Journal of Applied Spectroscopy最新文献_第3页

Determination of Temperature and Thermal Resistance of High-Power AlInGaN Laser Diodes by a Forward Voltage Relaxation Method

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01886-1

A. V. Aladov, A. L. Zakgeim, A. E. Ivanov, A. E. Chernyakov

引用次数: 0

MAX-Phase Structure Formation in Ti–Al–N Coating and Bulk Material During High-Temperature Annealing in Vacuum

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01879-0

E. A. Ovodok, M. I. Ivanovskaya, A. E. Seleznev, S. V. Zlotsky, V. V. Uglov, E. Sotova

{"title":"MAX-Phase Structure Formation in Ti–Al–N Coating and Bulk Material During High-Temperature Annealing in Vacuum","authors":"E. A. Ovodok, M. I. Ivanovskaya, A. E. Seleznev, S. V. Zlotsky, V. V. Uglov, E. Sotova","doi":"10.1007/s10812-025-01879-0","DOIUrl":"10.1007/s10812-025-01879-0","url":null,"abstract":"The structure and phase state of Ti–Al–N systems obtained in the form of a coating and a bulk material were comparatively studied. The structure was characterized using x-ray diffraction, energy-dispersive spectroscopy (EDS), and Raman spectroscopy (RS). The use of EDS and RS made it possible to verify the x-ray diffraction data on the phase composition of the samples, which is especially important in the study of multiphase Ti–Al–N coatings, and to identify the features of the coating surface microstructure. The Ti–Al–N coating was obtained by chemical deposition of Ti and Al in an N2 atmosphere on a Ti substrate with subsequent annealing in vacuum at 700, 800, 900, and 1000°C. The bulk Ti–Al–N sample was obtained by reaction sintering of Ti, Al, and TiN powders in vacuum at 1200 and 1300°C. The Ti2AlN MAX phase appeared in the coating at a lower temperature than in the bulk sample and was characterized by lower thermal stability. The Ti–Al–N coating was characterized by a greater multiphase nature. The phases Ti2AlN, Ti4AlN3, TiN, Ti2N, and AlN were detected in it after annealing in vacuum at 900°C. The MAX-phase structure was destroyed at 1000°C. The main phase in the bulk sample after annealing in vacuum at 1300°C was Ti2AlN with a small admixture of TiN and TiAl. The Ti2AlN MAX phase was destroyed at 1400°C.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"63 - 70"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667947","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

Signal Enhancement and Reproducibility Improvement in Double-Pulse Femtosecond-Laser-Induced Breakdown Spectroscopy

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01887-0

Y. Zhu, P. Zhou, S. Li

引用次数: 0

Technological Features of Quartz from Muscovite Pegmatite Mining Wastes of North Karelia (Russia)

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01876-3

E. N. Svetova, T. P. Bubnova, V. B. Pikulev, S. V. Loginova

{"title":"Technological Features of Quartz from Muscovite Pegmatite Mining Wastes of North Karelia (Russia)","authors":"E. N. Svetova, T. P. Bubnova, V. B. Pikulev, S. V. Loginova","doi":"10.1007/s10812-025-01876-3","DOIUrl":"10.1007/s10812-025-01876-3","url":null,"abstract":"Quartz from pegmatite mining wastes in North Karelia (Russia) were studied using atomic emission spectroscopy with inductively coupled plasma, IR spectroscopy, and optical and scanning electron microscopy to reveal the main technological characteristics of quartz that determine the possibility of utilizing it as a promising raw material for high-purity quartz concentrate production. It was shown that mineral inclusions in quartz were mainly represented by feldspars, muscovite, calcite, iron oxides, and borosilicate, which was confirmed by the trace element composition of quartz dominated by Al, Ca, K, and Na. Quartz contains OH-complexes associated with structural impurities of Al, Li and B along with molecular water, which was a part of gas–liquid inclusions. A quartz concentrate with a total impurity content of 160 ppm was obtained by unsorted quartz processing that included electromagnetic separation, microwave exposure, and acid pickling. Production of high-purity quartz concentrate with a total impurity content of <50 ppm in quartz grit with a fineness of 0.5–0.1 mm turned out to be difficult because of micron-sized mineral inclusions, gas–liquid inclusions, and structural impurities that were hard to remove during enrichment.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"45 - 52"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667888","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

Preparation of Nitrogen-Doped Carbon Quantum Dots and their Application in Detecting Heavy Metal Ions in Polymetallic Deposits 掺氮碳量子点的制备及其在多金属矿床重金属离子检测中的应用

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01891-4

H. Wu, L. Meng

{"title":"Preparation of Nitrogen-Doped Carbon Quantum Dots and their Application in Detecting Heavy Metal Ions in Polymetallic Deposits","authors":"H. Wu, L. Meng","doi":"10.1007/s10812-025-01891-4","DOIUrl":"10.1007/s10812-025-01891-4","url":null,"abstract":"Nitrogen-doped carbon quantum dots (N-CQDs) were prepared by a one-step hydrothermal method using urea, aniline, and ethylenediamine as raw materials and nitrogen sources which exhibited good fluorescence performance. Spectral characteristics of the samples were analyzed using UV spectrophotometry, fluorescence spectrophotometry, and Fourier transform infrared spectroscopy. Optimal conditions, such as pH, reaction time, and ion concentration were investigated for N-CQDs. Under the optimal conditions (40 μL N-CQDs, buffer solution at pH 6 with a reaction time of 30 min), it was observed that cobalt ions caused a significant fluorescence quenching effect on the prepared N-CQDs, as determined by fluorescence spectrophotometry. The spiked recovery rates ranged from 95.8 to 104.6%, indicating that the N-CQDs could serve as a fluorescent probe for detecting the content of Co(II) in the actual environment. This method could be applied to the monitoring of heavy metal pollution in mine groundwater, the detection results of Co(II) using this method were very similar to ICP-MS, indicating that this method had good application prospects.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"151 - 158"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667844","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

Minimization of Mixing Time in Rudner–Levitov Chains by Optimizing the Initial State

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-03-10 DOI: 10.1007/s10812-025-01884-3

M. A. Antsukh, P. A. Leonik, I. A. Peshko

引用次数: 0

Use of Atr-Ir Spectroscopy to Assess the Effect of Surfactants on Phase Separation in Polyurethane–Urea Films

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-02-27 DOI: 10.1007/s10812-025-01873-6

A. V. Savchuk, V. Yu. Senichev

引用次数: 0

Optical Absorption Spectra of (E)-2-(2-Aryl-1-Cyanovinyl)-4-Cyclopropylthiazoles

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-02-26 DOI: 10.1007/s10812-025-01872-7

A. A. Tikhii, I. V. Zhikharev, V. D. Dyachenko

引用次数: 0

Electron-Stimulated Sonochemiluminescence of Ce3+ Ions in Liquid Ammonia

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-02-26 DOI: 10.1007/s10812-025-01874-5

B. M. Gareev, A. M. Abdrakhmanov, L. R. Yakshembetova, G. L. Sharipov

{"title":"Electron-Stimulated Sonochemiluminescence of Ce3+ Ions in Liquid Ammonia","authors":"B. M. Gareev, A. M. Abdrakhmanov, L. R. Yakshembetova, G. L. Sharipov","doi":"10.1007/s10812-025-01874-5","DOIUrl":"10.1007/s10812-025-01874-5","url":null,"abstract":"This is the first study of the light emission during the sonolysis of liquid ammonia and of solutions of cerium and silver salts in this solvent at –70°C. A Ce3+ luminescence band with a maximum at 400 nm in the moving singlebubble sonoluminescence spectrum generated by ultrasound in a solution of 5·10–4 M Ce(SO4)2 in ammonia was discovered. This band was found in addition to the bubble luminescence continuum usual for liquids (240–800 nm in ammonia). The quenching of this band in the presence of AgNO3 in ammonia solution indicates that electron acceptor Ag+ ions suppress the probable sonochemiluminescence reaction Ce4+ + ({e}_{s}^{-}) → η(Ce3+)* + (1 − η) Ce3+, (Ce3+)* → Ce3+ + hν responsible for the detected Ce3+ glow. The concentration of Ce4+ in the solution is diminished when it is reduced in this reaction and the sonoluminescence intensity of the Ce3+ band also decreases during the sonolysis but then reaches a constant level a few minutes after its onset. This behavior is attributed to the attainment of a dynamic equilibrium between the rates of cerium ion reduction and oxidation: Ce4+ → Ce3+ and Ce3+ → Ce4+, respectively. The one-electron oxidizing agent in the latter reaction is presumably the NH2 radical, which is another primary product of ammonia sonolysis, in addition to a solvated electron (({e}_{s}^{-})). The formation of Ce3+ cations during the sonolysis of a Ce(SO4)2 solution was confirmed by the detection of Ce3+ photoluminescence. The excitation yield in the sonochemiluminescence reaction η = 2·10–6.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"33 - 37"},"PeriodicalIF":0.8,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668323","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

Fluorescence Analysis of Meta-Tetra(Hydroxyphenyl)Chlorine Complexation with Monomeric and Polymeric Cyclodextrins

IF 0.8 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-02-26 DOI: 10.1007/s10812-025-01871-8

I. V. Koblov, I. E. Kravchenko, T. E. Zorina, V. Kaskeh, V. P. Zorin

{"title":"Fluorescence Analysis of Meta-Tetra(Hydroxyphenyl)Chlorine Complexation with Monomeric and Polymeric Cyclodextrins","authors":"I. V. Koblov, I. E. Kravchenko, T. E. Zorina, V. Kaskeh, V. P. Zorin","doi":"10.1007/s10812-025-01871-8","DOIUrl":"10.1007/s10812-025-01871-8","url":null,"abstract":"Spectral methods have been developed for analyzing the equilibrium and kinetics of the complexation process of the known photosensitizer, meta-tetrakis(hydroxyphenyl)chlorine (mTHPC), with monomeric and polymeric derivatives of β-cyclodextrin (β-CD). The study of the binding isotherms showed that mTHPC has a higher affinity for the polymeric derivatives of β-CD studied, namely, carboxymethyl-β-cyclodextrin polymer (CM-β-CDPD) and β-cyclodextrin polymer (β-CDPD), than for monomeric methyl-β-cyclodextrin (M-β-CDMD). Profiles for the change in the relative content of mTHPC inclusion complexes with β-CDs in solution with and without the presence of lipid vesicles were obtained and the dissociation constants of the photosensitizer (PS) molecules were calculated from the content of the inclusion complexes with cyclodextrins. The dissociation of mTHPC from the inclusion complexes with M-β-CDMD takes 1–2 min, while this process takes more than one hour with polymeric CDs, (CM-β-CDPD and β-CDPD). These findings suggest that the complexation of the title chlorine with polymeric and monomeric cyclodextrins may play an essential role in the delivery of photosensitizer to cellular/tissue structures.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 1","pages":"8 - 15"},"PeriodicalIF":0.8,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668324","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