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Updated: Jan 12, 2026

Stretching Short Sequences of DNA with Constant Force Axial Optical Tweezers

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在纹石墨烯上单链DNA自发拉伸

Hong Zhou¹, Baoyu Li²

¹Department of Medical Laboratory, School of Medicine, Shaoxing University, Shaoxing, 312000, China.

International journal of biological macromolecules

|November 1, 2025

概括

石墨烯纹通过优先吸附有效地拉伸单链DNA (ssDNA),使控制的电泳传输能够改善测序. 这克服了基于纳米孔的ssDNA分析的挑战.

科学领域:

纳米技术纳米技术
材料科学材料科学材料科学
生物物理学的生物物理.

背景情况:

单链DNA (ssDNA) 在溶液中的灵活性导致自我化,复杂化分析.
纳米孔技术有效地拉伸双链DNA (dsDNA) 和蛋白质,但由于不特定的表面相互作用,与ssDNA进行斗争.

研究的目的:

为了研究石墨烯纹作为拉伸ssDNA的平台.
为了实现ssDNA的受控运输和查询,用于测序应用.

主要方法:

利用石墨烯中的准一维纹来创建ssDNA纳米通道.
研究了ssDNA对纹与平面石墨烯区域的吸附亲和力.
在偏差电压下使用电泳传输用于ssDNA操纵.
与原子力显微镜 (AFM) 和扫描道显微镜 (STM) 集成,用于高分辨率成像.

主要成果:

石墨烯纹表明ssDNA基的优先吸附,形成1D纳米通道.
在纹区域具有更强的结合亲和力,通过优化相互作用能量和热波动促进了ssDNA伸展.
通过纳米通道实现了拉伸的ssDNA的电泳传输,并通过偏差电压控制.
由于控制的传输速度,观察到更好的信号噪声比.

结论:

石墨烯纹为ssDNA伸展和受控操纵提供了一个有效的平台.
这种方法克服了ssDNA分析的传统纳米孔方法的局限性.
石墨烯纹纳米通道显示了高分辨率ssDNA测序的巨大潜力.

关键词:

电场是一个电场.石墨烯的纹石墨烯的纹分子动力学模拟的模拟.单链DNA是一种单链DNA.自发拉伸是一种自发的拉伸.

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