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Development and Application of Laser-Induced Breakdown Spectroscopy

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (20 November 2024) | Viewed by 1431

Special Issue Editor


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Guest Editor
Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis 88020-302, SC, Brazil
Interests: laser; spectroscopy; LIBS; LIFS; laser ablation; fluorescence
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Laser-induced breakdown spectroscopy (LIBS) is a multi-element technique that uses laser pulses focused on the sample surface to create a plasma that emits radiation/light, primarily in the UV and visible spectrum. This radiation contains information about the chemical composition of the sample, and the atoms and molecules present in the sample can be identified and quantified by analyzing the spectral lines of this light source. It is a very versatile technology and has been used in agriculture, industry, food, heritage, environment, geochemistry, health, and more over the past few decades.

This technology can quickly and accurately detect and identify chemical components, that is, it can provide a "chemical fingerprint" of the material being analyzed, allowing real-time characterization of various organic and inorganic materials without sample preparation and analysis, with high sensitivity and specificity. LIBS systems have attracted interest from the scientific community in recent decades due to their enormous analytical potential. Compared with other contemporary technologies, such as inductively coupled plasma mass spectrometry or flame atomic absorption spectrometry, LIBS has overall advantages in practical operations, such as little or no sample preparation, real-time, all-element measurements, and remote sensing. Therefore, LIBS can be considered the most promising online/in situ real-time elemental analysis technology. The aim of this Special Issue is to showcase research on LIBS technology, focusing on applications and not limited to specific fields. Authors are encouraged to submit relevant research articles or reviews on the above topics.

Prof. Dr. Gustavo Nicolodelli
Guest Editor

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Keywords

  • laser-induced breakdown spectroscopy
  • LIBS
  • real-time elemental analysis
  • multi-element techniques

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Published Papers (1 paper)

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Research

12 pages, 4521 KiB  
Article
Study on the Impact of Air Pressure on the Laser-Induced Breakdown Spectroscopy of Intumescent Fireproof Coatings
by Jun Wang, Honglin Jian, Shouhe Wang, Fengzhen Zhang and Xilin Wang
Appl. Sci. 2024, 14(19), 8765; https://doi.org/10.3390/app14198765 - 28 Sep 2024
Viewed by 954
Abstract
Intumescent fireproof coatings protect steel structures and cables by forming a thick, fire-resistant layer under high temperatures. These coatings can deteriorate over time, impacting their fire resistance. Current testing methods are largely lab-based, lacking in-service evaluation platforms. Laser-Induced Breakdown Spectroscopy (LIBS) is emerging [...] Read more.
Intumescent fireproof coatings protect steel structures and cables by forming a thick, fire-resistant layer under high temperatures. These coatings can deteriorate over time, impacting their fire resistance. Current testing methods are largely lab-based, lacking in-service evaluation platforms. Laser-Induced Breakdown Spectroscopy (LIBS) is emerging as a promising in situ detection technology but is influenced by low air pressure in high-altitude areas. This study investigates how air pressure affects LIBS signals in intumescent coatings on galvanized steel. Using pressures between 35 and 101 kPa, a linear model was developed to correlate laser pulses to ablation depth for characterizing coating thickness. Results show that spectral intensity decreases with lower air pressure. However, a strong linear relationship persists between laser pulses and ablation depth, with a fitting accuracy above 0.9. The coating thickness is identified by the number of laser pulses required to detect the Zn spectral line from the underlying galvanized steel. As air pressure decreases, the ablation depth increases. The study effectively models and corrects for air pressure effects on LIBS data, enabling its application for field detection of fireproof coatings. This advancement enhances the reliability of LIBS technology in assessing the fire performance of these materials, providing a reference for their in situ evaluation and ensuring better fire safety standards for building steel structures and cables. Full article
(This article belongs to the Special Issue Development and Application of Laser-Induced Breakdown Spectroscopy)
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