基于双环形光捕获的气溶胶单颗粒LIBS分析方法

程雪梅; 张影; 李家彦

doi:10.16152/j.cnki.xdxbzr.2025-06-009

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基于双环形光捕获的气溶胶单颗粒LIBS分析方法

青年编委专刊 | 更新时间：2026-01-02

- 基于双环形光捕获的气溶胶单颗粒LIBS分析方法
- Single-particle LIBS analysis method for aerosol based on dual-annular beam trapping
- 西北大学学报（自然科学版） 2025年55卷第6期页码：1309-1319
- 作者机构：
  
  1.西北大学　光子学与光子技术研究所，陕西　西安　710069
  2.武警工程大学　基础部，陕西　西安　710086
- 作者简介：
  
  [ "程雪梅，博士，西北大学光子学与光子技术研究所副教授，硕士生导师，陕西省青年科技新星。主要从事非线性光学、空间光场调控与应用等方面的研究与教学工作。曾在德国电子同步辐射研究所（DESY）作访问学者和博士后研究。主持和参与国家重大科研仪器研制等多项科研项目，在Analytical Chemistry、Photonics Research、Applied Physics Letters、Talanta等期刊发表论文30余篇，获授权发明专利10余项。" ]
- 基金信息：
  
  国家自然科学基金(51927804);陕西省基础研究计划项目(2024JC-YBMS-005)
- DOI：10.16152/j.cnki.xdxbzr.2025-06-009
  中图分类号： O433.1
- 收稿：2025-09-10，
  
  纸质出版：2025-12-25
- 稿件说明：
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程雪梅, 张影, 李家彦. 基于双环形光捕获的气溶胶单颗粒LIBS分析方法[J]. 西北大学学报（自然科学版）, 2025,55(6):1309-1319.

CHENG Xuemei, ZHANG Ying, LI Jiayan. Single-particle LIBS analysis method for aerosol based on dual-annular beam trapping[J]. Journal of Northwest University (Natural Science Edition), 2025, 55(6): 1309-1319.
程雪梅, 张影, 李家彦. 基于双环形光捕获的气溶胶单颗粒LIBS分析方法[J]. 西北大学学报（自然科学版）, 2025,55(6):1309-1319. DOI： 10.16152/j.cnki.xdxbzr.2025-06-009.

CHENG Xuemei, ZHANG Ying, LI Jiayan. Single-particle LIBS analysis method for aerosol based on dual-annular beam trapping[J]. Journal of Northwest University (Natural Science Edition), 2025, 55(6): 1309-1319. DOI： 10.16152/j.cnki.xdxbzr.2025-06-009.

摘要

气溶胶对生命健康、生态环境及气候变化有着重要影响。对单个大气气溶胶颗粒的物化学组分进行原位监测是研究污染物形成和演化机制的重要手段，对于污染物溯源以及精准防控具有重要意义。光捕获技术结合激光诱导击穿光谱技术（laser-induced breakdown spectroscopy，LIBS）是近些年发展起来的有效的单颗粒分析手段，然而受限于光捕获效率和稳定性，目前仍然存在分析效率低，特别是难以对透明颗粒进行分析的问题。为此，提出“双环形光捕获+LIBS技术”的单颗粒分析方法，利用2束反向水平传输的环形光束捕获方案，有效克服了气相环境中光散射力过大导致的颗粒捕获效率低和稳定性差的问题，在同一装置上实现了对透明颗粒和吸光性颗粒的稳定捕获，进而提高了单颗粒分析效率和普适性。该方法可以广泛应用于气相环境单颗粒原位分析中，助力大气颗粒污染物的形成机制研究以及污染物溯源。

Abstract

Aerosols have significant impacts on human health

ecological environments

and climate change. In situ monitoring of the physical and chemical composition of individual atmospheric aerosol particles is crucial for studying the formation and evolution mechanisms of pollutants

playing a vital role in traceability and precise prevention and control of pollution. Optical trapping technology combined with laser-induced breakdown spectroscopy (LIBS) has emerged in recent years as an effective single-particle analysis method. However

limited by optical trapping efficiency and stability

current approaches still suffer from low analytical efficiency

particularly in analyzing transparent particles. To address this

this study proposes a single-particle analysis method based on "dual-ring optical trapping+LIBS technology". Using a trapping scheme with two counter-propagating horizontal ring-shaped beams

it effectively overcomes the issues of low trapping efficiency and poor stability caused by excessive optical scattering forces in gaseous environments. This setup enables stable trapping of both transparent and light-absorbing particles within the same device

thereby improving the efficiency and universality of single-particle analysis. This method can be widely applied for in situ analysis of single particles in gaseous environments

contributing to research on the formation mechanisms of atmospheric particulate pollutants and pollution traceability.

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references

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