writer：Jianing Zhang, Dongbao Yao, Wenqiang Hua, Jing Jin, Wei Jiang
keywords：电场, DNA纳米粒子, 自组装, FCC超晶格, 临界逾渗态
source：期刊
specific source：Nano Letters, 2024, 24(44), 13965-13971
Issue time：2024年

摘要：利用交变电场是控制粒子组装的通用方法。尽管DNA带负电荷，但通过电场编程DNA-AuNP组装仍是重大挑战。在DNA-AuNP组装中，精细构建了临界逾渗态，其中DNA键松散连接且对电场敏感。在该状态下，可通过施加高频电场在不改变温度的情况下成功组装DNA-AuNPs形成FCC晶体结构，这对温度敏感体系十分有利。此外，可通过频率和电压等参数调节电场，比温度调控提供更精确的控制。频率和电压可用于精确调节DNA-AuNPs的相结构，使其从溶解态变为无序态或FCC态。这些发现拓展了基于DNA的晶体工程潜力，为电子纳米复合材料和器件揭示了新机会。

Abstract：Using an alternating electric field is a versatile way to control particle assembly. Programming DNA-AuNP assembly via an electric field remains a significant challenge despite the negative charge of DNA. In DNA-AuNP assembly, a critical percolation state is delicately constructed, where the DNA bond is loosely connected and sensitive to electric fields. In this state, an FCC crystal structure can be successfully constructed by applying a high-frequency electric field to assemble DNA-AuNPs without altering the temperature, which is favorable for temperature-sensitive systems. In addition, the regulation of electric fields can be adjusted through parameters such as the frequency and voltage, which offers more precise control than temperature regulation does. The frequency and voltage can be used to precisely tune the phase structure of DNA-AuNPs from dissolved to disordered or FCC. These findings broaden the potential of DNA-based crystal engineering, revealing new opportunities in electronic nanocomposites and devices.

论文链接：https://doi.org/10.1021/acs.nanolett.4c03167