Department of Physics and Institute of Basic Sciences and Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Department of Biomedical Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
Adv Sci (Weinh). 2023 May;10(14):e2206848. doi: 10.1002/advs.202206848. Epub 2023 Mar 22.
Natural polymer-based and self-powered bioelectronic devices are attracting attention owing to an increased interest in human health monitoring and human-machine interfaces. However, obtaining both high efficiency and multifunctionality from a single natural polymer-based bioelectronics platform is still challenging. Here, molybdenum disulfide (MoS ) nanoparticle- and carbon quantum dot (CQDs)-incorporated deoxyribonucleic acid (DNA) nanocomposites are reported for energy harvesting, motion sensing, and charge storing. With nanomaterial-based electrodes, the MoS -CQD-DNA nanocomposite exhibits a high triboelectric open-circuit voltage of 1.6 kV (average) and an output power density of 275 mW cm , which is sufficient for turning on hundred light-emitting diodes and for a highly sensitive motion sensing. Notably, the triboelectric performance can be tuned by external stimuli (light and thermal energy). Thermal and photon energy absorptions by the nanocomposite generate additional charges, resulting in an enhanced triboelectric performance. The MoS -CQD-DNA nanocomposite can also be applied as a capacitor material. Based on the obtained electronic properties, such as capacitances, dielectric constants, work functions, and bandgaps, it is possible that the charges generated by the MoS -CQD-DNA triboelectric nanogenerator can be stored in the MoS -CQD-DNA capacitor. A new way is presented here to expand the application area of self-powered devices in wearable and implantable electronics.
基于天然聚合物的自供电生物电子设备由于人们对人体健康监测和人机接口的兴趣增加而受到关注。然而，从单一的基于天然聚合物的生物电子平台获得高效率和多功能性仍然具有挑战性。在这里，报告了包含二硫化钼 (MoS )纳米粒子和碳量子点 (CQDs) 的脱氧核糖核酸 (DNA) 纳米复合材料，用于能量收集、运动感应和电荷存储。使用基于纳米材料的电极，MoS -CQD-DNA 纳米复合材料表现出 1.6 kV（平均）的高摩擦开路电压和 275 mW cm 的输出功率密度，足以打开数百个发光二极管并实现高灵敏度的运动感应。值得注意的是，摩擦电性能可以通过外部刺激（光和热能）进行调节。纳米复合材料对热和光子能量的吸收会产生额外的电荷，从而提高摩擦电性能。MoS -CQD-DNA 纳米复合材料也可用作电容器材料。基于获得的电子特性，如电容、介电常数、功函数和能带隙，可以将 MoS -CQD-DNA 摩擦电纳米发电机产生的电荷存储在 MoS -CQD-DNA 电容器中。这里提出了一种新方法，可以扩展自供电设备在可穿戴和植入式电子设备中的应用领域。
