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利用场发射显微镜 (FEM)和四极质谱计分别研究了经过热处理的单壁碳纳米管的场发射图像和热处理过程中样品脱附的残气质谱 .当热处理温度达到 10 0 0℃左右时得到了单壁碳纳米管的场发射像 ,此像可能是顶端开口的单根 (16 ,0 )锯齿形单壁碳纳米管的具有原子可分辨的场发射图像 .四极质谱分析结果表明 ,在此温度范围W针尖晶粒间隙中有O原子和C原子释放出来 .它们对单壁碳纳米管顶端的修饰是我们能观察到这些碳纳米管场发射像的可能原因 .
Field emission images of the heat-treated single-walled carbon nanotubes and the GC-MS of the sample desorbed during the heat treatment were respectively investigated by using a field emission microscope (FEM) and a quadrupole mass spectrometer. When the heat treatment temperature reached about 100 ° C, The field emission image of single-walled carbon nanotubes, which may be the atomically resolvable field emission image of a single (16, 0) zigzag single-walled carbon nanotube with an open top, results from quadrupole mass spectrometry In this temperature range, O atoms and C atoms are released in the tip-gap, and their modification of single-walled carbon nanotube tips is a possible reason for the observed emission of these carbon nanotubes.