it is always within plus or minus 1° of the incident electron direction.For get higher electron transmittance need the incidence Angle of the higher incident electron energy closer to zero.There are no charge and discharge phenomena in the process of electrons passing through carbon nanotubes.These results are helpful for the study of the interaction between electrons and conductive materials.