Time investigation and enhancement of the photothermal lens effect in the mode-matched configuration

Soyeh, Ilhem; Hannachi, Riadh; Sammouda, Habib; Béji, Lotfi

doi:10.1007/s00340-022-07894-9

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…The experimental setup used in this work is shown in Fig. 1 and is similar to that reported in earlier works [15,21]. A 12 mW solid-state laser at 375 nm was used as an excitation beam and a 2 mW He-Ne laser at 632.8 nm was used as a probe beam.…”

Section: Experimental Set-upmentioning

confidence: 97%

Investigation of the quartz cuvette surface contamination used for permanganate quantification in tap water by photothermal lens spectroscopy

Soyeh,

Hannachi,

Sammouda

2023

Preprint

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In this work, the PhotoThermal Lens (PTL) spectroscopy was used to investigate the contamination effect of the quartz cuvette on the quantification of permanganate concentration in tap water at neutral pH. Different permanganate solutions were prepared at a concentration range from 0.2 µM to 10 µM. The PTL signal measurements performed for samples having the same permanganate concentration in tap water increase continuously. Contrary to the solutions prepared in distilled water where the PTL signal remains constant for all the measurements. Thus, it results from that the main cause of this behavior is related to the decomposition reaction of permanganate in tap water giving rise to manganese dioxide, which then will be adsorbed on the optical window surfaces of the quartz cuvette. The contribution of the adsorbed amount on the PTL signal was examined and its variation was described based on Langmuir model. To remove this contamination effect caused by the adsorption process, three 0.1 M acidic solutions (HCl, H2SO4 and H3PO4) were applied separately for the cleaning of the optical window surfaces. The obtained results show that 4 min is sufficient to reach a desorption rate higher than 90% whatever the used acid.

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Section: Experimental Set-upmentioning

confidence: 97%

Investigation of the quartz cuvette surface contamination used for permanganate quantification in tap water by photothermal lens spectroscopy

Soyeh,

Hannachi,

Sammouda

2023

Preprint

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“…The decay signal is a treasure of information, providing insights into the thermo-optical properties of the sample, and allowing the evaluation of heat transfer rates. − Analysis of the decay characteristics helps understand heat propagation and material behavior, making the thermal lens decay signal a vital aspect of TL spectroscopy. , The single-beam TL signal seems to be more noisy than the double-beam signal. Such unwanted fluctuations superimposed over the decay signal limit the accuracy of the curve fitting based on the equation proposed by Gordon and modified by Hu and Whinnery. , This, in turn, affects the accuracy of the estimated values in applications of TLS, like the detection of trace analytes, chemical kinetics study of reactions, and the measurement of physical properties of materials like thermal diffusivity, absolute quantum yield, and absorption coefficient …”

Section: Introductionmentioning

confidence: 99%

Exploring the Enigma: Decoding the Mystery behind Noiselike Patterns in Thermal Lens Signal

M S,

2024

J. Phys. Chem. C

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For the first time, this study unveils the enigma behind the noiselike patterns superimposed over the signal of photothermal lensing spectroscopy that has emerged as a powerful tool for nondestructive evaluation. The single-beam thermal lens (TL) signal of a sample (illustrated using ethylene glycol) is recorded using an ultrasensitive photodetector and a digital storage oscilloscope. The signal exhibits fluctuations superimposed that the photothermal spectroscopic community considered as noise so far, limiting the accuracy of the technique. The comprehensive analysis carried out helps in decoding the mystery behind the superimposed fluctuations in TL signal, affirming the nonwhite noise (WN) nature of the signal and emphasizing that they carry valuable information. These findings not only challenge preconceived assumptions but also unveil novel pathways, offering new perspectives that enhance our understanding of the dynamics within the medium in the realm of TL spectroscopy and are deciphered with literature support.

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Investigation of the quartz cuvette surface contamination used for permanganate quantification in tap water by photothermal lens spectrometry

Soyeh,

Hannachi,

Sammouda

2023

Appl. Phys. B

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Time investigation and enhancement of the photothermal lens effect in the mode-matched configuration

Cited by 4 publications

References 31 publications

Investigation of the quartz cuvette surface contamination used for permanganate quantification in tap water by photothermal lens spectroscopy

Investigation of the quartz cuvette surface contamination used for permanganate quantification in tap water by photothermal lens spectroscopy

Exploring the Enigma: Decoding the Mystery behind Noiselike Patterns in Thermal Lens Signal

Investigation of the quartz cuvette surface contamination used for permanganate quantification in tap water by photothermal lens spectrometry

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