Wang Ming, Wang Wei, Leow Wan Ru, Wan Changjin, Chen Geng, Zeng Yi, Yu Jiancan, Liu Yaqing, Cai Pingqiang, Wang Hong, Ielmini Daniele, Chen Xiaodong
Innovative Center for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza L. da Vinci 32, 20133, Milano, Italy.
Adv Mater. 2018 Jul 3:e1802516. doi: 10.1002/adma.201802516.
The increasing need for smart systems in healthcare, wearable, and soft robotics is creating demand for low-power sensory circuits that can detect pressure, temperature, strain, and other local variables. Among the most critical requirements, the matrix circuitry to address the individual sensor device must be sensitive, immune to disturbances, and flexible within a high-density sensory array. Here, a strategy is reported to enhance the matrix addressing of a fully integrated flexible sensory array with an improvement of 10 fold in the maximum readout value of impedance by a bidirectional threshold switch. The threshold switch shows high flexibility (bendable to a radius of about 1 mm) and a high nonlinearity of ≈10 by using a nanocontact structure strategy, which is revealed and validated by molecular dynamics simulations and experiments at variable mechanical stress. Such a flexible electronic switch enables a new generation of large-scale flexible and stretchable electronic and optoelectronic systems.
医疗保健、可穿戴设备和软体机器人对智能系统的需求不断增加，这使得对能够检测压力、温度、应变和其他局部变量的低功耗传感电路的需求日益增长。在最关键的要求中，用于寻址单个传感器设备的矩阵电路必须灵敏、抗干扰，并且在高密度传感阵列中具有灵活性。在此，报道了一种策略，通过双向阈值开关将完全集成的柔性传感阵列的矩阵寻址能力提高，阻抗的最大读出值提高了10倍。该阈值开关通过使用纳米接触结构策略表现出高柔韧性（可弯曲至约1毫米的半径）和约10的高非线性，这在可变机械应力下通过分子动力学模拟和实验得以揭示和验证。这种柔性电子开关推动了新一代大规模柔性和可拉伸电子及光电子系统的发展。
