Login / Signup

Generic dynamic molecular devices by quantitative non-steady-state proton/water-coupled electron transport kinetics.

Ziyan WangZheyang LiChengtai LiXuan JiXianneng SongXi YuLejia WangWenping Hu
Published in: Proceedings of the National Academy of Sciences of the United States of America (2023)
Dynamic molecular devices operating with time- and history-dependent performance raised new challenges for the fundamental study of microscopic non-steady-state charge transport as well as functionalities that are not achievable by steady-state devices. In this study, we reported a generic dynamic mode of molecular devices by addressing the transient redox state of ubiquitous quinone molecules in the junction by proton/water transfer. The diffusion limited slow proton/water transfer-modulated fast electron transport, leading to a non-steady-state transport process, as manifested by the negative differential resistance, dynamic hysteresis, and memory-like behavior. A quantitative paradigm for the study of the non-steady-state charge transport kinetics was further developed by combining the theoretical model and transient state characterization, and the principle of the dynamic device can be revealed by the numerical simulator. On applying pulse stimulation, the dynamic device emulated the neuron synaptic response with frequency-dependent depression and facilitation, implying a great potential for future nonlinear and brain-inspired devices.
Keyphrases
  • electron transfer
  • multiple sclerosis
  • blood pressure
  • high resolution
  • depressive symptoms
  • human health
  • resting state
  • sleep quality
  • physical activity
  • brain injury
  • blood brain barrier
  • white matter