Kumari Dimpal, Gupta Anurag, Kumari Karuna, Majumder Shantanu, Ray Soumya Jyoti
Department of Physics, Indian Institute of Technology Patna, Bihta, Patna 801106, India.
ACS Appl Bio Mater. 2025 Mar 17;8(3):2104-2116. doi: 10.1021/acsabm.4c01645. Epub 2025 Mar 4.
With the recent upsurge of data-driven technology, the demand for storage elements has pushed the researchers to explore design of nobel nonvolatile memory devices with diverse functionalities. However, the management of electronic waste has become a prominent challenge due to the rapid growth of the solid-state electronics industry. Biomaterial-based Resistive Random Access Memory (Bio-RRAM) has become one of the most promising devices that can augment the quality of memory devices because of their environmentally benign behavior, biocompatible, nontoxic, transient, transferable, flexible, dissolvable, and biodegradable nature. In this work, we report the fabrication of MIM-structured RRAM devices based on two biomaterials, namely, ovalbumin liquid and acemannan polysaccharide gel, as switching layers. Further, they are characterized by several analytical techniques. The electrical transport measurement revealed bipolar resistive switching behavior, sustainable over 1000 consecutive cycles. The devices demonstrated supreme endurance over 1000 switching cycles with a maximum ON/OFF ratio of ∼10-10. The switching process can be explained through the formation and rupture of conducting filaments formed by the migration of Ag ions. Design of neuro-memristive synapse has been further been explored to demonstrate various neuromorphic functionalities such as long/short-term potentiation, depression, and plasticity. Due to simultaneous presence of resistive switching with the negative differential resiatance (NDR) effect, remarkable endurance, ease of fabrication, cost reduction, and environmental compatibility, neuromorphic functionalities, the RRAM structures could be of potential interest for bioelectronic memory design, wearable and flexible electronics and neuromorphic computing.
随着数据驱动技术最近的兴起，对存储元件的需求促使研究人员探索具有多种功能的新型非易失性存储设备的设计。然而，由于固态电子行业的快速发展，电子废物的管理已成为一个突出的挑战。基于生物材料的电阻式随机存取存储器（Bio-RRAM）因其环境友好行为、生物相容性、无毒、瞬态、可转移、灵活、可溶解和可生物降解的特性，已成为最有前途的存储设备之一，能够提高存储设备的质量。在这项工作中，我们报告了基于两种生物材料（即卵清蛋白液体和乙酰甘露聚糖多糖凝胶）作为开关层的MIM结构RRAM器件的制造。此外，它们通过几种分析技术进行了表征。电输运测量揭示了双极电阻开关行为，可持续超过1000个连续循环。这些器件在超过1000个开关循环中表现出极高的耐久性，最大开/关比约为10-10。开关过程可以通过银离子迁移形成的导电细丝的形成和破裂来解释。进一步探索了神经忆阻器突触的设计，以展示各种神经形态功能，如长/短期增强、抑制和可塑性。由于同时存在电阻开关和负微分电阻（NDR）效应、出色的耐久性、易于制造、成本降低以及环境兼容性、神经形态功能，RRAM结构可能对生物电子存储器设计、可穿戴和柔性电子以及神经形态计算具有潜在的吸引力。
