State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials, Jiangsu Key Laboratory for Biosensors, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China.
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
J Phys Chem Lett. 2022 Jul 28;13(29):6721-6730. doi: 10.1021/acs.jpclett.2c01737. Epub 2022 Jul 18.
Recently, silver nanoparticles (AgNPs) have been widely applied in sterilization due to their excellent antibacterial properties. However, AgNPs require rigorous storage conditions because their antibacterial performances are significantly affected by environmental conditions. Instant fabrication provides a remedy for this drawback. In this study, we propose a self-powered electrodeposition system to synthesize sub-10-nm AgNPs, consisting of a triboelectric nanogenerator (TENG) as the self-powered source, a capacitor for storing electrical energy from the TENG, and an electrochemical component for electrodeposition. The self-powered system with larger capacitance and discharging voltage tends to deliver smaller AgNPs due to the nucleation mechanism dominated by current density. Furthermore, antibacterial tests reveal that compared to direct current (DC) electrodeposition, the TENG-based electrodeposition can synthesize finer-sized AgNPs (<10 nm) with overwhelming antibacterial effect against and (with 100% efficiency at 2 h). This work provides a new strategy for the self-powered, instant, and controllable electrodeposition of nanoparticles.
最近，由于银纳米粒子（AgNPs）具有优异的抗菌性能，因此被广泛应用于杀菌领域。然而，AgNPs 需要严格的储存条件，因为其抗菌性能会受到环境条件的显著影响。即时制造为这一缺点提供了一种补救措施。在本研究中，我们提出了一种自供电的电沉积系统，用于合成亚 10nm 的 AgNPs，该系统由一个作为自供电源的摩擦纳米发电机（TENG）、一个用于存储 TENG 电能的电容器以及一个用于电沉积的电化学组件组成。由于电流密度主导的成核机制，具有更大电容和放电电压的自供电系统往往会产生更小的 AgNPs。此外，抗菌测试表明，与直流（DC）电沉积相比，基于 TENG 的电沉积可以合成更小尺寸的 AgNPs（<10nm），对 和 具有压倒性的抗菌效果（在 2 小时内达到 100%的效率）。这项工作为自供电、即时和可控的纳米粒子电沉积提供了一种新策略。
