Department of Chemistry, Ecole Centrale School of Engineering, Mahindra University, Hyderabad 500043, India.
Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur 416004, India.
ACS Appl Bio Mater. 2023 May 15;6(5):1763-1773. doi: 10.1021/acsabm.2c01073. Epub 2023 Mar 28.
We report a memory device based on organic-inorganic hybrid cellulose-TiCT MXene composite hydrogel (CMCH) as a switching layer sandwiched between Ag top and FTO bottom electrodes. The device (Ag/CMCH/FTO) was fabricated by a simple, solution-processed route and exhibits reliable and reproducible bipolar resistive switching. Multilevel switching behavior was observed at low operating voltages (±0.5 to ±1 V). Furthermore, the capacitive-coupled memristive characteristics of the device were corroborated with electrochemical impedance spectroscopy and this affirmed the filamentary conduction switching mechanism (LRS-HRS). The synaptic functions of the CMCH-based memory device were evaluated, wherein potentiation/depression properties over 8 × 10 electric pulses were observed. The device also exhibited spike time-dependent plasticity-based symmetric Hebbian learning rule of a biological synapse. This hybrid hydrogel is expected to be a potential switching material for low-cost, sustainable, and biocompatible memory storage devices and artificial synaptic applications.
我们报告了一种基于有机-无机杂化纤维素-TiCT MXene 复合水凝胶（CMCH）的忆阻器件，该器件作为一个开关层夹在 Ag 顶电极和 FTO 底电极之间。该器件（Ag/CMCH/FTO）是通过简单的溶液处理方法制备的，表现出可靠和可重复的双极性电阻开关特性。在低工作电压（±0.5 至±1 V）下观察到多电平开关行为。此外，通过电化学阻抗谱证实了器件的电容耦合阻变特性，这证实了丝状传导开关机制（LRS-HRS）。评估了基于 CMCH 的忆阻器件的突触功能，观察到超过 8×10 个电脉冲的增强/抑制特性。该器件还表现出基于尖峰时间依赖可塑性的对称海伯学习规则，这是生物突触的特性。这种杂化水凝胶有望成为用于低成本、可持续和生物相容的存储器件和人工突触应用的潜在开关材料。
