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    Carbon nanotubes on a substrate
    1.
    发明授权
    Carbon nanotubes on a substrate 有权

    公开(公告)号：US06361861B1

    公开(公告)日：2002-03-26

    申请号：US09333876

    申请日：1999-06-14

    申请人： Yufei Gao ,  Jun Liu

    发明人： Yufei Gao ,  Jun Liu

    IPC分类号： D01F900

    摘要： The present invention includes carbon nanotubes whose hollow cores are 100% filled with conductive filler. The carbon nanotubes are in uniform arrays on a conductive substrate and are well-aligned and can be densely packed. The uniformity of the carbon nanotube arrays is indicated by the uniform length and diameter of the carbon nanotubes, both which vary from nanotube to nanotube on a given array by no more than about 5%. The alignment of the carbon nanotubes is indicated by the perpendicular growth of the nanotubes from the substrates which is achieved in part by the simultaneous growth of the conductive filler within the hollow core of the nanotube and the densely packed growth of the nanotubes. The present invention provides a densely packed carbon nanotube growth where each nanotube is in contact with at least one nearest-neighbor nanotube. The substrate is a conductive substrate coated with a growth catalyst, and the conductive filler can be single crystals of carbide formed by a solid state reaction between the substrate material and the growth catalyst. The present invention further provides a method for making the filled carbon nanotubes on the conductive substrates. The method includes the steps of depositing a growth catalyst onto the conductive substrate as a prepared substrate, creating a vacuum within a vessel which contains the prepared substrate, flowing H2/inert (e.g. Ar) gas within the vessel to increase and maintain the pressure within the vessel, increasing the temperature of the prepared substrate, and changing the H2/Ar gas to ethylene gas such that the ethylene gas flows within the vessel. Additionally, varying the density and separation of the catalyst particles on the conductive substrate can be used to control the diameter of the nanotubes.

    Method of making carbon nanotubes on a substrate
    2.
    发明授权
    Method of making carbon nanotubes on a substrate 有权
    在基材上制造碳纳米管的方法

    公开(公告)号：US07011771B2

    公开(公告)日：2006-03-14

    申请号：US09996523

    申请日：2001-11-28

    申请人： Yufei Gao ,  Jun Liu

    发明人： Yufei Gao ,  Jun Liu

    IPC分类号： H01J9/02 ,  H01J1/30 ,  D01F9/12 ,  C23C26/00

    CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/162 ,  C01B2202/08 ,  C01B2202/34 ,  C01B2202/36 ,  Y10S427/102 ,  Y10S977/742 ,  Y10S977/842 ,  Y10S977/843 ,  Y10T428/12438 ,  Y10T428/2913 ,  Y10T428/2918

    摘要： The present invention includes carbon nanotubes whose hollow cores are 100% filled with conductive filler. The carbon nanotubes are in uniform arrays on a conductive substrate and are well-aligned and can be densely packed. The uniformity of the carbon nanotube arrays is indicated by the uniform length and diameter of the carbon nanotubes, both which vary from nanotube to nanotube on a given array by no more than about 5%. The alignment of the carbon nanotubes is indicated by the perpendicular growth of the nanotubes from the substrates which is achieved in part by the simultaneous growth of the conductive filler within the hollow core of the nanotube and the densely packed growth of the nanotubes. The present invention provides a densely packed carbon nanotube growth where each nanotube is in contact with at least one nearest-neighbor nanotube. The substrate is a conductive substrate coated with a growth catalyst, and the conductive filler can be single crystals of carbide formed by a solid state reaction between the substrate material and the growth catalyst. The present invention further provides a method for making the filled carbon nanotubes on the conductive substrates. The method includes the steps of depositing a growth catalyst onto the conductive substrate as a prepared substrate, creating a vacuum within a vessel which contains the prepared substrate, flowing H2/inert (e.g. Ar) gas within the vessel to increase and maintain the pressure within the vessel, increasing the temperature of the prepared substrate, and changing the H2/Ar gas to ethylene gas such that the ethylene gas flows within the vessel. Additionally, varying the density and separation of the catalyst particles on the conductive substrate can be used to control the diameter of the nanotubes.

    摘要翻译： 本发明包括中空芯100％填充有导电填料的碳纳米管。 碳纳米管在导电衬底上是均匀的阵列，并且被很好地对准并且可以被密集地包装。 碳纳米管阵列的均匀性由碳纳米管的均匀长度和直径指示，两者在给定阵列上从纳米管到纳米管的变化不超过约5％。 碳纳米管的排列由纳米管从衬底的垂直生长表示，部分通过导电填料在纳米管的中空芯内的同时生长和纳米管的密集堆积生长而实现。 本发明提供了密集填充的碳纳米管生长，其中每个纳米管与至少一个最邻近的纳米管接触。 衬底是涂覆有生长催化剂的导电衬底，并且导电填料可以是通过衬底材料和生长催化剂之间的固态反应形成的碳化物单晶。 本发明还提供了一种在导电基板上制造填充的碳纳米管的方法。 该方法包括以下步骤：将生长催化剂沉积到导电基底上作为制备的基底，在容纳制备的基底的容器内产生真空，在容器内流动H 2 /惰性（例如Ar）气体，以增加和保持在 容器，提高制备的基材的温度，并将H 2 / Ar气体改变为乙烯气体，使得乙烯气体在容器内流动。 此外，改变导电基板上的催化剂颗粒的密度和分离可用于控制纳米管的直径。

    Method of coating a substrate with a calcium phosphate compound
    7.
    发明授权
    Method of coating a substrate with a calcium phosphate compound 有权
    用磷酸钙化合物涂覆底物的方法

    公开(公告)号：US6113993A

    公开(公告)日：2000-09-05

    申请号：US182741

    申请日：1998-10-28

    申请人： Yufei Gao ,  Allison A. Campbell

    发明人： Yufei Gao ,  Allison A. Campbell

    IPC分类号： C23C14/06 ,  H05H1/24 ,  B05D3/00

    CPC分类号： C23C14/06 ,  A61F2/30767 ,  A61F2002/30981 ,  A61F2310/00017 ,  A61F2310/00023 ,  A61F2310/00029 ,  A61F2310/00179 ,  A61F2310/00329 ,  A61F2310/00796

    摘要： The present invention is a method of coating a substrate with a calcium phosphate compound using plasma enhanced MOCVD. The substrate is a solid material that may be porous or non-porous, including but not limited to metal, ceramic, glass and combinations thereof. The coated substrate is preferably used as an implant, including but not limited to orthopaedic, dental and combinations thereof. Calcium phosphate compound includes but is not limited to tricalcium phosphate (TCP), hydroxyapatite (HA) and combinations thereof. TCP is preferred on a titanium implant when implant resorbability is desired. HA is preferred when the bone bonding of new bone tissue into the structure of the implant is desired. Either or both of TCP and/or HA coated implants may be placed into a solution with an agent selected from the group of protein, antibiotic, antimicrobial, growth factor and combinations thereof that can be adsorbed into the coating before implantation. Once implanted, the release of TCP will also release the agent to improve growth of new bone tissues and/or to prevent infection.

    摘要翻译： 本发明是使用等离子体增强的MOCVD，用磷酸钙化合物涂覆底物的方法。 基材是可以是多孔或无孔的固体材料，包括但不限于金属，陶瓷，玻璃及其组合。 涂覆的基底优选用作植入物，包括但不限于矫形，牙科及其组合。 磷酸钙化合物包括但不限于磷酸三钙（TCP），羟基磷灰石（HA）及其组合。 当需要植入物再吸收时，在钛植入物上优选TCP。 当需要新骨组织的骨结合到植入物的结构中时，HA是优选的。 可以将TCP和/或HA涂覆的植入物中的任一种或两者置于具有选自蛋白质，抗生素，抗微生物，生长因子及其组合的药剂的溶液中，所述药剂可以在植入前被吸附到涂层中。 一旦植入，TCP的释放也将释放药剂以改善新骨组织的生长和/或预防感染。