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Structured spheres generated by an in-fibre fluid instability

机译：纤维内流体不稳定性产生的结构化球

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摘要

From drug delivery~(1,2) to chemical and biological catalysis~3 and cosmetics~4, the need for efficient fabrication pathways for particles over a wide range of sizes, from a variety of materials, and in many different structures has been well established~5. Here we harness the inherent scalability of fibre production~6 and an in-fibre Plateau-Rayleigh capillary instability~7 for the fabrication of uniformly sized, structured spherical particles spanning an exceptionally wide range of sizes: from 2 mm down to 20 nm. Thermal processing of a multimaterial fibre~8 controllably induces the instability~9, resulting in a well-ordered, oriented emulsion~(10) in three dimensions. The fibre core and cladding correspond to the dispersed and continuous phases, respectively, and are both frozen in situ on cooling, after which the particles are released when needed. By arranging a variety of structures and materials in a macroscopic scaled-up model of the fibre, we produce composite, structured, spherical particles, such as core-shell particles, two-compartment 'Janus' particles~(11), and multi-sectioned 'beach ball' particles. Moreover, producing fibres with a high density of cores allows for an unprecedented level of parallelization. In principle, 10~8 50-nm cores may be embedded in metres-long, 1-mm-diameter fibre, which can be induced to break up simultaneously throughout its length, into uniformly sized, structured spheres.
机译：从药物递送（1,2）到化学和生物催化〜3和化妆品〜4，对于有效地制造各种尺寸，多种材料，多种结构的颗粒的途径的需求已经非常普遍成立〜5。在这里，我们利用纤维生产的固有可扩展性〜6和纤维中的高原-瑞利毛细管不稳定性〜7，来制造尺寸范围广泛的均匀大小，结构化的球形颗粒：从2 mm到20 nm。多材料纤维〜8的热处理可控地引起不稳定性〜9，从而在三个维度上产生了排列整齐的定向乳液〜（10）。纤维芯和包层分别对应于分散相和连续相，并且在冷却时均被原位冷冻，然后在需要时释放颗粒。通过在纤维的宏观放大模型中排列各种结构和材料，我们生产出复合，结构化的球形颗粒，例如核-壳颗粒，两室“ Janus”颗粒〜（11）和多分段的“沙滩球”颗粒。此外，生产具有高纤芯密度的光纤可实现前所未有的并行化水平。原则上，可以将10〜8个50-nm的核嵌入到1米长的直径为1毫米的光纤中，然后可以诱导其在其整个长度上同时分解为大小均一的结构化球体。

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  • 来源
    《Nature》 |2012年第7408期|p.463-467|共5页
  • 作者

    Joshua J. Kaufman; Guangming Tao; Soroush Shabahang; Esmaeil-Hooman Banaei; Daosheng S. Deng; Xiangdong Liang; Steven G. Johnson; Yoel Fink; Ayman F. Abouraddy;

  • 作者单位

    CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA;

    CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA;

    CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA;

    CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA,Department of Electrical Engineering & Computer Science, University of Central Florida, Orlando,Florida 32816, USA;

    Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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