Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, Republic of Korea.
ACS Appl Mater Interfaces. 2017 Feb 22;9(7):6207-6212. doi: 10.1021/acsami.6b14566. Epub 2017 Feb 7.
The growing interest in bioinspired and sustainable electronics has induced research on biocompatible and biodegradable materials. However, conventional electronic devices have been restricted due to their nonbiodegradable and sometimes harmful and toxic materials, which can even cause environmental issues. Here, we report a resistive switching random access memory (ReRAM) device based on lignin, which is a biodegradable waste product of the paper industry. The active layer of the device can be easily formed using a simple solution process on a plastic substrate. The memory devices show stable bipolar resistive switching behavior with good endurance and retention. Appropriate control of the maximum reset voltage and compliance current can yield multibit data storage capability with at least four resistance states, which can be exploited to realize a high-density memory device. The resistive switching mechanism may be a result of formation and rupture of carbon-rich filaments. These results suggest that lignin is a promising candidate material for an inexpensive and environmentally benign ReRAM device. We believe that this study can initiate a new route toward development of biocompatible and flexible electronics.
对仿生和可持续电子产品日益增长的兴趣促使人们对生物相容性和可生物降解材料进行研究。然而，由于传统电子设备使用的不可生物降解材料，有时还含有有害物质和有毒材料，这甚至会引发环境问题。在这里，我们报告了一种基于木质素的电阻式随机存取存储器（ReRAM）器件，木质素是造纸工业的一种可生物降解的废物。该器件的有源层可以使用简单的溶液工艺在塑料衬底上轻松形成。该存储器件表现出稳定的双极电阻开关行为，具有良好的耐久性和保持性。适当控制最大重置电压和符合电流可以实现至少具有四个电阻状态的多位数据存储能力，这可用于实现高密度存储器件。电阻开关机制可能是富碳丝的形成和断裂的结果。这些结果表明木质素是一种很有前途的廉价且环保的 ReRAM 器件候选材料。我们相信，这项研究可以为开发生物相容性和柔性电子产品开辟新途径。
