Conductivity modulation in sodium caseinate biopolymer based resistive switching write-once-read-many times (WORM) memory device

IF 2.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Organic Electronics Pub Date : 2024-07-25 DOI:10.1016/j.orgel.2024.107101

Mainak Saha , Subham Dey , Sk Masum Nawaz , Abhijit Mallik

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Abstract

Conductivity modulations in resistive random access memory (RRAM) devices are currently being extensively investigated for neuromorphic applications. In this work, a detailed investigation of the conductivity modulation in a bio-material-based resistive-switching write-once-read-many times (WORM) memory device is reported for the first time. Sodium caseinate (NaCas) biopolymer, extracted from the bovine milk, is used as the active layer for the WORM device. Our investigations reveal that conductance modulation can be achieved in Ag/NaCas/ITO device structure that exhibits WORM characteristics. It is also demonstrated that the NaCas-based WORM device is capable of exhibiting synaptic emulations like potentiation-depression, short-term-memory to long-term-memory and paired-pulse-facilitation, similar to that reported for the bipolar resistive switching and threshold switching memory devices. Such conductivity modulation in the WORM device may be attributed to the reversible partial alignment of casein micelles present in the active layer.

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基于酪蛋白酸钠生物聚合物的电阻开关式一次写入多次读取（WORM）存储器件中的电导率调制功能

目前，人们正在广泛研究电阻式随机存取存储器（RRAM）器件中的电导率调制，以用于神经形态应用。在这项工作中，首次报道了对基于生物材料的电阻开关式一次写入多次读取（WORM）存储器件中电导率调制的详细研究。从牛乳中提取的酪蛋白酸钠（NaCas）生物聚合物被用作 WORM 器件的活性层。我们的研究发现，在具有 WORM 特性的 Ag/NaCas/ITO 器件结构中可以实现电导调制。研究还表明，基于 NaCas 的 WORM 器件能够表现出突触模拟，如电位抑制、短期记忆到长期记忆和配对脉冲促进，与双极电阻开关和阈值开关记忆器件的报告类似。WORM 器件中的这种电导率调制可能归因于活性层中存在的酪蛋白胶束的可逆部分排列。

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来源期刊

Organic Electronics 工程技术-材料科学：综合

CiteScore

6.60

自引率

6.20%

发文量

238

审稿时长

44 days

期刊介绍： Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc. Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.