A bioinspired hydrogen bond-triggered ultrasensitive ionic mechanoreceptor skin
A bioinspired hydrogen bond-triggered ultrasensitive ionic mechanoreceptor skin
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DOI：
10.1038/s41467-019-11973-5
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发表时间：
2019-09-05
影响因子：
16.6
通讯作者：
Kim, Do Hwan
中科院分区：
文献类型：
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作者：
Amoli, Vipin;Kim, Joo Sung;Kim, Do Hwan
生物细胞结构激发了许多科学学科设计可以模拟其功能的合成结构。在这里，我们在合理设计的合成多细胞混合离子泵中密切模拟生物细胞结构，该离子泵由嵌入热塑性聚氨酯弹性体基质（人工机械感受器细胞）的二氧化硅微结构（人工机械感受器细胞）表面上的氢键[EMIM+][TFSI-]离子对组成（人工细胞外基质），以制造离子机械感受器皮肤。离子机械感受器在外部刺激下参与氢键触发的离子可逆泵送。我们的离子型机械感受器皮肤在超低电压（ImV）下在宽范围的压力（0-135 kPa）上是超敏感的（48.1-5.77 kPa（-1）），并且证明了超过各种天然皮肤机械感受器的压力感测能力的能力（即，默克尔细胞、迈斯纳小体、帕西尼小体）。我们展示了一种可穿戴无人机微控制器，它集成了我们的离子皮肤传感器阵列和柔性印刷电路板，可以在无人机飞行中同时选择性地控制方向和速度。
Biological cellular structures have inspired many scientific disciplines to design synthetic structures that can mimic their functions. Here, we closely emulate biological cellular structures in a rationally designed synthetic multicellular hybrid ion pump, composed of hydrogen-bonded [EMIM+][TFSI-] ion pairs on the surface of silica microstructures (artificial mechanoreceptor cells) embedded into thermoplastic polyurethane elastomeric matrix (artificial extracellular matrix), to fabricate ionic mechanoreceptor skins. Ionic mechanoreceptors engage in hydrogen bond-triggered reversible pumping of ions under external stimulus. Our ionic mechanoreceptor skin is ultrasensitive (48.1-5.77 kPa(-1)) over a wide spectrum of pressures (0-135 kPa) at an ultra-low voltage (1 mV) and demonstrates the ability to surpass pressure-sensing capabilities of various natural skin mechanoreceptors (i.e., Merkel cells, Meissner's corpuscles, Pacinian corpuscles). We demonstrate a wearable drone microcontroller by integrating our ionic skin sensor array and flexible printed circuit board, which can control directions and speed simultaneously and selectively in aerial drone flight.