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14 条记录 (耗时 0.018 秒)

    Laser ablation for the synthesis of carbon nanotubes
    1.
    发明授权
    Laser ablation for the synthesis of carbon nanotubes 失效
    用于合成碳纳米管的激光烧蚀

    公开(公告)号：US07692116B1

    公开(公告)日：2010-04-06

    申请号：US10188525

    申请日：2002-07-03

    申请人： Brian C. Holloway ,  Peter C. Eklund ,  Michael W. Smith ,  Kevin C. Jordan ,  Michelle Shinn

    发明人： Brian C. Holloway ,  Peter C. Eklund ,  Michael W. Smith ,  Kevin C. Jordan ,  Michelle Shinn

    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。

    Method for low temperature synthesis of single wall carbon nanotubes
    3.
    发明授权
    Method for low temperature synthesis of single wall carbon nanotubes 失效
    单壁碳纳米管的低温合成方法

    公开(公告)号：US07338648B2

    公开(公告)日：2008-03-04

    申请号：US10326276

    申请日：2002-12-23

    申请人： Avetik Harutyunyan ,  Bhabendra K. Pradhan ,  Peter C. Eklund

    发明人： Avetik Harutyunyan ,  Bhabendra K. Pradhan ,  Peter C. Eklund

    IPC分类号： B82B3/00

    CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/162 ,  C01B2202/02 ,  D01F9/1272 ,  Y10S977/843

    摘要： The present invention is directed towards a method of producing single wall carbon nanotubes which comprises providing a catalyst comprising an alumina support and a component selected from the group consisting of reduced Fe, reduced Fe/Mo, Fe oxide, and Fe/Mo oxide, and growing, in an inert atmosphere, single wall carbon nanotubes by passing a gas comprising methane over the catalyst at a temperature and for a time sufficient to grow single wall carbon nanotubes. The invention is also directed towards a single wall carbon nanotube produced by such a method. The invention is also directed towards a catalyst for producing SWNTs, wherein the catalyst comprises an alumina support and a component selected from the group consisting of reduced Fe, reduced Fe/Mo, Fe oxide, and Fe/Mo oxide.

    摘要翻译： 本发明涉及一种制备单壁碳纳米管的方法，其包括提供包含氧化铝载体和选自还原Fe，还原Fe / Mo，Fe氧化物和Fe / Mo氧化物的组分的催化剂，以及 在惰性气氛中通过在包含甲烷的气体在催化剂上经过足以使单壁碳纳米管生长的温度和时间内使单壁碳纳米管生长。 本发明还涉及通过这种方法制备的单壁碳纳米管。 本发明还涉及用于制备SWNT的催化剂，其中催化剂包含氧化铝载体和选自还原Fe，还原Fe / Mo，Fe氧化物和Fe / Mo氧化物的组分。

    Boron-Doped Single-Walled Nanotubes(SWCNT)
    9.
    发明申请
    Boron-Doped Single-Walled Nanotubes(SWCNT) 审中-公开
    硼掺杂单壁纳米管（SWCNT）

    公开(公告)号：US20100219383A1

    公开(公告)日：2010-09-02

    申请号：US12530369

    申请日：2008-03-07

    申请人： Peter C. Eklund

    发明人： Peter C. Eklund

    IPC分类号： H01B1/04 ,  C01B31/36 ,  B05D1/02

    CPC分类号： B82Y40/00 ,  B82Y10/00 ,  B82Y30/00 ,  C01B32/162 ,  C01B2202/02 ,  H01L51/0048

    摘要： The present invention generally relates to methods and apparatus for the synthesis or preparation of boron-doped single-walled carbon nanotubes (B-SWCNTs). The invention provides a high yield, single step method for producing large quantities of continuous macroscopic carbon fiber from single-wall carbon nanotubes using inexpensive carbon feedstocks wherein the carbon nanotubes are produced by in situ boron substitutional doping. In one embodiment, the nanotubes disclosed are used, singularly or in multiples, in power transmission cables, in solar cells, in batteries, as antennas, as molecular electronics, as probes and manipulators, and in composites. It is another object of this invention to provide macroscopic carbon fiber made by such a method.

    摘要翻译： 本发明一般涉及用于合成或制备硼掺杂单壁碳纳米管（B-SWCNT）的方法和装置。 本发明提供了一种高产率的单步法，用于使用廉价的碳原料从单壁碳纳米管制备大量的连续宏观碳纤维，其中碳纳米管是通过原位硼取代掺杂生产的。 在一个实施例中，公开的纳米管单独地或多次地用于输电电缆，太阳能电池，电池，天线，分子电子学，探针和操纵器以及复合材料中。 本发明的另一个目的是提供由这种方法制成的宏观碳纤维。