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公开(公告)号：US07692116B1
公开(公告)日：2010-04-06
申请号：US10188525
申请日：2002-07-03
IPC分类号： B23K26/12
CPC分类号： C23C14/0605 , B82Y30/00 , B82Y40/00 , C01B32/162 , C01B2202/02 , C23C14/228 , C23C14/28 , C23C14/541
摘要： Single walled carbon nanotubes are produced in a novel apparatus by the laser-induced ablation of moving carbon target. The laser used is of high average power and ultra-fast pulsing. According to various preferred embodiments, the laser produces an output above about 50 watts/cm2 at a repetition rate above about 15 MHz and exhibits a pulse duration below about 10 picoseconds. The carbon, carbon/catalyst target and the laser beam are moved relative to one another and a focused flow of “side pumped”, preheated inert gas is introduced near the point of ablation to minimize or eliminate interference by the ablated plume by removal of the plume and introduction of new target area for incidence with the laser beam. When the target is moved relative to the laser beam, rotational or translational movement may be imparted thereto, but rotation of the target is preferred.
摘要翻译： 单壁碳纳米管通过激光诱导的移动碳靶的消融在新型装置中产生。 使用的激光器具有高平均功率和超快速脉冲。 根据各种优选实施例，激光器以高于约15MHz的重复频率产生大于约50瓦特/平方厘米的输出，并且表现出低于约10皮秒的脉冲持续时间。 碳，碳/催化剂靶和激光束相对于彼此移动，并且在消融点附近引入预热的惰性气体的聚焦流动，以最小化或消除被消除的羽流的干扰， 羽流和引入新的目标区域与激光束的入射。 当目标相对于激光束移动时，可以赋予旋转或平移运动，但是靶的旋转是优选的。
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公开(公告)号：US08317983B1
公开(公告)日：2012-11-27
申请号：US12798377
申请日：2010-04-02
IPC分类号： B01J19/12
CPC分类号： C23C14/0605 , B82Y30/00 , B82Y40/00 , C01B32/162 , C01B2202/02 , C23C14/228 , C23C14/28 , C23C14/541
摘要： Single walled carbon nanotubes are produced in a novel apparatus by the laser-induced ablation of moving carbon target. The laser used is of high average power and ultra-fast pulsing. According to various preferred embodiments, the laser produces and output above about 50 watts/cm2 at a repetition rate above about 15 MHz and exhibits a pulse duration below about 10 picoseconds. The carbon, carbon/catalyst target and the laser beam are moved relative to one another and a focused flow of “side pumped”, preheated inert gas is introduced near the point of ablation to minimize or eliminate interference by the ablated plume by removal of the plume and introduction of new target area for incidence with the laser beam. When the target is moved relative to the laser beam, rotational or translational movement may be imparted thereto, but rotation of the target is preferred.
摘要翻译： 单壁碳纳米管通过激光诱导的移动碳靶的消融在新型装置中产生。 使用的激光器具有高平均功率和超快速脉冲。 根据各种优选实施例，激光器以高于约15MHz的重复频率产生并输出高于约50瓦特/平方厘米，并且表现出低于约10皮秒的脉冲持续时间。 碳，碳/催化剂靶和激光束相对于彼此移动，并且在消融点附近引入侧面泵送的预热惰性气体的聚焦流，以通过去除羽流来最小化或消除被消融的羽流的干扰， 用激光束引入新的目标区域入射。 当目标相对于激光束移动时，可以赋予旋转或平移运动，但是靶的旋转是优选的。
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