Shrinkable silver diffraction grating fabricated inside a hydrogel using 522-nm femtosecond laser.
Shrinkable silver diffraction grating fabricated inside a hydrogel using 522-nm femtosecond laser.
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DOI：
10.1038/s41598-017-17636-z
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发表时间：
2018-01-09
影响因子：
4.6
通讯作者：
Terakawa M
中科院分区：
文献类型：
--
作者：
Machida M;Nakajima Y;Torres-Mapa ML;Heinemann D;Heisterkamp A;Terakawa M
金属微结构与软材料的结合具有良好的柔性和生物相容性，是实现新型光学和生物医学器件的重要途径。然而，在软材料内制造三维金属结构仍然具有挑战性。在这项研究中，我们证明了一个银衍射光栅内的生物相容性聚（乙二醇）二丙烯酸酯（PEGDA）水凝胶制造通过使用522 nm的飞秒激光通过多光子光还原银离子。用该光栅获得的光学衍射图案显示出等间距的衍射斑点，这表明形成了规则的周期性银光栅。值得注意的是，当水凝胶中的水含量降低时，衍射斑点之间的距离发生变化。当水凝胶由于失水而收缩时，光栅周期减小，但保留了线结构的直线形状，这证明了所制造的结构的光学可调谐性。我们的研究结果表明，飞秒激光为基础的光还原技术的新型可调谐光学器件的制造以及高精度的结构的潜力。
The integration of metal microstructures and soft materials is promising for the realization of novel optical and biomedical devices owing to the flexibility and biocompatibility of the latter. Nevertheless, the fabrication of three-dimensional metal structures within a soft material is still challenging. In this study, we demonstrate the fabrication of a silver diffraction grating inside a biocompatible poly(ethylene glycol) diacrylate (PEGDA) hydrogel by using a 522-nm femtosecond laser via multi-photon photoreduction of silver ions. The optical diffraction pattern obtained with the grating showed equally spaced diffraction spots, which indicated that a regular, periodic silver grating was formed. Notably, the distance between the diffraction spots changed when the water content in the hydrogel was reduced. The grating period decreased when the hydrogel shrank owing to the loss of water, but the straight shapes of the line structures were preserved, which demonstrated the optical tunability of the fabricated structure. Our results demonstrate the potential of the femtosecond laser-based photoreduction technique for the fabrication of novel tunable optical devices as well as highly precise structures.
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影响因子：
8.4
作者：
Kishore, P. V. N.;Shankar, M. Sai;Satyanarayana, M.
通讯作者：
Satyanarayana, M.
影响因子：
35
作者：
通讯作者：
--
影响因子：
6.6
作者：
Cha C;Soman P;Zhu W;Nikkhah M;Camci-Unal G;Chen S;Khademhosseini A
通讯作者：
Khademhosseini A
影响因子：
7.4
作者：
Russell, RJ;Pishko, MV;Coté, GL
通讯作者：
Coté, GL
影响因子：
2.8
作者：
Nakamura, Ryotaro;Hitomi, Masato;Tsutsumi, Naoto
通讯作者：
Tsutsumi, Naoto