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44 条记录 (耗时 0.03 秒)

    Method for cutting single-wall carbon nanotubes through fluorination
    13.
    发明授权
    Method for cutting single-wall carbon nanotubes through fluorination 失效
    通过氟化法切割单壁碳纳米管的方法

    公开(公告)号：US07029646B2

    公开(公告)日：2006-04-18

    申请号：US10408886

    申请日：2003-04-08

    申请人： John L. Margrave ,  Zhenning Gu ,  Robert H. Hauge ,  Richard E. Smalley

    发明人： John L. Margrave ,  Zhenning Gu ,  Robert H. Hauge ,  Richard E. Smalley

    IPC分类号： D01F9/12

    CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C01B32/176 ,  C01B2202/02

    摘要： A method for cutting single-wall carbon nanotubes involves partially fluorinating single-wall carbon nanotubes and pyrolyzing the partially fluorinated nanotubes in an inert atmosphere or vacuum up to about 1000° C. The nanotubes are optionally purified before cutting. The partial fluorination involves fluorinating the nanotubes to a carbon-fluorine stoichiometry of CFx, where x is up to about 0.3. The invention also relates to the derivatization of fluorinated and cut single-wall carbon nanotubes. The single-wall carbon nanotubes can be cut to any length depending on the fluorination and pyrolysis conditions. Short nanotubes are useful in various applications, such as field emitters for flat panel displays and as “seeds” for further nanotube growth.

    摘要翻译： 用于切割单壁碳纳米管的方法涉及部分氟化单壁碳纳米管并在惰性气氛或真空中高达约1000℃热解部分氟化的纳米管。在切割之前，任选地提纯纳米管。 部分氟化涉及将纳米管氟化为CF x的碳氟化学计量，其中x为约0.3。 本发明还涉及氟化和切割的单壁碳纳米管的衍生化。 根据氟化和热解条件，可以将单壁碳纳米管切割成任何长度。 短纳米管在各种应用中是有用的，例如用于平板显示器的场发射器和用于进一步的纳米管生长的“种子”。

    Process utilizing pre-formed cluster catalysts for making single-wall carbon nanotubes
    14.
    发明授权
    Process utilizing pre-formed cluster catalysts for making single-wall carbon nanotubes 有权
    使用预先形成的簇催化剂制备单壁碳纳米管的方法

    公开(公告)号：US06913789B2

    公开(公告)日：2005-07-05

    申请号：US10059570

    申请日：2002-01-29

    申请人： Richard E. Smalley ,  Robert H. Hauge ,  Peter Athol Willis ,  W. Carter Kittrell

    发明人： Richard E. Smalley ,  Robert H. Hauge ,  Peter Athol Willis ,  W. Carter Kittrell

    IPC分类号： B01J3/00 ,  B01J19/26 ,  C01B31/02 ,  D01F9/127 ,  C23C16/26

    CPC分类号： B82Y30/00 ,  B01J3/008 ,  B01J19/26 ,  B01J2219/00085 ,  B01J2219/00094 ,  B01J2219/00108 ,  B01J2219/00121 ,  B82Y40/00 ,  C01B32/162 ,  C01B2202/02 ,  D01F9/127 ,  Y02P20/544 ,  Y10S977/843

    摘要： A gas-phase method for producing high yields of single-wall carbon nanotubes with high purity and homogeneity is disclosed. The method involves using preformed metal catalyst clusters to initiate and grow single-wall carbon nanotubes. In one embodiment, multi-metallic catalyst precursors are used to facilitate the metal catalyst cluster formation. The catalyst clusters are grown to the desired size before mixing with a carbon-containing feedstock at a temperature and pressure sufficient to initiate and form single-wall carbon nanotubes. The method also involves using small fullerenes and preformed sections of single-wall carbon nanotubes, either derivatized or underivatized, as seed molecules for expediting the growth and increasing the yield of single-wall carbon nanotubes. The multi-metallic catalyst precursors and the seed molecules may be introduced into the reactor by means of a supercritical fluid. In addition the seed molecules may be introduced into the reactor via an aerosol or smoke.

    摘要翻译： 公开了一种用于产生高纯度和均匀性的高产率单壁碳纳米管的气相方法。 该方法涉及使用预制金属催化剂簇来引发和生长单壁碳纳米管。 在一个实施方案中，多金属催化剂前体用于促进金属催化剂簇形成。 在与含碳原料混合之前，在足以引发和形成单壁碳纳米管的温度和压力下将催化剂簇生长至所需尺寸。 该方法还涉及使用衍生化或未衍生化的单壁碳纳米管的小富勒烯和预制部分作为种子分子，用于加速生长并提高单壁碳纳米管的产率。 可以通过超临界流体将多金属催化剂前体和种子分子引入反应器。 此外，可以通过气溶胶或烟雾将种子分子引入反应器。

    Process for purifying single-wall carbon nanotubes and compositions thereof
    15.
    发明授权
    Process for purifying single-wall carbon nanotubes and compositions thereof 有权
    单壁碳纳米管纯化方法及其组合物

    公开(公告)号：US06752977B2

    公开(公告)日：2004-06-22

    申请号：US10068907

    申请日：2002-02-08

    申请人： Richard E. Smalley ,  Robert H. Hauge ,  Wan-Ting Chiang

    发明人： Richard E. Smalley ,  Robert H. Hauge ,  Wan-Ting Chiang

    IPC分类号： D01F912

    CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/17 ,  C01B2202/02 ,  D01F9/1278 ,  D01F11/121 ,  Y10S977/75 ,  Y10S977/845

    摘要： The present invention relates to a process for the purification of single-wall carbon nanotubes and the purified single-wall carbon nanotube material. Known methods of single-wall carbon nanotube production result in a single-wall carbon nanotube product that contains single-wall carbon nanotubes in addition to impurities including residual metal catalyst particles and amounts of small amorphous carbon sheets that surround the catalyst particles and appear on the sides of the single-wall carbon nanotubes and “ropes” of single-wall carbon nanotubes. The purification process removes the extraneous carbon as well as metal-containing residual catalyst particles. The process employs steps including a gas-phase oxidation of the amorphous carbon and subsequent liquid-phase reaction of a halogen-containing acid with the metal-containing species. Optionally, the single-wall carbon nanotube material may be annealed dry or in the presence of moisture. The present invention provides a scalable means for producing high-purity single-wall carbon nanotube material.

    摘要翻译： 本发明涉及纯化单壁碳纳米管和纯化的单壁碳纳米管材料的方法。 单壁碳纳米管生产的已知方法导致单壁碳纳米管产物，除了包含残留金属催化剂颗粒的杂质和围绕催化剂颗粒的小的无定形碳片的含量之外，还包含单壁碳纳米管，并出现在 单壁碳纳米管的侧面和单壁碳纳米管的“绳索”。 净化过程除去外来碳以及含金属的残留催化剂颗粒。 该方法采用包括无定形碳的气相氧化和随后的含卤素酸与含金属物质的液相反应的步骤。 任选地，单壁碳纳米管材料可以是干燥的或在水分存在下退火的。 本发明提供了用于生产高纯度单壁碳纳米管材料的可伸缩手段。

    Process for making single-wall carbon nanotubes utilizing refractory particles
    19.
    发明授权
    Process for making single-wall carbon nanotubes utilizing refractory particles 有权

    公开(公告)号：US07138100B2

    公开(公告)日：2006-11-21

    申请号：US10300135

    申请日：2002-11-20

    申请人： Richard E. Smalley ,  Robert H. Hauge

    发明人： Richard E. Smalley ,  Robert H. Hauge

    IPC分类号： D01C5/00

    CPC分类号： B82Y30/00 ,  D01F9/1278 ,  Y10S977/842

    摘要： A continuous gas-phase method for producing single-wall carbon nanotubes at high catalyst productivity and high yield is disclosed. The method involves the use of a novel in-situ formed catalyst to initiate and grow single-wall carbon nanotubes using a carbon-containing feedstock in a high temperature and pressure process. The catalyst comprises in-situ-generated transition metal particles in contact with in-situ-generated refractory particles. The population of nucleating sites for single-wall carbon nanotubes is enhanced due to the ease of formation of a population of refractory particles. These, in turn, improve the nucleation and stability of the transition metal particles that grow on them. The larger number of transition metal particles translate into a larger number of sites for single-wall carbon nanotube production. The higher catalyst yields provide a means for obtaining higher purity single-wall carbon nanotubes.