Yoon Sun Geun, Koo Hyung-Jun, Chang Suk Tai
School of Chemical Engineering and Materials Science, Chung-Ang University , Seoul 156-756, Republic of Korea.
Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology , Seoul 139-743, Republic of Korea.
ACS Appl Mater Interfaces. 2015 Dec 16;7(49):27562-70. doi: 10.1021/acsami.5b08404. Epub 2015 Dec 1.
We report a new class of simple microfluidic strain sensors with high stretchability, transparency, sensitivity, and long-term stability with no considerable hysteresis and a fast response to various deformations by combining the merits of microfluidic techniques and ionic liquids. The high optical transparency of the strain sensors was achieved by introducing refractive-index matched ionic liquids into microfluidic networks or channels embedded in an elastomeric matrix. The microfluidic strain sensors offer the outstanding sensor performance under a variety of deformations induced by stretching, bending, pressing, and twisting of the microfluidic strain sensors. The principle of our microfluidic strain sensor is explained by a theoretical model based on the elastic channel deformation. In order to demonstrate its capability of practical usage, the simple-structured microfluidic strain sensors were performed onto a finger, wrist, and arm. The highly stretchable and transparent microfluidic strain sensors were successfully applied as potential platforms for distinctively monitoring a wide range of human body motions in real time. Our novel microfluidic strain sensors show great promise for making future stretchable electronic devices.
我们报道了一类新型的简单微流控应变传感器，它结合了微流控技术和离子液体的优点，具有高拉伸性、透明度、灵敏度和长期稳定性，没有明显的滞后现象，并且对各种变形具有快速响应。通过将折射率匹配的离子液体引入嵌入弹性体基质中的微流控网络或通道，实现了应变传感器的高光学透明度。微流控应变传感器在微流控应变传感器的拉伸、弯曲、挤压和扭转等各种变形下表现出出色的传感器性能。我们的微流控应变传感器的原理由基于弹性通道变形的理论模型解释。为了证明其实际应用能力，将结构简单的微流控应变传感器应用于手指、手腕和手臂上。高度可拉伸且透明的微流控应变传感器成功地作为潜在平台，用于实时独特地监测广泛的人体运动。我们新颖的微流控应变传感器在制造未来可拉伸电子设备方面显示出巨大的潜力。
