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    • 3. 发明申请
    • Tubular carbon nano/micro structures and method of making same
    • 管状碳纳米/微结构及其制作方法
    • US20050238567A1
    • 2005-10-27
    • US10937738
    • 2004-09-09
    • Mahendra SunkaraGopinath Bhimarasetti
    • Mahendra SunkaraGopinath Bhimarasetti
    • D01F9/12D01F9/127
    • B82Y30/00D01F9/127Y10T428/2918
    • A method of synthesizing and controlling the internal diameters, conical angles, and morphology of tubular carbon nano/micro structures. Different morphologies can be synthesized included but not limited to cones, straight tubes, nozzles, cone-on-tube (funnels), tube-on-cone, cone-tube-cone, n-staged structures, multijunctioned tubes, Y-junctions, dumbbell (pinched morphology) and capsules. The process is based on changing the wetting behavior of a low melting metals such as gallium, indium, and aluminum with carbon using a growth environment of different gas phase chemistries. The described carbon tubular morphologies can be synthesized using any kind of gas phase excitation such as, but not limited to, microwave excitation, hot filament excitation, thermal excitation and Radio Frequency (RF) excitations. The depositions area is only limited by the substrate area in the equipment used and not limited by the process. The internal diameters of the carbon tubular structures can be varied from a few nm to as high as about 20 microns. The wall thickness is about 10-20 nm. The carbon tubular structures can be formed open on both ends are directly applicable to micro-fluidics. Gallium required for the growth of the carbon tubes can be supplied either as a thin film on the substrate or could be supplied through the gas phase with different precursors such as Tri-methyl gallium. Seamless Y-junctions with no internal obstructions can be synthesized without the need of templates. Multi-channeled junctions can also be synthesized without any internal obstructions. Gallium that partially fills the carbon structures can be removed from the tubes by simple heating in vacuum at temperature above 600°.
    • 一种合成和控制管状碳纳米/微结构的内径,锥角和形态的方法。 可以合成不同的形态,但不限于锥体,直管,喷嘴,管中管(漏斗),锥管,锥管锥,n阶段结构,多功能管,Y形结, 哑铃(捏形态)和胶囊。 该方法基于使用不同气相化学的生长环境来改变低熔点金属如镓,铟和铝与碳的润湿行为。 所描述的碳管形态可以使用任何种类的气相激发合成,例如但不限于微波激发,热丝激发,热激发和射频(RF)激发。 沉积区仅受所用设备中的基材面积的限制,不受该方法的限制。 碳管状结构的内径可以从几nm变化到高达约20微米。 壁厚约为10-20nm。 碳管结构可以在两端形成开放直接适用于微流体。 碳管生长所需的镓可以作为薄膜提供在基底上,或者可以通过气相与诸如三甲基镓的不同前体一起提供。 无需模板即可合成无内部障碍物的无缝Y接头。 多通道结也可以合成而没有任何内部障碍物。 部分填充碳结构的镓可以通过在高于600℃的温度下在真空中简单加热而从管中除去。
    • 10. 发明授权
    • Tubular carbon nano/micro structures and method of making same
    • 管状碳纳米/微结构及其制作方法
    • US07597941B2
    • 2009-10-06
    • US10937738
    • 2004-09-09
    • Mahendra Kumar SunkaraGopinath Bhimarasetti
    • Mahendra Kumar SunkaraGopinath Bhimarasetti
    • H05H1/24D01F9/12B32B9/00
    • B82Y30/00D01F9/127Y10T428/2918
    • A method of synthesizing and controlling the internal diameters, conical angles, and morphology of tubular carbon nano/micro structures. Different morphologies can be synthesized included but not limited to cones, straight tubes, nozzles, cone-on-tube (funnels), tube-on-cone, cone-tube-cone, n-staged structures, multijunctioned tubes, Y-junctions, dumbbell (pinched morphology) and capsules. The process is based on changing the wetting behavior of a low melting metals such as gallium, indium, and aluminum with carbon using a growth environment of different gas phase chemistries. The described carbon tubular morphologies can be synthesized using any kind of gas phase excitation such as, but not limited to, microwave excitation, hot filament excitation, thermal excitation and Radio Frequency (RF) excitations. The depositions area is only limited by the substrate area in the equipment used and not limited by the process. The internal diameters of the carbon tubular structures can be varied from a few nm to as high as about 20 microns. The wall thickness is about 10-20 nm. The carbon tubular structures can be formed open on both ends are directly applicable to micro-fluidics. Gallium required for the growth of the carbon tubes can be supplied either as a thin film on the substrate or could be supplied through the gas phase with different precursors such as Tri-methyl gallium. Seamless Y-junctions with no internal obstructions can be synthesized without the need of templates. Multi-channeled junctions can also be synthesized without any internal obstructions. Gallium that partially fills the carbon structures can be removed from the tubes by simple heating in vacuum at temperature above 600°.
    • 一种合成和控制管状碳纳米/微结构的内径,锥角和形态的方法。 可以合成不同的形态,但不限于锥体,直管,喷嘴,管中管(漏斗),锥管,锥管锥,n阶段结构,多功能管,Y形结, 哑铃(捏形态)和胶囊。 该方法基于使用不同气相化学的生长环境来改变低熔点金属如镓,铟和铝与碳的润湿行为。 所描述的碳管形态可以使用任何种类的气相激发合成,例如但不限于微波激发,热丝激发,热激发和射频(RF)激发。 沉积区仅受所用设备中的基材面积的限制,不受该方法的限制。 碳管状结构的内径可以从几nm变化到高达约20微米。 壁厚约为10-20nm。 碳管结构可以在两端形成开放直接适用于微流体。 碳管生长所需的镓可以作为薄膜提供在基底上,或者可以通过气相与诸如三甲基镓的不同前体一起提供。 无需模板即可合成无内部障碍物的无缝Y接头。 多通道结也可以合成而没有任何内部障碍物。 部分填充碳结构的镓可以通过在高于600℃的温度下在真空中简单加热而从管中除去。