Building a nanostructure with reversible motions using photonic energy.

Building a nanostructure with reversible motions using photonic energy.
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DOI:
10.1021/nn302388e
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发表时间:
2012-09-25
期刊:
影响因子:
17.1
通讯作者:
Tan, Weihong
Tan, Weihong
中科院分区:
材料科学1区
文献类型:
--
作者:
You, Mingxu;Huang, Fujian;Chen, Zhuo;Wang, Ruo-Wen;Tan, Weihong

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最近,DNA分子的特异性杂交已被用于构建自组装装置,例如模仿自然界中细胞蛋白质马达的机械装置。在这里,我们提出了一种新的光能DNA机械装置,该装置基于偶氮苯部分的光异构化和脚趾介导的链置换。这种自主可控的装置能够移动到轨道的两端,只需切换光照射的波长,紫外线(365 Nm)或可见光(>450 nm)。这种光控策略可以很容易地解决步进式步行设备的一个主要技术挑战:多路径系统中的路径选择。这项研究中使用的原理,光异构化诱导的脚趾长度切换,可以进一步用于其他机械设备的设计,最终目标是在货物运输和宏观运动方面与分子马达相媲美。
Recently, the specific hybridization of DNA molecules has been used to construct self-assembled devices, e.g., the mechanical device to mimic cellular protein motors in nature. Here, we present a new light-powered DNA mechanical device based on the photoisomerization of azobenzene moieties and toehold-mediated strand displacement. This autonomous and controllable device is capable of moving towards either end of the track, simply by switching the wavelength of light irradiation, either UV (365nm) or visible (>450nm). This light-controlled strategy can easily solve one main technical challenge for step-wise walking devices: the selection of routes in multipath systems. The principle employed in this study, photoisomerization-induced toehold length switching, could be further useful in the design of other mechanical devices, with the ultimate goal of rivaling molecular motors for cargo transport and macroscopic movement.
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