利用金属有机框架调节突触可塑性以构建信息可过滤的人工视网膜。
Modulating synaptic plasticity with metal-organic framework for information-filterable artificial retina.
作者信息
Kim Seongchan, Kwon Ohchan, Kim Seonkwon, Jang Seonmin, Yu Seungho, Lee Choong Hoo, Choi Yoon Young, Cho Soo Young, Kim Ki Chul, Yu Cunjiang, Kim Dae Woo, Cho Jeong Ho
机构信息
Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, USA.
Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Republic of Korea.
出版信息
Nat Commun. 2025 Jan 2;16(1):162. doi: 10.1038/s41467-024-55173-2.
Neuroprosthetics equipped with artificial synapses hold promise to address some most intricate medical problems, such as human sensory disorders. Yet, it is necessitated and of paramount importance for neuroprosthetics to be able to differentiate significant and insignificant signals. Here, we present an information-filterable artificial retina system that integrates artificial synapses with a signal-integration device for signal perception and processing with attention. The synaptic weight modulation is rendered through metal-organic framework (MOF) layers, where distinct short-term and long-term properties are predominantly determined by MOF's pore diameter and functionality. Specifically, four types of isoreticular Zr-based MOFs that share ZrO(OH) secondary building units have been systematically examined. It is demonstrated that small pore diameters enhance short-term properties, while large pores, which are characterized by increased ion affinity, sustain long-term properties. Moreover, we demonstrated a 6 × 6 pixel artificial retina by incorporating both short-term and long-term artificial synapses with a signal-integration device. Signal summation by the signal-integration device enables attention-based information processing. The information-filterable artificial retina system developed here emulates human perception processes and holds promise in the fields of neuroprosthetics and advanced artificial intelligence.
配备人工突触的神经假体有望解决一些最为复杂的医学问题,比如人类感觉障碍。然而,神经假体能够区分重要和不重要的信号是必要且至关重要的。在此,我们展示了一种信息可过滤的人工视网膜系统,该系统将人工突触与信号整合装置集成在一起,用于有选择性地感知和处理信号。突触权重调制通过金属有机框架(MOF)层实现,其中不同的短期和长期特性主要由MOF的孔径和功能决定。具体而言,系统研究了四种共享ZrO(OH)二级结构单元的同构Zr基金属有机框架。结果表明,小孔径增强短期特性,而以离子亲和力增加为特征的大孔则维持长期特性。此外,我们通过将短期和长期人工突触与信号整合装置相结合,展示了一个6×6像素的人工视网膜。信号整合装置进行的信号求和实现了基于选择性的信息处理。这里开发的信息可过滤人工视网膜系统模拟了人类感知过程,在神经假体和先进人工智能领域具有前景。