Rapid photothermal actuation of light-addressable, arrayed hydrogel columns in a macroporous silicon membrane
Rapid photothermal actuation of light-addressable, arrayed hydrogel columns in a macroporous silicon membrane
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DOI：
10.1016/j.sna.2019.111729
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发表时间：
2020-01-01
影响因子：
4.6
通讯作者：
Seo, Sang-Woo
中科院分区：
文献类型：
--
作者：
Song, Youngsik;Azmand, Hojjat Rostami;Seo, Sang-Woo
本文介绍了大孔硅膜中可光寻址的阵列水凝胶柱的快速光热驱动。将金纳米棒纳入热响应 p-NIPAAm 水凝胶中，利用近红外光引起的表面等离激元局部加热。通过测量嵌入金纳米棒的水凝胶制造的膜结构的光透射率，我们证明了水凝胶的光热驱动可以以二维、像素状的配置进行，具有高空间和时间分辨率。得益于微米级孔隙内的水凝胶体积限制，我们实现了水凝胶光热驱动的亚秒响应时间及其在高度局部照明区域的可重复光热驱动。考虑到每个水凝胶柱都被限制在每个孔内，并且可以使用不同波长的光通过改变金纳米棒的物理尺寸来诱导水凝胶消溶胀特性的光热驱动，因此它具有用于具有快速响应时间的光学可寻址、多重药物释放系统的潜力。 (C) 2019 Elsevier B.V. 保留所有权利。
This paper presents rapid photothermal actuation of light-addressable, arrayed hydrogel columns in a macroporous silicon membrane. Au nanorods are incorporated into thermo-responsive p-NIPAAm hydrogel to utilize surface plasmon-induced local heating by near-infrared light. By measuring optical transmission through the fabricated membrane structure with Au nanorod embedded hydrogel, we have demonstrated that photothermal actuation of the hydrogel can be done in two-dimensional, pixel-like configuration with high spatial and temporal resolutions. Benefiting from the hydrogel volume confinement within micron-sized pores, we have achieved sub-second response time of hydrogel photothermal actuation and its repeatable photothermal actuation on highly localized illuminated area. Considering that each hydrogel column is confined within each pore and different wavelengths of light can be used to induce photothermal actuation of hydrogel's deswelling characteristics by modifying the physical dimensions of Au nanorods, it has a potential for optically-addressable, multiplexed drug release systems with the rapid response time. (C) 2019 Elsevier B.V. All rights reserved.