151. Twisted DNA origami-based chiral monolayers for spin filtering
- Author
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Wang, Haozhi, Yin, Fangfei, Li, Linyun, Li, Mingqiang, Fang, Zheng, Sun, Chenyun, Li, Bochen, Shi, Jiye, Li, Jiang, Wang, Lihua, Song, Shiping, Zuo, Xiaolei, Liu, Xiaoguo, and Fan, Chunhai
- Subjects
Physics - Chemical Physics - Abstract
DNA monolayers with inherent chirality play a pivotal role across various domains, including biosensors, DNA chips, and bioelectronics. Nonetheless, conventional DNA chiral monolayers, typically constructed from single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA), often lack structural orderliness and design flexibility at the interface. Structural DNA nanotechnology emerges as a promising solution to tackle these challenges. In this study, we present a strategy for crafting highly adaptable twisted DNA origami-based chiral monolayers. These structures exhibit distinct interfacial assembly characteristics and effectively mitigate the structural disorder of dsDNA monolayers, which is constrained by a limited persistence length of ~50 nm of dsDNA. We highlight the spin-filtering capabilities of four representative DNA origami-based chiral monolayers, demonstrating a maximal one-order-of-magnitude increase in spin-filtering efficiency per unit area compared to conventional dsDNA chiral monolayers. Intriguingly, our findings reveal that the higher-order, tertiary, chiral structure of twisted DNA origami further enhances the spin-filtering efficiency. This work paves the way for the rational design of DNA chiral monolayers.
- Published
- 2023