Ko Jaehyoung, Kim Soeun, Kim Daeun, Lim Taeho, Jin Soyeong, Jeong Youngdo, Joo Yongho, Cho Sangho
Functional Composite Materials Research Center, Korea Institute of Science and Technology, Jeonbuk, 55324, Republic of Korea.
Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
Angew Chem Int Ed Engl. 2025 Apr 28:e202422826. doi: 10.1002/anie.202422826.
Electronic devices often demand high reliability and longevity, but they also contribute significantly to electronic waste. Physically transient electronics have thus emerged as a promising alternative in future electronics, particularly in wearable and implantable bioelectronics. In these applications, memristive materials have gained significant attention for their potential to realize neuromorphic systems that offer energy-efficient, hardware-based parallel processing. By integrating memristive capabilities with transient behavior, this study bridges these two cutting-edge fields, creating materials that not only enable advanced computing but also dissociate sustainably. Additionally, we leverage the unique features of soft materials for their tunability, biocompatibility, and cost-effectiveness, which collectively enhance this integration. In this work, we first illustrate molecular engineering strategy on a radical polymer. We then proceed to two-terminal devices therefrom, which exhibit exceptional memory performance of >10 on/off ratio, >10 s state retention, and stability over 250 DC sweep cycles. A flexible, optically transparent, and physically transient crossbar arrays are also developed, which maintain the performance through >3,000 bending cycles and fully dissociate in water at room temperature. This work represents an advancement toward a biorealistic platform with substantial multifunctionality, making it readily translatable to future wearable and implantable neuromorphic devices.
电子设备通常需要高可靠性和长寿命，但它们也对电子垃圾的产生有很大影响。因此，物理瞬态电子学已成为未来电子学中一种有前途的替代方案，特别是在可穿戴和植入式生物电子学领域。在这些应用中，忆阻材料因其实现神经形态系统的潜力而备受关注，这种系统能提供节能的、基于硬件的并行处理能力。通过将忆阻功能与瞬态行为相结合，本研究将这两个前沿领域联系起来，创造出不仅能实现先进计算而且能可持续分解的材料。此外，我们利用软材料的独特特性，包括其可调性、生物相容性和成本效益，共同增强了这种整合。在这项工作中，我们首先阐述了一种自由基聚合物的分子工程策略。然后我们由此制备了两终端器件，其表现出超过10的开/关比、超过10秒的状态保持以及在250次直流扫描循环中的稳定性等优异的记忆性能。我们还开发了一种柔性、光学透明且物理瞬态的交叉阵列，其在超过3000次弯曲循环中保持性能，并在室温下于水中完全分解。这项工作代表了朝着具有实质性多功能性的生物现实平台迈出的一步，使其易于转化为未来的可穿戴和植入式神经形态器件。
