Zhang Qian, Wang Yulong, Nickle Cameron, Zhang Ziyu, Leoncini Andrea, Qi Dong-Chen, Sotthewes Kai, Borrini Alessandro, Zandvliet Harold J W, Del Barco Enrique, Thompson Damien, Nijhuis Christian A
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, Singapore.
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China.
Nat Commun. 2024 Sep 27;15(1):8300. doi: 10.1038/s41467-024-52496-y.
To develop new types of dynamic molecular devices with atomic-scale control over electronic function, new types of molecular switches are needed with time-dependent switching probabilities. We report such a molecular switch based on proton-coupled electron transfer (PCET) reaction with giant hysteric negative differential resistance (NDR) with peak-to-valley ratios of 120 ± 6.6 and memory on/off ratios of (2.4 ± 0.6) × 10. The switching dynamics probabilities are modulated by bias voltage sweep rate and can also be controlled by pH and relative humidity, confirmed by kinetic isotope effect measurements. The demonstrated dynamical and environment-specific modulation of giant NDR and memory effects provide new opportunities for bioelectronics and artificial neural networks.
为了开发对电子功能具有原子尺度控制的新型动态分子器件，需要具有随时间变化的开关概率的新型分子开关。我们报道了一种基于质子耦合电子转移（PCET）反应的分子开关，它具有巨大的滞后负微分电阻（NDR），峰谷比为120±6.6，记忆开/关比为(2.4±0.6)×10。开关动力学概率由偏置电压扫描速率调制，也可由pH值和相对湿度控制，这通过动力学同位素效应测量得到证实。所展示的巨大NDR和记忆效应的动态和环境特异性调制为生物电子学和人工神经网络提供了新的机遇。
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