Laser Stimulated Shape Memory Polymer with Inclusion of Gold Nanorod—Effect of Aspect Ratio and Critical Role of On-resonance Irradiation
Laser Stimulated Shape Memory Polymer with Inclusion of Gold Nanorod—Effect of Aspect Ratio and Critical Role of On-resonance Irradiation
复制标题
DOI：
10.1016/j.jmst.2016.05.017
复制
发表时间：
2017-08
影响因子：
10.9
通讯作者：
Yanbo Yao;Phong Tran Hoang;Tao Liu
中科院分区：
文献类型：
--
作者：
Yanbo Yao;Phong Tran Hoang;Tao Liu
金纳米棒 (AuNR) 是优异的光热剂，可实现多种激光刺激功能聚合物。一个关键问题是最大化 AuNR 的光热转换效率。在本研究中，制备了包含不同长径比的 AuNR 的光响应 AuNR/形状记忆聚合物（SMP）纳米复合材料，对其进行了表征，并研究了它们的激光照射诱导弯曲行为。共振辐照条件的关键作用——AuNR 的纵向等离激元共振与入射激光的波长的紧密匹配——已经确定。它可以最大限度地提高 AuNR 的光热转换效率，从而导致 AuNR/SMP 纳米复合材料快速大变形。对于在相似加工条件下制备的AuNR/SMP纳米复合薄膜，1.27W/cm2的近共振辐照能够诱导27°/s的弯曲速率和90.4°的最大弯曲角度。相比之下，1.89 W/cm2 的非共振辐射导致的响应可以忽略不计。
Gold nanorods (AuNRs) are excellent photothermal agents to enable a variety of laser stimulated functional polymers. One key issue is to maximize the photothermal conversion efficiency of AuNRs. In this study, the light responsive AuNR/shape memory polymer (SMP) nanocomposites with inclusion of AuNRs of varied aspect ratios were prepared, characterized, and their laser irradiation induced bending behavior was investigated. The critical role of the on-resonance irradiation condition—a close match of the longitudinal plasmon resonance of the AuNR with the wavelength of the incident laser—has been established. It allows for maximizing the photothermal conversion efficiency of AuNRs to result in the rapid and large deformation of the AuNR/SMP nanocomposites. For the AuNR/SMP nanocomposite films prepared under similar processing conditions, the close-to-resonance irradiation at a 1.27 W/cm2was able to induce a bending rate of 27°/s and maximum bending angle of 90.4°. In contrast, the off-resonance irradiation at a 1.89 W/cm2resulted in negligible response.