Shin Wooseop, Lim Jaemook, Lee Younggeun, Park Sewoong, Kim Hyeonseok, Cho Hyunmin, Shin Jaeho, Yoon Yeosang, Lee Habeom, Kim Hyun-Jong, Han Seungyong, Ko Seung Hwan, Hong Sukjoon
Optical Nanoprocessing Lab, Department of Mechanical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Korea.
Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
Materials (Basel). 2018 Dec 11;11(12):2511. doi: 10.3390/ma11122511.
Selective laser sintering of metal nanoparticle ink is an attractive technology for the creation of metal layers at the microscale without any vacuum deposition process, yet its application to elastomer substrates has remained a highly challenging task. To address this issue, we introduced the shear-assisted laser transfer of metal nanoparticle ink by utilizing the difference in thermal expansion coefficients between the elastomer and the target metal electrode. The laser was focused and scanned across the absorbing metal nanoparticle ink layer that was in conformal contact with the elastomer with a high thermal expansion coefficient. The resultant shear stress at the interface assists the selective transfer of the sintered metal nanoparticle layer. We expect that the proposed method can be a competent fabrication route for a transparent conductor on elastomer substrates.
金属纳米颗粒油墨的选择性激光烧结是一种极具吸引力的技术，可在无需任何真空沉积工艺的情况下在微观尺度上创建金属层，但其在弹性体基材上的应用仍然是一项极具挑战性的任务。为了解决这个问题，我们利用弹性体与目标金属电极之间热膨胀系数的差异，引入了金属纳米颗粒油墨的剪切辅助激光转移。激光聚焦并扫描与具有高热膨胀系数的弹性体共形接触的吸收性金属纳米颗粒油墨层。界面处产生的剪切应力有助于烧结金属纳米颗粒层的选择性转移。我们期望所提出的方法能够成为在弹性体基材上制备透明导体的有效制造途径。
