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Structural and Optical Properties of Carbon–Palladium Nanocomposite Films Synthesized by Ion Sputtering
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01880-7
N. M. Suleimanov, V. V. Bazarov, N. M. Lyadov, I. A. Faizrakhmanov, V. A. Shustov
{"title":"Structural and Optical Properties of Carbon–Palladium Nanocomposite Films Synthesized by Ion Sputtering","authors":"N. M. Suleimanov,&nbsp;V. V. Bazarov,&nbsp;N. M. Lyadov,&nbsp;I. A. Faizrakhmanov,&nbsp;V. A. Shustov","doi":"10.1007/s10812-025-01880-7","DOIUrl":"10.1007/s10812-025-01880-7","url":null,"abstract":"<p>Carbon–palladium nanocomposite films of thickness ~140 nm with a palladium nanoparticle size up to 2 nm were synthesized by ion sputtering of composite targets. The optical properties of carbon–palladium composite films were studied in the visible spectrum region. The optical absorption of these nanocomposite films was described by the characteristic Tauc dependence. In this case, the presence of palladium nanoparticles leads to a sharp decrease in the optical gap in composite films, which is explained by an increase in the average size of graphene nanoclusters in the carbon matrix.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"71 - 75"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectroscopic Measurements of Ammonia Total Column at the Atmospheric Monitoring Station of St. Petersburg State University
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01883-4
M. V. Makarova, D. V. Ionov, A. V. Poberovskii, S. Ch. Foka, E. F. Mikhailov
{"title":"Spectroscopic Measurements of Ammonia Total Column at the Atmospheric Monitoring Station of St. Petersburg State University","authors":"M. V. Makarova,&nbsp;D. V. Ionov,&nbsp;A. V. Poberovskii,&nbsp;S. Ch. Foka,&nbsp;E. F. Mikhailov","doi":"10.1007/s10812-025-01883-4","DOIUrl":"10.1007/s10812-025-01883-4","url":null,"abstract":"<p>The possibility of long-term monitoring of the NH<sub>3</sub> total column in the atmosphere from results of ground-based measurements of direct solar radiation in the mid-IR range was demonstrated based on an analysis of high-resolution FTIR-spectra recorded at the St. Petersburg State University atmospheric monitoring station in 2009–2022. Random and systematic uncertainties of the NH<sub>3</sub> total column were estimated. Results of 14-year FTIR monitoring of NH<sub>3</sub> in the atmosphere are presented and compared with data from independent satellite and ground-based measurements.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"92 - 99"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Libs Feature Variable Extraction Method Based on Convolutional Neural Network
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01900-6
X. Lin, S. Gao, Y. Du, Y. Yang, C. Che
{"title":"Libs Feature Variable Extraction Method Based on Convolutional Neural Network","authors":"X. Lin,&nbsp;S. Gao,&nbsp;Y. Du,&nbsp;Y. Yang,&nbsp;C. Che","doi":"10.1007/s10812-025-01900-6","DOIUrl":"10.1007/s10812-025-01900-6","url":null,"abstract":"<p>The extraction of feature variables can significantly reduce the dimension, simplify the features, and improve the accuracy of quantitative models, which is of great significance in spectral data preprocessing using laser-induced breakdown spectroscopy (LIBS). A feature variable extraction method based on convolutional neural network was proposed. The LIBS spectral data was subjected to multilayer two-dimensional convolution through the series connection of the convolution structure and an InceptionV2 module, and the multi-level features were gradually extracted to find the optimal feature variable combination. Finally, the prediction results were obtained by the fully connected layer. In order to verify the applicability of the extracted features, the extraction results of the convolutional neural network were directly input into random forest to construct a quantitative model. In this paper, the concentration of K element in the mixed solution prepared by the laboratory was tested. The determination coefficients R<sup>2</sup> of the CNN–RF training set and the test set reached 0.993 and 0.990, respectively. The root mean square error (RMSEC) of the training set and the root mean square error (RMSEP) of the test set were 0.0067 and 0.0084 wt.%, respectively, and the average relative error reached 8.533%. The evaluation parameters were significantly better than the extraction results of least absolute shrinkage and selection operator, principal component analysis and SelectKBest. The results show that the convolutional neural network can effectively extract LIBS characteristic spectral lines and improve the accuracy of quantitative analysis.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"218 - 224"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Photoionization of Rydberg States of K III Ions
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01888-z
I. Sakho, M. T. Gning, A. Diallo
{"title":"Photoionization of Rydberg States of K III Ions","authors":"I. Sakho,&nbsp;M. T. Gning,&nbsp;A. Diallo","doi":"10.1007/s10812-025-01888-z","DOIUrl":"10.1007/s10812-025-01888-z","url":null,"abstract":"<p>Accurate resonance energies and quantum defects for various Rydberg series originating from the 3s<sup>2</sup>3p<sup>5</sup> (<sup>2</sup>P°<sub>3/2</sub>) ground and 3s<sup>2</sup>3p<sup>5</sup> (<sup>2</sup>P°<sub>3/2</sub>) metastable states of K III ions are reported up to n = 30. Theoretical photoionization is performed in the framework of the screening constant per unit nuclear charge (SCUNC) method. The SCUNC predictions, believed to be the first calculations, agree very well with the only available advanced light source (ALS) measurements. Some of the overlap peaks in the ALS measurements are clearly identified via the present SCUNC calculations. The present work demonstrates the strength of the SCUNC formalism to assist experimenters in the analysis of measurements from synchrotron radiation. New data are tabulated for n = 15–30.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"123 - 140"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dispersion of Acoustic Waves in Anodic Aluminum Oxide Phononic Crystals
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01875-4
S. D. Abdurakhmonov, M. S. Ashurov
{"title":"Dispersion of Acoustic Waves in Anodic Aluminum Oxide Phononic Crystals","authors":"S. D. Abdurakhmonov,&nbsp;M. S. Ashurov","doi":"10.1007/s10812-025-01875-4","DOIUrl":"10.1007/s10812-025-01875-4","url":null,"abstract":"<p>Phononic band gaps of one-dimensional phononic crystals based on porous anodic aluminum oxide were numerically simulated. The spectral position of phononic band gaps of anodic aluminum oxide impregnated with various liquids was determined. Air- and liquid-filled nanopores displayed markedly different phonon dispersion relations. The dispersion characteristics of the studied samples were calculated. The group velocity of phonons and their effective mass were determined.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"38 - 44"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Light Absorption by a Medium Containing a Multilayered System of Monolayers of Spherical Particles
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01882-5
A. A. Miskevich, V. A. Loiko, N. A. Loiko, W. Yang, L. Zhang
{"title":"Light Absorption by a Medium Containing a Multilayered System of Monolayers of Spherical Particles","authors":"A. A. Miskevich,&nbsp;V. A. Loiko,&nbsp;N. A. Loiko,&nbsp;W. Yang,&nbsp;L. Zhang","doi":"10.1007/s10812-025-01882-5","DOIUrl":"10.1007/s10812-025-01882-5","url":null,"abstract":"<p>An approach was developed to describe the optical properties of multilayered systems (multilayers) consisting of monolayers of spherical particles in a light-absorbing medium. It takes into account multiple scattering of waves in individual monolayers and multiple reflections between monolayers. The transmission and reflection amplitude coefficients of the selected layers of light-absorbing medium containing monolayers of particles were determined in the framework of a recently developed method based on utilizing the quasicrystalline approximation. They were used to calculate transmission and reflection coefficients of a multilayer in the framework of the transfer matrix method. The calculated absorption coefficients of a weakly absorbing medium layer containing 1, 4, 8, and 32 monolayers of titanium oxide (TiO<sub>2</sub>) particles with an incident plane electromagnetic wave along the normal as applied to the enhancement of photocatalytic reactions in photochemical microreactors were presented.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"83 - 91"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two-State Lasing in Quantum Well and Quantum Well-Dot Lasers
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01881-6
A. A. Beckman, G. O. Kornyshov, Yu. M. Shernyakov, N. Yu. Gordeev, A. S. Payusov, S. A. Mintairov, N. A. Kalyuzhnyy, O. I. Simchuk, A. A. Kharchenko, M. V. Maximov
{"title":"Two-State Lasing in Quantum Well and Quantum Well-Dot Lasers","authors":"A. A. Beckman,&nbsp;G. O. Kornyshov,&nbsp;Yu. M. Shernyakov,&nbsp;N. Yu. Gordeev,&nbsp;A. S. Payusov,&nbsp;S. A. Mintairov,&nbsp;N. A. Kalyuzhnyy,&nbsp;O. I. Simchuk,&nbsp;A. A. Kharchenko,&nbsp;M. V. Maximov","doi":"10.1007/s10812-025-01881-6","DOIUrl":"10.1007/s10812-025-01881-6","url":null,"abstract":"<p>The switching of lasing from the ground state to the excited state with increasing current in InGaAs/GaAs lasers with quantum well-dots (QWDs) and quantum wells with different waveguide widths has been studied. It was shown that lasers with a waveguide of width 0.45 μm did not switch to the lasing mode through an excited state at current densities up to 48 kA/cm<sup>2</sup> due to peculiarities of the density of states in QWDs, in contrast to lasers with quantum wells. Generation through an excited state in QWD lasers occurred when the waveguide width increased up to 0.78 μm and was accompanied by switching from the fundamental to the second-order optical mode.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"76 - 82"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectral-Luminescence Properties of Thulium- and Holmium-Coactivated Yttrium Sesquioxide Ceramic
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01878-1
R. N. Maksimov, V. A Shitov, V. V. Osipov, E. M. Buzaeva, P. A. Ryabochkina, A. O. Ariskin
{"title":"Spectral-Luminescence Properties of Thulium- and Holmium-Coactivated Yttrium Sesquioxide Ceramic","authors":"R. N. Maksimov,&nbsp;V. A Shitov,&nbsp;V. V. Osipov,&nbsp;E. M. Buzaeva,&nbsp;P. A. Ryabochkina,&nbsp;A. O. Ariskin","doi":"10.1007/s10812-025-01878-1","DOIUrl":"10.1007/s10812-025-01878-1","url":null,"abstract":"<p>Results of investigating the spectral and luminescent characteristics of optical ceramics from thulium- and holmium- coactivated yttrium sesquioxide (Tm,Ho:Y<sub>2</sub>O<sub>3</sub>) are presented. The ceramic samples were fabricated using solid-state vacuum sintering of nano-sized particles with a complex chemical composition synthesized by laser evaporation. The transmittance of Tm,Ho:Y<sub>2</sub>O<sub>3</sub> ceramics in the region of 2 μm exceeded 82%, indicative of their high optical quality. The redistribution of line intensities in the luminescence spectra of <sup>3</sup>F<sub>4</sub> → <sup>3</sup>H<sub>6</sub> transitions of Tm<sup>3+</sup> and <sup>5</sup>I<sub>7</sub> → <sup>5</sup>I<sub>8</sub> transitions of Ho<sup>3+</sup> observed upon excitation of Tm<sup>3+</sup> to the <sup>3</sup>H<sub>4</sub> level in ceramics with different Tm<sup>3+</sup>/Ho<sup>3+</sup> ratios indicated the occurrence of a nonradiative energy transfer process from the <sup>3</sup>F<sub>4</sub> level of Tm<sup>3+</sup> to the <sup>5</sup>I<sub>7</sub> level of Ho<sup>3+</sup>.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"59 - 62"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Surface Morphology and Optical and Electrophysical Properties of Piezoceramic Films Obtained by Laser Deposition in Vacuum
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01877-2
N. A. Bosak, M. V. Bushinsky, A. N. Chobot, L. Vu. Baran, V. V. Malyutina-Bronskaya, I. A. Taratyn
{"title":"Surface Morphology and Optical and Electrophysical Properties of Piezoceramic Films Obtained by Laser Deposition in Vacuum","authors":"N. A. Bosak,&nbsp;M. V. Bushinsky,&nbsp;A. N. Chobot,&nbsp;L. Vu. Baran,&nbsp;V. V. Malyutina-Bronskaya,&nbsp;I. A. Taratyn","doi":"10.1007/s10812-025-01877-2","DOIUrl":"10.1007/s10812-025-01877-2","url":null,"abstract":"<p>Nanostructured thin films on silicon and glass substrates have been obtained using high-frequency repetitively pulsed f ~ 10–12 kHz laser radiation with wavelength λ = 1.064 μm and power density q = 33 MW/cm<sup>2</sup> on a piezoceramic PZT-19 target at vacuum chamber pressure p = 2.2·10<sup>–2</sup> mm Hg. The morphology of the thin piezoceramic films was studied using atomic force microscopy. Transmission spectra of the obtained films were investigated in the visible and near- and mid-IR regions. The electrophysical characteristics of PZT-19/Si structures on Si substrate were analyzed.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"53 - 58"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of the Inverse Piezoelectric Effect and Photoelasticity on Coherent Interaction of Gaussian (1+1)D Light Beams in Bi12SiO20 Crystal
IF 0.8 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01885-2
A. A. Golub, V. N. Naunyka, V. V. Davydouskaya, Zh. V. Kolyadko, A. V. Fedorova, D. S. Blotskaya
{"title":"Influence of the Inverse Piezoelectric Effect and Photoelasticity on Coherent Interaction of Gaussian (1+1)D Light Beams in Bi12SiO20 Crystal","authors":"A. A. Golub,&nbsp;V. N. Naunyka,&nbsp;V. V. Davydouskaya,&nbsp;Zh. V. Kolyadko,&nbsp;A. V. Fedorova,&nbsp;D. S. Blotskaya","doi":"10.1007/s10812-025-01885-2","DOIUrl":"10.1007/s10812-025-01885-2","url":null,"abstract":"<p>A generalized theoretical model of the coherent interaction of linearly polarized (1+1)D light beams in a cubic optically active photorefractive Bi<sub>12</sub>SiO<sub>20</sub> crystal of cut <span>(left(overline{1 }overline{1 }0right))</span> placed in an external constant electric field including inverse piezoelectric and photoelastic effects in addition to the traditional electro-optical effect is presented. The interaction of identically linearly polarized one-dimensional light beams with a transverse Gaussian distribution of the light field at the crystal entrance has been studied. Consideration of the additional parameters and effects in the mathematical model was shown to cause significant changes in the obtained theoretical results, which allowed a more correct interpretation of the experimental data. Interaction of driven and leading Gaussian light beams with mutually orthogonal linear polarizations at the crystal entrance was numerically modeled.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"105 - 110"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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