Dlamini Zolile Wiseman, Vallabhapurapu Sreedevi, Nambooze Jennifer, Wilhelm Anke, Erasmus Elizabeth, Mogale Refilwe, Swart Marthinus Rudi, Vallabhapurapu Vijaya Srinivasu, Mamba Bheki, Setlalentoa Wendy, Mahule Tebogo Sfiso, Pellegrini Vanessa de Oliveira Arnoldi, Cronje Shaun, Polikarpov Igor
Department of Maths, Science and Technology Education, Central University of Technology, Bloemfontein 9300, South Africa.
School of Computing, University of South Africa, Florida Park 1710, South Africa.
Polymers (Basel). 2024 Oct 21;16(20):2949. doi: 10.3390/polym16202949.
Biodegradable electronic devices play a crucial role in addressing the escalating issue of electronic waste accumulation, which poses significant environmental threats. In this study, we explore the utilization of a methanol-based extract of the plant blended with a carboxymethyl cellulose biopolymer to produce a biodegradable and environmentally friendly functional material for a resistive switching memory system using silver and tungsten electrodes. Our analyses revealed that these two materials chemically interact to generate a perfect composite with near semiconducting optical bandgap (4.01 eV). The resultant device exhibits O-type memory behavior, with a low ON/OFF ratio, strong endurance (≥103 write/erase cycles), and satisfactory (≥103) data retention. Furthermore, through a comprehensive transport mechanism analysis, we observed the formation of traps in the composite that significantly improved conduction in the device. In addition, we established that altering the voltage amplitude modifies the concentration of traps, leading to voltage amplitude-driven multiple resistance states. Overall, our findings underscore the potential of functionalizing polymers that can be functionalized by incorporating plant extracts, resulting in biodegradable and nonvolatile memory devices with promising performance metrics.
可生物降解电子设备在解决电子垃圾堆积这一日益严重的问题中发挥着关键作用，电子垃圾堆积对环境构成了重大威胁。在本研究中，我们探索了将植物的甲醇提取物与羧甲基纤维素生物聚合物混合，以生产一种可生物降解且环保的功能材料，用于采用银和钨电极的电阻式开关记忆系统。我们的分析表明，这两种材料发生化学相互作用，生成了一种具有接近半导体光学带隙（4.01电子伏特）的完美复合材料。所得器件呈现出O型记忆行为，具有低开/关比、强耐久性（≥103次写/擦除循环）和令人满意的（≥103）数据保持能力。此外，通过全面的传输机制分析，我们观察到复合材料中形成了陷阱，这显著改善了器件中的传导。此外，我们确定改变电压幅度会改变陷阱浓度，从而导致电压幅度驱动的多个电阻状态。总体而言，我们的研究结果强调了通过掺入植物提取物来功能化聚合物的潜力，从而产生具有有前景性能指标的可生物降解和非易失性记忆器件。
