用于非易失性存储器的壳聚糖可生物降解ReRAM

Abiodun Temidayo Fabiyi, S. Vallabhapurapu, Issac O Osunmakinde
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引用次数: 0

摘要

采用简单的自旋涂层技术,制备了基于银纳米粒子的壳聚糖纳米复合材料。在低至0.23V的工作电压下,观察到在ON和OFF状态之间的切换,在第一个周期中观察到超过3个数量级的高ON/OFF比。此外,我们还观察到在第二个周期中从ON状态到OFF状态的多电平切换,在低至~ 0.6V的开关电压下,开/关比约为5个数量级。为了理解开关,我们从传导机制的角度分析了I-V特性。一般来说,导通是在开关前的跳变型。特别是在第二个周期中,当从LRS切换到HRS (ON到OFF状态)时,导通从ON状态的跳变到OFF状态的欧姆行为。这种传导行为的完全改变可能是观察到5个数量级的巨大开/关比的原因。这种高开/关比在壳聚糖-银纳米复合体系中是相当令人鼓舞的
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Biodegradable ReRAM based on chitosan for nonvolatile memory application
ReRAM cell based on Silver nano particle incorporated Chitosan nano composite, using a simple spin coating technique. Switching between ON and OFF states were observed at operating voltage as low as 0.23V A high ON/OFF ratio of more than 3 orders was observed in the first cycle. Further, we also observed a multilevel switching from ON state to OFF state in the second cycle, with an ON/OFF ratio of about 5 orders of magnitude at again a switching voltage as low as ~ 0.6V. To understand the switching, we analysed the I-V characteristics in terms of conduction mechanisms. In general the conduction is hopping type just before switching. Particularly in the second cycle, when the switching occurs from LRS to HRS (ON to OFF states), conduction changes from hopping type in On state to Ohmic behavior in the OFF state. This complete change of conduction behavior may be the reason for the observed huge ON/OFF ratio of 5 orders of magnitude. This high ON/OFF ratio is quite encouraging in this Chitosan-Silver nano composite system
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