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首页> 外文期刊>Microelectronic Engineering >Bionic soft crystalline lens materials for MEMs applications based on self-assembling amphiphilic block copolymer/nanoparticle hybrids
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Bionic soft crystalline lens materials for MEMs applications based on self-assembling amphiphilic block copolymer/nanoparticle hybrids

机译:基于自组装两亲嵌段共聚物/纳米粒子杂化物的用于MEMs的仿生软晶透镜材料

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摘要

In this study, a biomimetic crystalline lens with properties that combine the softness of a hydrogel comparable to that of a human lens for adjustable focus and the property for image aberration correction with gradient refractive index (GRIN) was developed by the self-organization of an amphiphilic block copoly-mer blended with high refractive index titanium nanoparticles (TiO_2). The hydrogel lens was prepared by using a thermally responsive poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PPO-PEO-PPO) triblock copolymer (Poloxamer 407) with the lower-critical solution temperature (LCST) property that can be injectable into the eye capsule as a liquid below its LCST and solidifies as a soft gel above the LCST at the human body temperature. By chemical modification of the triblock copolymer with double bonds on its chain-ends (Poloxamer 407A), the soft lens network can be made by using UV crosslinking of the hydrogel. To further increase the refractive index (RI) of the hydrogel lens network and to match its RI to that of the human lens (-1.41), highly visible-light transparent titanium dioxide (TiO_2) nanoparticles were introduced into the hydrogel lens network. To create a biomimetic GRIN lens as in the human's eyes, an electric field method was also used to induce an axial diffusion of TiO_2 nanoparticles from the center of the lens where TiO_2 nanoparticles were first injected to the edge. The above method demonstrates the potential to use the hydrogel/nanoparticle hybrid as an injectable replacement for a soft optical lens system with an adjustable focus for future MEMs application.
机译:在这项研究中,仿生晶体镜片的性能结合了水凝胶的柔软性与可调节焦点的人类镜片相当,并且具有通过梯度折射率(GRIN)进行像差校正的性质。两亲性嵌段共聚物与高折射率钛纳米粒子(TiO_2)混合。水凝胶镜片是通过使用具有较低临界溶液温度(LCST)的热响应性聚环氧乙烷-聚环氧丙烷-聚环氧乙烷(PPO-PEO-PPO)三嵌段共聚物(Poloxamer 407)制备的该特性可在人的体温下以低于LCST的液体形式注入眼囊,并以高于LCST的软凝胶形式固化。通过对三嵌段共聚物在其链端具有双键的化学修饰(Poloxamer 407A),可以通过使用水凝胶的UV交联来制造软透镜网络。为了进一步提高水凝胶透镜网络的折射率(RI)并使它的RI与人类透镜的折射率(-1.41)相匹配,将高可见光透明的二氧化钛(TiO_2)纳米粒子引入到水凝胶透镜网络中。为了制造像人眼一样的仿生GRIN镜片,还使用电场方法诱导TiO_2纳米粒子从镜片中心轴向扩散,该中心首先将TiO_2纳米粒子注入到边缘。上述方法证明了使用水凝胶/纳米颗粒杂化物作为可调节焦点的软光学透镜系统的可注射替代物的潜力,以用于将来的MEMs应用。

著录项

  • 来源
    《Microelectronic Engineering》 |2011年第8期|p.1737-1741|共5页
  • 作者单位

    Institute of Polymer Science and Engineering. National Taiwan University, Taipei 106, Taiwan;

    Institute of Polymer Science and Engineering. National Taiwan University, Taipei 106, Taiwan;

    Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan;

    Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan;

    Institute of Polymer Science and Engineering. National Taiwan University, Taipei 106, Taiwan Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan;

    Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan;

    Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan;

    Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan;

    Taiwan Adventist Hospital, Taipei 106, Taiwan;

    Department of Mechanical Engineering. National Taiwan University, Taipei 106, Taiwan;

    Department of Mechanical Engineering. National Taiwan University, Taipei 106, Taiwan;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    artificial lens; nanoparticles; soft materials; uv crosslinking;

    机译:人造晶状体;纳米粒子;软质材料;紫外光交联;

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