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首页> 外文期刊>Advanced Functional Materials >Nanoconfined Atomic Layer Deposition of TiO2/Pt Nanotubes: Toward Ultrasmall Highly Efficient Catalytic Nanorockets
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Nanoconfined Atomic Layer Deposition of TiO2/Pt Nanotubes: Toward Ultrasmall Highly Efficient Catalytic Nanorockets

机译：TiO2 / Pt纳米管的纳米限制原子层沉积：向超小型高效催化纳米火箭的方向发展。

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摘要

Small machines are highly promising for future medicine and new materials. Recent advances in functional nanomaterials have driven the development of synthetic inorganic micromachines that are capable of efficient propulsion and complex operation. Miniaturization and large-scale manufacturing of these tiny machines with true nanometer dimension are crucial for compatibility with subcellular components and molecular machines in operation. Here, block copolymer lithography is combined with atomic layer deposition for wafer-scale fabrication of ultrasmall coaxial TiO2/Pt nanotubes as catalytic rocket engines with length below 150 nm and a tubular reactor size of only 20 nm, leading to the smallest man-made rocket engine reported to date. The movement of the nanorockets is examined using dark-field microscopy particle tracking and dynamic light scattering. The high catalytic activity of the Pt inner layer and the reaction confined within the extremely small nanoreactor enable highly efficient propulsion, achieving speeds over 35 mu m s(-1) at a low Reynolds number of <10(-5). The collective movements of these nanorockets are able to efficiently power the directional transport of significantly larger passive cargo.
机译：小型机器在未来的医学和新材料方面具有很大的前景。功能纳米材料的最新进展推动了能够有效推进和复杂运行的合成无机微机械的发展。这些具有真正纳米尺寸的微型机器的小型化和大规模制造对于与运行中的亚细胞组件和分子机器的兼容性至关重要。在这里，嵌段共聚物光刻技术与原子层沉积技术相结合，可用于晶圆级制造超小型同轴TiO2 / Pt纳米管，作为长度小于150 nm，管状反应堆尺寸仅为20 nm的催化火箭发动机，从而生产出最小的人造火箭迄今报告的引擎。使用暗视野显微镜粒子跟踪和动态光散射检查了纳米火箭的运动。 Pt内层的高催化活性和限制在极小的纳米反应器中的反应可实现高效推进，在低于10（-5）的雷诺数下可实现超过35μms（-1）的速度。这些纳米火箭的集体运动能够有效地驱动明显更大的被动货物的定向运输。

著录项

  • 来源
    《Advanced Functional Materials》 |2017年第24期|1700598.1-1700598.8|共8页
  • 作者

    Li Jinxing; Liu Wenjuan; Wang Jiyuan; Rozen Isaac; He Sha; Chen Chuanrui; Kim Hyun Gu; Lee Ha-Jin; Lee Han-Bo-Ram; Kwon Se-Hun; Li Tianlong; Li Longqiu; Wang Joseph; Mei Yongfeng;

  • 作者单位

    Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA;

    Harbin Inst Technol, State Key Lab Robot & Syst, Harbin 150001, Heilongjiang, Peoples R China;

    Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA;

    Incheon Natl Univ, Dept Mat Sci & Engn, Incheon 22012, South Korea;

    Pusan Natl Univ, Sch Mat Sci & Engn, Busan 46241, South Korea;

    Incheon Natl Univ, Dept Mat Sci & Engn, Incheon 22012, South Korea;

    Pusan Natl Univ, Sch Mat Sci & Engn, Busan 46241, South Korea;

    Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA|Harbin Inst Technol, State Key Lab Robot & Syst, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, State Key Lab Robot & Syst, Harbin 150001, Heilongjiang, Peoples R China;

    Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA;

    Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    atomic layer deposition; block polymer nanolithography; catalytic propulsion; collective behavior; nanorockets;

    机译：原子层沉积;嵌段聚合物纳米光刻;催化推进;集体行为;纳米核;

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