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题名: Smectic phase in suspensions of gapped DNA duplexes
作者: Salamonczyk, Miroslaw; Zhang, Jing; Portale, Giuseppe; Zhu, Chenhui; Kentzinger, Emmanuel; Gleeson, James T.; Jakli, Antal; De Michele, Cristiano; Dhont, Jan K. G.; Sprunt, Samuel; Stiakakis, Emmanuel
刊名: NATURE COMMUNICATIONS
出版日期: 2016-11-15
卷号: 7, 期号:0, 页码:-
DOI: 10.1038/ncomms13358
部门归属: 环境纳米材料实验室
英文摘要: Smectic ordering in aqueous solutions of monodisperse stiff double-stranded DNA fragments is known not to occur, despite the fact that these systems exhibit both chiral nematic and columnar mesophases. Here, we show, unambiguously, that a smectic-A type of phase is formed by increasing the DNA's flexibility through the introduction of an unpaired single-stranded DNA spacer in the middle of each duplex. This is unusual for a lyotropic system, where flexibility typically destabilizes the smectic phase. We also report on simulations suggesting that the gapped duplexes (resembling chain-sticks) attain a folded conformation in the smectic layers, and argue that this layer structure, which we designate as smectic-fA phase, is thermodynamically stabilized by both entropic and energetic contributions to the system's free energy. Our results demonstrate that DNA as a building block offers an exquisitely tunable means to engineer a potentially rich assortment of lyotropic liquid crystals.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36003
Appears in Collections:环境纳米材料实验室_期刊论文

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Recommended Citation:
Salamonczyk, Miroslaw,Zhang, Jing,Portale, Giuseppe,et al. Smectic phase in suspensions of gapped DNA duplexes[J]. NATURE COMMUNICATIONS,2016,7(0):-.
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