Xue Kainan, Hussain Shabab, Fan Shuaikang, Peng Xinsheng
State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University Hangzhou 310027 P. R. China
Wenzhou Key Laboratory of Novel Optoelectronic and Nanomaterials, Institute of Wenzhou, Zhejiang University Wenzhou 325006 P. R. China.
RSC Adv. 2023 Apr 24;13(19):12646-12653. doi: 10.1039/d3ra01252b.
The simulation of neurons receiving stimulation and transmitting signals by proton conduction has great potential applications in electrochemistry and biology. In this work, copper tetrakis(4-carboxyphenyl)porphyrin (Cu-TCPP), which is a proton conductive metal organic framework (MOF) with photothermal response, is adopted as the structural framework, with the co-incorporation of polystyrene sulfonate (PSS) and sulfonated spiropyran (SSP) to prepare the composite membranes. The resultant PSS-SSP@Cu-TCPP thin-film membranes were used as the logic gates , NO gate, NOR gate and NAND gate because of the photothermal effect of Cu-TCPP MOFs and the photoinduced conformational changes of SSP. This membrane exhibits the high proton conductivity of 1.37 × 10 S cm. Under the conditions of 55 °C and 95% relative humidity (RH), using 405 nm laser irradiation with 400 mW cm and 520 nm laser irradiation with 200 mW cm as inputs, the device can be adjusted between various steady states, and the value of the conductivity is regarded as the output with different thresholds in different logic gates. Before and after laser irradiation, the electrical conductivity changes dramatically, and the ON/OFF switching ratio reached 1068. The application of three logic gates is realized by constructing circuits with LED lights. Depending on the convenience of light and the easy measurement of conductivity, this kind of device with light source as input and electrical signal as output provides the possibility to realize the remote control of chemical sensors and complex logic gates devices.
通过质子传导对神经元接收刺激和传输信号进行模拟在电化学和生物学领域具有巨大的潜在应用价值。在这项工作中，采用具有光热响应的质子传导金属有机框架（MOF）——四（4-羧基苯基）卟啉铜（Cu-TCPP）作为结构框架，并共掺入聚苯乙烯磺酸盐（PSS）和磺化螺吡喃（SSP）来制备复合膜。由于Cu-TCPP MOF的光热效应和SSP的光致构象变化，所得的PSS-SSP@Cu-TCPP薄膜被用作逻辑门、非门、或非门和与非门。该膜具有1.37×10 S cm的高质子传导率。在55°C和95%相对湿度（RH）条件下，以400 mW cm的405 nm激光照射和200 mW cm的520 nm激光照射作为输入，该器件可在各种稳态之间调节，电导率值被视为不同逻辑门中具有不同阈值的输出。激光照射前后，电导率变化显著，开/关切换比达到1068。通过用发光二极管构建电路实现了三种逻辑门的应用。基于光的便利性和电导率易于测量的特点，这种以光源为输入、电信号为输出的器件为实现化学传感器和复杂逻辑门器件的远程控制提供了可能性。
