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Cedeño E, Zuleta R, Mejorada Sánchez JL, Alvarado S, Marín E. A Differential Thermal Lens Spectrometry Method for Trace Detection. APPLIED SPECTROSCOPY 2024; 78:644-649. [PMID: 38378011 DOI: 10.1177/00037028241231828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Thermal lens spectroscopy (TLS) is a high-sensitivity method to determine the concentration of light-absorbing species in samples. Here, we implemented a transient configuration of the technique, with a focused pump and a collimated probe beam coaxially propagating. A Fabry-Perot optical resonator is incorporated allowing multi-passing of the probe beam through the sample to enhance sensitivity. We show how the low detection limit of the method can be reduced approximately by half by making differential measurements of the signal at a far field in the center point of the probe beam spot and that obtained by spatial filtering of the same beam, the so-called eclipsed signal. Measurements were performed in test samples of Deyman's organic dye, Strawberry 2143 v.7, dissolved in ethanol. The thermal lens signal measured as a function of the dye concentration in water at the center of the beam was compared with the differential signal resulting from this and the eclipsed beam.
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Affiliation(s)
- Enrique Cedeño
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA) Unidad Legaria, Ciudad de México, Mexico
| | - Rodrigo Zuleta
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA) Unidad Legaria, Ciudad de México, Mexico
| | - Jorge L Mejorada Sánchez
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA) Unidad Legaria, Ciudad de México, Mexico
| | - Salvador Alvarado
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA) Unidad Legaria, Ciudad de México, Mexico
| | - Ernesto Marín
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA) Unidad Legaria, Ciudad de México, Mexico
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Boudebs G, Zinoune JB, Cassagne C, Chis M. Thermal lens Z-scan measurements: theoretical and experimental uncertainties for low and high fluorescence quantum yields. APPLIED OPTICS 2023; 62:7669-7677. [PMID: 37855474 DOI: 10.1364/ao.500526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/15/2023] [Indexed: 10/20/2023]
Abstract
The single-beam Z-scan thermal lens technique is conducted to evaluate the fluorescence quantum yield of various solutions in the case of high-moderate absorption, considering both scenarios: solutions with substantial fluorescence and solutions with high thermal efficiency but low fluorescence. An analytical calculation is performed to determine the uncertainties associated with the random errors introduced by optical detectors. The results reveal that solutions with low fluorescence lead to a significant error, whereas higher fluorescence can help in decreasing the uncertainty. Additionally, the issue of random errors arising when multiple measurements are needed to accurately estimate the fluorescence of a solution will be discussed in different situations.
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Franko M, Goljat L, Liu M, Budasheva H, Žorž Furlan M, Korte D. Recent Progress and Applications of Thermal Lens Spectrometry and Photothermal Beam Deflection Techniques in Environmental Sensing. SENSORS (BASEL, SWITZERLAND) 2023; 23:472. [PMID: 36617073 PMCID: PMC9824884 DOI: 10.3390/s23010472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
This paper presents recent development and applications of thermal lens microscopy (TLM) and beam deflection spectrometry (BDS) for the analysis of water samples and sea ice. Coupling of TLM detection to a microfluidic system for flow injection analysis (μFIA) enables the detection of microcystin-LR in waters with a four samples/min throughput (in triplicate injections) and provides an LOD of 0.08 µg/L which is 12-times lower than the MCL for microcystin-LR in water. μFIA-TLM was also applied for the determination of total Fe and Fe(II) in 3 µL samples of synthetic cloudwater. The LODs were found to be 100 nM for Fe(II) and 70 nM for total Fe. The application of µFIA-TLM for the determination of ammonium in water resulted in an LOD of 2.3 µM for injection of a 5 µL sample and TLM detection in a 100 µm deep microfluidic channel. For the determination of iron species in sea ice, the BDS was coupled to a diffusive gradient in the thin film technique (DGT). The 2D distribution of Fe(II) and total Fe on DGT gels provided by the BDS (LOD of 50 nM) reflected the distribution of Fe species in sea ice put in contact with DGT gels.
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Affiliation(s)
- Mladen Franko
- Correspondence: (M.F.); (D.K.); Tel.: +386-5-331-53-29 (M.F.)
| | | | | | | | | | - Dorota Korte
- Correspondence: (M.F.); (D.K.); Tel.: +386-5-331-53-29 (M.F.)
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Abbasgholi N Asbaghi B, Alsadig A, Cabrera H. Online electrophoretic nanoanalysis using miniaturized gel electrophoresis and thermal lens microscopy detection. J Chromatogr A 2021; 1657:462596. [PMID: 34689905 DOI: 10.1016/j.chroma.2021.462596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 09/13/2021] [Accepted: 09/28/2021] [Indexed: 10/20/2022]
Abstract
Online thermal lens microscopy (TLM) coupled with gel electrophoresis (GE) can represent a powerful tool for separating and detecting a wide range of biomaterials. Unlike slab gel electrophoresis (SGE), the proposed method does not require prolonged procedure between separation and detection. In this work, we developed an online monitoring GE system to separate and detect nanosized materials. The design is based on a homemade and cost-effective miniaturized GE chip (MGEC) integrated with real-time TLM detection through microcontroller-based digitization board platform. To validate the feasibility and practicability of the proposed approach, we evaluated its separation capability via employing synthesized Fe3O4-Au core-shell nanoparticles (NPs) which served remarkably for the proof-of-concept. The optimum conditions for the separation process were achieved through optimization of the excitation power as 30 mW, detection position at 24 mm, the concentration of agarose gel 0.5 % w/v, and 37.5 V/cm as the effective electric field strength. The findings showed that two populations of Fe3O4-Au, core-shell, and uncapped Fe3O4 NPs, were effectively separated in less than eleven minutes, demonstrating rapid assessment of the nanomaterial production quality. Moreover, other characterization techniques such as HRTEM and EDX were employed to confirm the presence of the two dissimilar kinds of NPs separated using MGEC-TLM. The sensitivity of the method was demonstrated by determining the limit of detection (23 pM) for 10 nm AuNPs. It is envisaged that our presented system enables rapid, economical, low volume of reagents consumption and high potential analysis for quality test in various bioanalytical and nanotechnological applications.
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Affiliation(s)
| | - Ahmed Alsadig
- PhD School in Nanotechnology, University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy; NanoInnovation Lab, Elettra-Sincrotrone Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Humberto Cabrera
- Optics Lab, STI Unit, The Abdus Salam International Centre for Theoretical Physics, Trieste 34151, Italy.
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Ebrahimpour Z, Pliekhova O, Cabrera H, Abdelhamid M, Korte D, Segbéya Gadedjisso-Tossou K, Niemela J, Lavrencic Stangar U, Franko M. Photodegradation mechanisms of reactive blue 19 dye under UV and simulated solar light irradiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 252:119481. [PMID: 33524821 DOI: 10.1016/j.saa.2021.119481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 01/01/2021] [Accepted: 01/09/2021] [Indexed: 06/12/2023]
Abstract
In this work we performed dye photodegradation experiments in presence of TiO2 and Cu/Zr modified TiO2. The changes in the shape of the spectra of RB19 caused by photocatalysts under the simulated solar or UV light were monitored. Since the predominant photocatalytic mechanism can only be observed in very dilute solution of RB19, UV-Vis absorption spectrometry for higher concentrations and thermal lens spectrometry for lower concentrations have been applied to elucidate the mechanistic details of degradation processes. Bleaching of the dye was a characteristic feature, that occurred under both simulated solar and UV lights. It was also evident, that the absorption peak with maximum centered at 592 nm undergoes a slight blue shift during irradiation. The experiments carried out using UV and simulated solar light demonstrated, that two different processes responsible for the RB19 dye degradation occurred. In the initial stage of irradiation one of the processes appears under the UV light and can be recognized by a characteristic blue shift in the absorption spectrum of the solution. The second process is characteristic for irradiation by the simulated solar light which involve a blue shift at longer periods (100 min). These phenomena were attributed to the photocatalytic and photosensitization mechanisms, respectively. However, photocatalytic mechanism was also observed under simulated solar radiation, when the initial dye concentration was decreased to 5 mgL-1, and was recognized by the increase of the thermal lens signal during the initial stages of degradation process. This was possible because the thermal lens spectroscopy technique provides a limit of quantification for RB19 at the concentration level of 0.12 mg L-1, while UV-Vis spectrometry enables quantification of RB19 only down to 4 mg L-1 levels.
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Affiliation(s)
- Zeinab Ebrahimpour
- Optics Lab., The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste, Italy
| | - Olena Pliekhova
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, Vipavska 13, Nova Gorica 5000, Slovenia
| | - Humberto Cabrera
- Optics Lab., The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste, Italy.
| | - Mahmoud Abdelhamid
- Optics Lab., The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste, Italy; National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, Egypt
| | - Dorota Korte
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, Vipavska 13, Nova Gorica 5000, Slovenia.
| | - Komlan Segbéya Gadedjisso-Tossou
- Optics Lab., The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste, Italy; Laboratoire de Physique des Matériaux et Composants à Semi-conducteurs (LPMCS), Département de Physique, Université de Lomé, Togo
| | - Joseph Niemela
- Optics Lab., The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste, Italy
| | - Urska Lavrencic Stangar
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, Vipavska 13, Nova Gorica 5000, Slovenia; Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, 1000 Ljubljana, Slovenia
| | - Mladen Franko
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, Vipavska 13, Nova Gorica 5000, Slovenia
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Identification of overtone and combination bands of organic solvents by thermal lens spectroscopy with tunable Ti:sapphire laser excitation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Topić Božič J, Butinar L, Ćurko N, Kovačević Ganić K, Mozetič Vodopivec B, Korte D, Franko M. Implementation of high performance liquid chromatography coupled to thermal lens spectrometry (HPLC-TLS) for quantification of pyranoanthocyanins during fermentation of Pinot Noir grapes. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-3005-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Abbasgholi Nejad Asbaghi B, Shokoufi N, Nouri Hajibaba S. Bovine serum albumin determination based on methylene blue detection by photothermal lens spectroscopy. Anal Biochem 2020; 594:113621. [PMID: 32057729 DOI: 10.1016/j.ab.2020.113621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/06/2020] [Accepted: 02/10/2020] [Indexed: 11/24/2022]
Abstract
We report on a new sensitive method, for bovine serum albumin quantification, which is based on the use of methylene blue as a labelling agent combined with photothermal lens detection. In the presence of sodium dodecyl sulfate, methylene blue forms a dimer which can react with bovine serum albumin producing dedimerization. We found that, the photothermal signal decreases proportional to the concentration of bovine serum albumin added to the system composed by dodecyl sulfate and methylene blue. Therefore, the change of the signal intensity is linearly proportional to the concentration of bovine serum albumin. Under the optimized analytical conditions, used in this work, the photothermal signal is linearly dependent on the concentration of bovine serum albumin in the range of 0.5 × 10-6-7.5 × 10-5 gmL-1 with a regression coefficient R2 = 0.9954. The relative standard deviation for BSA determination at 3.5 × 10-5 gmL-1 (n = 5) is 2.3% and the achieved detection limit is 3.5 × 10-7 gmL-1.
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Affiliation(s)
| | - Nader Shokoufi
- Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran.
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Cabrera H, Goljat L, Korte D, Marín E, Franko M. A multi-thermal-lens approach to evaluation of multi-pass probe beam configuration in thermal lens spectrometry. Anal Chim Acta 2020; 1100:182-190. [PMID: 31987139 DOI: 10.1016/j.aca.2019.12.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 11/24/2022]
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A Review of Photothermal Detection Techniques for Gas Sensing Applications. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9142826] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Photothermal spectroscopy (PTS) is a technique used for determining the composition of liquids, solids and gases. In PTS, the sample is illuminated with a radiation source, and the thermal response of the analyte (e.g., refractive index) is analyzed to gain information about its content. Recent advances in this unique method of detecting gaseous samples show that photothermal gas spectroscopy can be an interesting alternative to commonly used absorption techniques. Moreover, if designed properly, sensors using PTS detection technique can not only reach sensitivities comparable with other, more complex techniques, but can significantly simplify the design of the sensor. In this review, recent developments in photothermal spectroscopy of gases will be summarized and discussed.
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Shokoufi N, Abbasgholi Nejad Asbaghi B, Nouri Hajibaba S. Sensitive determination of DNA based on phosphate-dye interaction using photothermal lens technique. APPLIED OPTICS 2019; 58:3074-3082. [PMID: 31044780 DOI: 10.1364/ao.58.003074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
Photothermal lens spectrometry is a powerful optical detection technique that can be used to investigate biomolecules. In this work, for the first time to our knowledge, photothermal lens spectrometry was used for determination of nanomolar concentrations of three distinct deoxyribonucleic acid (DNA) strands using methylene blue as a labeling dye. Methylene blue interacts with phosphate groups of the DNA in lower DNA concentrations. It was observed that phosphate-methylene blue interaction had no obvious effect on methylene blue absorption and fluorescence spectra, but the photothermal lens spectrometry signal of methylene blue increased with DNA concentration. For this purpose, to evaluate the performance of the presented method, herring sperm DNA, Escherichia coli bacteria DNA, and partial 16S rRNA genes were examined. Under optimum conditions, photothermal lens spectrometry intensity of methylene blue increased linearly with DNA concentration when herring sperm DNA, Escherichia coli DNA, and 16S rRNA gene concentrations increased in the ranges of 0.1-250, 1-700, and 1-800 nmol L-1, respectively. The corresponding detection limits were found to be 0.07, 0.71, and 0.56 nmol L-1, respectively, and relative standard deviations for 50 nmol L-1 of the tested samples were 2.59%, 4.95%, and 4.57%, respectively.
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Seto K, Yamada H, Kobayashi T, Tokunaga E. Demonstration of wavelength-scan-free action spectroscopy in pump/probe measurement with supercontinuum pump light. OPTICS EXPRESS 2019; 27:6976-6995. [PMID: 30876272 DOI: 10.1364/oe.27.006976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/10/2019] [Indexed: 06/09/2023]
Abstract
We devise and introduce the principle of wavelength-scan-free spectroscopy for the pump light in pump/probe measurement (action spectroscopy) using supercontinuum light; we demonstrate its implementation by measuring transmission spectra. We use the supercontinuum light noise as a code in order to discriminate wavelength. We extract the stimulation at the desired wavelength by correlating the noise at that wavelength observed separately and the observed total stimulation carried by the probe light. The wavelength-scan-free spectroscopy is enabled with a simultaneous procedure for multiple wavelengths.
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