High-specificity SERS sensing with magnet-powered hierarchically structured micromotors.

IF 3.1 2区物理与天体物理 Q2 OPTICS Optics letters Pub Date : 2024-12-15 DOI:10.1364/OL.543066

Xingce Fan, Xing Zhao, Xiao Tang, Guoqun Li, Yunjia Wei, Dexiang Chen, Fan Kong, Leilei Lan, Jiawei Wang, Qi Hao, Teng Qiu

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Abstract

This work reports a hierarchically structured micromotor (HSM) surface-enhanced Raman scattering (SERS) platform comprising 3D tubular configurations with nanostructured outer walls. The HSMs can be powered by an external magnetic field in solution to enrich molecules with promoted adsorption efficiency. The nanostructured outer wall serves as containers to collect molecules and produce strong localized surface plasmon resonance to intensify Raman of the enriched molecules. Further coupling of HSMs after molecular enrichment can produce additional plasmonic hotspots at the sites where the molecules were enriched, providing a solution to manipulate molecules to enter the plasmonic hotspot region. Moreover, functionalizing specific molecules on the outer wall of HSMs enables high-specificity SERS sensing for benzaldehyde (BA) and Cu²⁺ ions in liquid. This SERS platform demonstrates great potential for practical applications in biochemical analysis and environmental monitoring, offering a rapid and sensitive tool for detecting low-concentration analytes in liquid.

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利用磁力驱动的分层结构微电机实现高特异性 SERS 传感。

这项研究报告了一种分层结构微电机（HSM）表面增强拉曼散射（SERS）平台，该平台由具有纳米结构外壁的三维管状构型组成。HSM 可通过溶液中的外部磁场来富集分子，从而提高吸附效率。纳米结构外壁可作为收集分子的容器，并产生强烈的局部表面等离子体共振，从而增强富集分子的拉曼效应。分子富集后进一步耦合 HSMs，可在富集分子的位置产生额外的等离子热点，为操纵分子进入等离子热点区域提供了解决方案。此外，在 HSM 外壁上对特定分子进行官能化处理，可实现对液体中苯甲醛（BA）和 Cu2+ 离子的高特异性 SERS 传感。这种 SERS 平台在生化分析和环境监测的实际应用中展现出巨大的潜力，为检测液体中的低浓度分析物提供了一种快速、灵敏的工具。

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来源期刊

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.