DESIGN AND SYNTHESIS OF METAL OXIDE SURFACES AND INTERFACES WITH CRYSTALLOGRAPHIC CONTROL USING SOLID-LIQUID-VAPOR ETCHING AND VAPOR-LIQUID-SOLID GROWTH

    公开(公告)号:US20180019122A1

    公开(公告)日:2018-01-18

    申请号:US15370041

    申请日:2016-12-06

    发明人: Beth S. Guiton Lei Yu

    IPC分类号: H01L21/02 C23F1/00 H01L21/465

    摘要: The present invention provides integrated nanostructures comprising a single-crystalline matrix of a material A containing aligned, single-crystalline nanowires of a material B, with well-defined crystallographic interfaces are disclosed. The nanocomposite is fabricated by utilizing metal nanodroplets in two subsequent catalytic steps: solid-liquid-vapor etching, followed by vapor-liquid-solid growth. The first etching step produces pores, or “negative nanowires” within a single-crystalline matrix, which share a unique crystallographic direction, and are therefore aligned with respect to one another. Further, since they are contained within a single, crystalline, matrix, their size and spacing can be controlled by their interacting strain fields, and the array is easily manipulated as a single entity—addressing a great challenge to the integration of freestanding nanowires into functional materials. In the second, growth, step, the same metal nanoparticles are used to fill the pores with single-crystalline nanowires, which similarly to the negative nanowires have unique growth directions, and well-defined sizes and spacings. The two parts of this composite behave synergistically, since this nanowire-filled matrix contains a dense array of well-defined crystallographic interfaces, in which both the matrix and nanowire materials convey functionality to the material. The material of either one of these components may be chosen from a vast library of any material able to form a eutectic alloy with the metal in question, including but not limited to every material thus far grown in nanowire form using the ubiquitous vapor-liquid-solid approach. This has profound implications for the fabrication of any material intended to contain a functional interface, since high interfacial areas and high quality interfacial structure should be expected. Technologies to which this simple approach could be applied include but are not limited to p-n junctions of solar cells, battery electrode arrays, multiferroic materials, and plasmonic materials.

    Lateral growth semiconductor method and devices
    7.
    发明授权
    Lateral growth semiconductor method and devices 有权
    横向生长半导体方法和器件

    公开(公告)号:US09484197B2

    公开(公告)日:2016-11-01

    申请号:US12910055

    申请日:2010-10-22

    摘要: A method of growing high quality crystalline films on lattice-mismatched or amorphous layers is presented allowing semiconductor materials that would normally be subject to high stress and cracking to be employed allowing cost reductions and/or performance improvements in devices to be obtained. Catalysis of the growth of these films is based upon utilizing particular combinations of metals, materials, and structures to establish growth of the crystalline film from a predetermined location. The subsequent film growth occurring in one or two dimensions to cover a predetermined area of the amorphous or lattice-mismatched substrate. Accordingly the technique can be used to either cover a large area or provide tiles of crystalline material with or without crystalline film interconnections.

    摘要翻译: 提出了在晶格失配或非晶层上生长高质量结晶膜的方法,允许通常采用高应力和开裂的半导体材料,从而可以获得要获得的器件的成本降低和/或性能改进。 这些膜的生长的催化基于利用金属,材料和结构的特定组合来建立晶体膜从预定位置的生长。 随后的膜生长以一维或二维发生,以覆盖非晶形或晶格失配衬底的预定区域。 因此,该技术可以用于覆盖大面积或提供具有或不具有结晶膜互连的结晶材料的瓦片。

    SYSTEMS AND METHODS FOR AUTOMATED PRODUCTION OF MULTI-COMPOSITION NANOMATERIAL
    10.
    发明申请
    SYSTEMS AND METHODS FOR AUTOMATED PRODUCTION OF MULTI-COMPOSITION NANOMATERIAL 审中-公开
    用于自动生产多组分纳米材料的系统和方法

    公开(公告)号:US20150368831A1

    公开(公告)日:2015-12-24

    申请号:US14742932

    申请日:2015-06-18

    发明人: Tao Wu Guodong Li

    摘要: Various methods and systems are provided for production of nanowires or other nanomaterials. In one example, among others, a system includes a furnace configured to heat at least a portion of a tube, a material feeder coupled to a first end of the tube, and a vacuum pumping system coupled to a second end of the tube. The material feeder can include a source material manipulator that can position a source material in a fixture of a feeder arm and a linear manipulator that can extend the fixture into the tube, where it can be heated to produce a precursor vapor that can be used to form a nanomaterial on a substrate. In another example, a method includes extending a fixture holding source material into a furnace tube, drawing a precursor vapor produced from the source material across a substrate in the furnace tube, and forming nanomaterial on the substrate.

    摘要翻译: 为纳米线或其他纳米材料的生产提供了各种方法和系统。 在一个示例中,系统包括构造成加热管的至少一部分的炉,连接到管的第一端的材料供给器和耦合到管的第二端的真空泵送系统。 材料馈送器可以包括源材料操纵器,其可以将源材料定位在馈送臂的固定装置中,以及线性操纵器,其可以将固定装置延伸到管中,在那里可以将其加热以产生可用于 在衬底上形成纳米材料。 在另一个实例中,一种方法包括将夹持源材料延伸到炉管中,从源材料产生的前体蒸汽穿过炉管中的衬底,并在衬底上形成纳米材料。