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塑碗形纳米孔用于Raman检测单个DNA分子在流通中

Yingqi Zhao^1,2, Aliaksandr Hubarevich¹, Angela Federica De Fazio¹

¹Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.

|June 1, 2023

概括

我们开发了碗形的等离子纳米孔,用于使用拉曼光谱检测无标签,单分子DNA检测. 这项技术可以在流通系统中检测连续的DNA基,从而提高检测效率.

科学领域:

纳米技术纳米技术
频谱学是一种光谱学.
分子生物学分子生物学

背景情况:

等离子纳米孔和拉曼光谱正在推进单分子检测.
之前的方法要求在孔隙传递之前,分子被吸附到等离子粒子上.
已经证明了单个DNA基或氨基酸的无标签识别.

研究的目的:

开发一个等离子纳米孔平台,用于直接,无标签的单个DNA分子的拉曼检测.
调查碗形纳米孔对于超微光聚焦和DNA基底检测的能力.
为了提高分子检测效率,使用电流体操纵机制.

主要方法:

制造碗形的等离子金纳米孔.
利用近红外 (NIR) 光聚焦,在纳米孔内创建一个3nm热点.
采用连续分子分析的流通方案.
实施一种用于分子轨迹控制的新型电流体机制.

主要成果:

实现了NIR光的超小聚焦到纳米孔内的3nm点.
在流通条件下成功检测到单个DNA分子沿着连续7个基.
通过对DNA分子对热点进行电流体操纵来证明检测效率的提高.

结论:

碗形的等离子纳米孔使单个DNA分子的直接拉曼检测成为可能.
该技术允许实时对DNA基的无标签测序.
开发的电流体机制显著提高了分子检测的灵敏度和效率.

关键词:

检测 DNA 检测 DNA 的检测.通过流通过流.纳米流体分子捕获装置塑纳米孔的使用方法表面增强的拉曼光谱学

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