Biomaterial-based devices have demonstrated versatility in various applications and have drawn recent considerable attention. In this study, we present non-volatile resistive switching memory devices based on a natural-derived DNA biomaterial. The structure consists of a DNA-based biomaterial layer sandwiched between two electrodes, where the DNA-based biomaterial is solution-processed without sequence control or external doping of nanoparticles. The fabricated device was tested at room temperature without encapsulation and exhibited a reliable resistive switching behavior and multi-level operation with low switching voltages, ${10}^4$ s retention time, and more than 200 cycles in memory endurance testing. Our demonstration shows that reliable memory devices can be realized using only one layer of natural DNA biomaterial, without the need for composite layers. Our characterization also provides underlying physics that may be exploited for the design and fabrication of natural DNA-based optoelectronics.

基于生物材料的设备已在各种应用中显示出多功能性，最近引起了相当大的关注。在这项研究中，我们介绍了基于天然DNA生物材料的非易失性电阻式开关存储设备。该结构由夹在两个电极之间的基于DNA的生物材料层组成，其中基于DNA的生物材料经过固溶处理而无需序列控制或纳米粒子的外部掺杂。所制造的器件在没有封装的情况下在室温下进行了测试，并表现出可靠的电阻开关性能以及低开关电压下的多级操作，${10}^4$的保留时间，并且在内存耐久度测试中超过200个周期。我们的演示表明，仅使用一层天然DNA生物材料即可实现可靠的存储设备，而无需复合层。我们的表征还提供了可用于设计和制造基于天然DNA的光电子技术的基础物理学。