Laser Stimulated Shape Memory Polymer with Inclusion of Gold Nanorod-Effect of Aspect Ratio and Critical Role of On-resonance Irradiation

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 869-873
• 页数: 5页
• 语种: 英文

摘要

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/cm2 was 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/cm2 resulted in negligible response.