| Title: | Photothermal lens technique: a comparison between conventional and self-mixing schemes |
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| Authors: | ID Cabrera, Humberto, Istituto Nazionale di Fisica Nucleare; The Abdus Salam International Centre for Theoretical Physics; (Author)
ID Ashraf, Imrana, Quaid-I-Azam University (Author)
ID Matroodi, Fatima, Shahid Chamran University of Ahvaz (Author)
ID Ramírez-Miquet, Evelio E., Université Paris Diderot (Author)
ID Akbar, Jehan, Hazara University (Author)
ID Suárez-Vargas, Jose Juan, IOM-CNR; Venezuelan Institute for Scientific Research (Author)
ID Barrera Ramírez, John Fredy, Universidad de Antioquia UdeA (Author)
ID Korte, Dorota, University of Nova Gorica (Author)
ID Budasheva, Hanna, University of Nova Gorica (Author)
ID Niemela, Joseph J., The Abdus Salam International Centre for Theoretical Physics (Author), et al. |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | This work focuses on assessing the analytical capabilities of a new photothermal lens method based on the self-mixing effect to reliably measure metallic traces in water-ethanol solutions. We compare it with the conventional thermal lens scheme, considering the low detection limit and versatility. A theoretical model is presented to describe the laser power variations as a function of the photothermal parameters of the analyzed sample. The experimental results demonstrate that the laser intensity variations, induced by the external optical feedback, are governed by
the photothermal lens effect. Measurements of Fe(II)-1,10-phenanthroline in water–ethanol solutions show a favourable correspondence and agreement with the theory. The low detection limits obtained by the two analytic techniques also agree very well. Nevertheless, our instrument presents advantages regarding compactness and simplicity, suggesting that this platform could be potentially useful as a robust analytical tool for metallic trace detection. In addition, calibration of the method is performed by measuring the so-called self-mixing constant. |
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| Keywords: | thermal lens, photothermal spectroscopy, self-mixing effect, trace detection |
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| Publication version: | Version of Record |
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| Year of publishing: | 2019 |
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| Number of pages: | 055703-055703 |
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| Numbering: | 29, 5 |
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| PID: | 20.500.12556/RUNG-4454-b954132c-afa1-54b4-3a9f-7e6f75869104 |
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| COBISS.SI-ID: | 5366267 |
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| DOI: | 10.1088/1555-6611/ab0a66 |
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| NUK URN: | URN:SI:UNG:REP:RCOMYWXH |
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| Publication date in RUNG: | 05.04.2019 |
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| Views: | 4460 |
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| Downloads: | 0 |
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