Bulletin of the Russian Academy of Sciences: Physics最新文献_第9页

Fabrication of Copper Electrodes by Direct Laser Metallization for Flexible Electronics 柔性电子用直接激光金属化铜电极的制备

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714886

L. Logunov, E. Afanaseva, A. Pilipchuk, V. Kostyukova, D. Shestakov, E. Danilovskiy

{"title":"Fabrication of Copper Electrodes by Direct Laser Metallization for Flexible Electronics","authors":"L. Logunov, E. Afanaseva, A. Pilipchuk, V. Kostyukova, D. Shestakov, E. Danilovskiy","doi":"10.1134/S1062873825714886","DOIUrl":"10.1134/S1062873825714886","url":null,"abstract":"We presented a novel, maskless approach for fabricating copper electrodes on flexible polyimide substrates using direct laser metallization (DLM) from deep eutectic solvents (DES). The DLM process utilizes localized thermochemical reactions driven by a picosecond pulsed laser to convert DES precursors into conductive copper structures with precise patterning. Key parameters such as laser power density, scanning speed, and DES layer thickness were optimized to achieve uniform copper lines with excellent electrical conductivity and mechanical flexibility. The fabricated electrodes demonstrated remarkable stability under bending tests, showing less than 5% variation in resistance, which confirms their suitability for flexible pressure and strain sensor applications in wearable electronics and human–machine interfaces. This is the first demonstration of copper structures produced on polyimide via DES-based DLM with proven functional performance, highlighting its potential as a scalable, cost-effective method for next-generation flexible electronic device manufacturing.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"S519 - S522"},"PeriodicalIF":0.48,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of ATR-FTIR Spectroscopy for Investigation of Photoswitching of Amphiphilic Spirocompounds ATR-FTIR光谱在两亲性螺类化合物光开关研究中的应用

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714990

I. O. Kuznetsov, N. Yu. Spitsyn, A. N. Morozov, A. V. Kutasevich, V. S. Mityanov, O. A. Raitman

引用次数: 0

Scanning Near-Field Optical Microscopy Characterization of WSe2 and MoSe2 Planar Waveguides WSe2和MoSe2平面波导的扫描近场光学显微镜表征

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714916

D. I. Yakubovsky, D. V. Grudinin, N. V. Pak, V. G. Leiman, A. V. Arsenin

{"title":"Scanning Near-Field Optical Microscopy Characterization of WSe2 and MoSe2 Planar Waveguides","authors":"D. I. Yakubovsky, D. V. Grudinin, N. V. Pak, V. G. Leiman, A. V. Arsenin","doi":"10.1134/S1062873825714916","DOIUrl":"10.1134/S1062873825714916","url":null,"abstract":"The advancement of integrated nanophotonics requires the development and characterization of materials with high refractive indices and low optical losses. Van der Waals (vdW) materials, particularly transition metal dichalcogenides (TMDs) such as WSe2 and MoSe2, exhibit giant optical anisotropy and high refractive indices (n > 4) in the near-infrared range, making them promising candidates for next-generation photonic circuits. However, accurately determining their anisotropic optical constants, especially the out-of-plane component, is challenging due to the limited size of exfoliated flakes and the limitations of far-field techniques. This study details the application of scattering-type scanning near-field optical microscopy (s‑SNOM) for the nanoscale characterization of these materials. The principles of s-SNOM, including the excitation and detection of waveguide modes in planar vdW structures, are discussed. By analyzing the interference fringes generated by propagating modes, the effective mode index is determined. We demonstrate this methodology using WSe2 and MoSe2 flakes, where the experimental effective indices are compared with theoretical models. This comparison confirms the necessity of accounting for giant optical anisotropy and validates the out-of-plane dielectric constants, illustrating the efficacy of s-SNOM for the comprehensive optical characterization of vdW materials.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"S540 - S544"},"PeriodicalIF":0.48,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Confocal Laser Scanning Microscopy for Investigation of Up-to-Micrometer-Scale 3D Components Fabricated by Direct Laser Writing-Lithography Methods (Review) 激光共聚焦扫描显微镜研究直接激光刻蚀法制备微米级三维部件（综述）

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714989

R. P. Matital, D. A. Kolymagin, A. G. Vitukhnovsky

{"title":"Confocal Laser Scanning Microscopy for Investigation of Up-to-Micrometer-Scale 3D Components Fabricated by Direct Laser Writing-Lithography Methods (Review)","authors":"R. P. Matital, D. A. Kolymagin, A. G. Vitukhnovsky","doi":"10.1134/S1062873825714989","DOIUrl":"10.1134/S1062873825714989","url":null,"abstract":"Advanced characterization of 3D microstructures is critical for applications in optics, photonics, and biomedicine. Confocal laser scanning microscopy (CLSM) has emerged as a key technique for non-destructively characterizing microstructures fabricated via direct laser writing (DLW) lithography. CLSM offers high resolution and contrast scanning, simplified sample preparation and easy to operate, as well as lower cost compared to electron microscopy. In addition, CLSM allows rapid acquisition of longitudinal and cross-sectional images at any position in 3D microstructures. This review summarises recent CLSM applications for investigation of fabricated DLW microstructures. We discuss CLSM approaches for visualising internal microstructures, surface analysis, and the investigation of material properties. Furthermore, we discuss the utilization of CLSM in case studies of fabricated DLW microstructures for different applications. Finally, we provide our thoughts on future directions for CLSM integration with advanced fabrication techniques to expand characterization capabilities. Hence, we hope that this review will provide a fruitful insight for research communities in optical engineering, photonics, and materials science.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"S595 - S611"},"PeriodicalIF":0.48,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser-Assisted Control of Internal Flows in Evaporating Sessile Ethanol Droplets 激光辅助控制蒸发固定乙醇液滴内部流动

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714941

A. V. Dyshlyuk

引用次数: 0

Methods of Measurement Propagation Losses in Thin Film Lithium Niobate Waveguides 铌酸锂薄膜波导中传输损耗的测量方法

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714965

M. A. Vetoshkin, E. D. Voblikov, V. A. Zhuravlev, A. V. Bulatova, D. N. Moskalev, A. A. Kozlov, U. O. Salgaeva, V. V. Krishtop

引用次数: 0

Effect of Physical Impacts on the Sintering Kinetics of Metastable Aluminum Oxide Phases 物理影响对亚稳氧化铝相烧结动力学的影响

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825715004

A. V. Maletskii, D. R. Belichko, G. K. Volkova, R. Sh. Isayev, M. N. Iakimenko, A. A. Zozulia, L. V. Loladze, I. K. Nosolev, E. V. Morozov, D. A. Karpukhin

引用次数: 0

Near-Infrared Photothermal Efficient Ge Nanoparticles Synthesized via Nanosecond Laser Ablation in Liquid 纳米秒激光烧蚀制备近红外光热高效锗纳米颗粒

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714837

S. O. Gurbatov, D. E. Banniy, A. V. Shevlyagin, A. A. Kuchmizhak

{"title":"Near-Infrared Photothermal Efficient Ge Nanoparticles Synthesized via Nanosecond Laser Ablation in Liquid","authors":"S. O. Gurbatov, D. E. Banniy, A. V. Shevlyagin, A. A. Kuchmizhak","doi":"10.1134/S1062873825714837","DOIUrl":"10.1134/S1062873825714837","url":null,"abstract":"We have explored germanium nanoparticles (Ge NPs) as a potential material for photothermal therapy in cancer treatment. Given the high intrinsic optical absorption of bulk germanium in the near-infrared (NIR-I) biological transparency window, pulsed laser ablation in liquid (PLAL) was employed to produce a colloid of Ge NPs with a Mie-resonant size in the range of 100–500 nm. The heating efficiency of individual Ge NPs was evaluated using 785 nm laser irradiation, while the temperature-dependent shift in the Ge–Ge Raman band was monitored simultaneously. The maximum estimated temperature increase of 480 K at a laser power density of 3 mW/μm2 for Ge NPs with a diameter of 300 nm was confirmed with no signs of oxidation or structural degradation. This value is more than four times higher than that of pure silicon NPs of a similar size. Laser heating (808 nm, 4.5 W) of an isopropanol suspension containing Ge NPs demonstrated that their resonant size enables grounds for mild photothermal therapy with a linear light-to-heat conversion efficiency response to NPs concentration reaching 17%, and the potential to heat the suspension by ∆T = 5–50°C within an NPs concentration range of 1.25–10 μg/mL.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"S492 - S498"},"PeriodicalIF":0.48,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using Pulse-Width Modulation to Improve the Efficiency of a Power-over-Fiber System 利用脉宽调制提高光纤供电系统的效率

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714953

A. A. Garkushin, V. V. Krishtop, S. A. Storozhev, I. L. Volkhin

{"title":"Using Pulse-Width Modulation to Improve the Efficiency of a Power-over-Fiber System","authors":"A. A. Garkushin, V. V. Krishtop, S. A. Storozhev, I. L. Volkhin","doi":"10.1134/S1062873825714953","DOIUrl":"10.1134/S1062873825714953","url":null,"abstract":"The problem of low efficiency of power supply systems with energy transmission over optical fiber (Power-over-Fiber, PoF), belonging to the class of optoelectronic devices and systems, is investigated. It is shown that a significant decrease in efficiency occurs in the dynamic mode of operation under varying complex load. To solve this problem, a method based on the use of pulse-width modulation (PWM) of the laser diode pump current is proposed. This method allows maintaining high efficiency of the key system components even when operating at low average power levels. Computer simulation of the system was carried out in the MATLAB Simulink environment using digital twins. It is shown that the transition to the pulsed mode increases the system efficiency by 1–6% in the average optical power range of 0.75–15 W compared to the continuous mode, leveling its value to 12–14% over the entire operating range. The proposed method improves the efficiency and reliability of advanced optoelectronic systems for remote sensing, monitoring, and power supply in challenging electromagnetic and temperature conditions.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"S568 - S577"},"PeriodicalIF":0.48,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Femtosecond Laser Writing of Pd Patterns with Nanoflower Morphology on Silicon 飞秒激光在硅上刻写具有纳米花形态的Pd图案

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI: 10.1134/S1062873825714850

E. M. Khairullina, Yu. M. Borodaenko, M. V. Kaneva, A. S. Levshakova, S. O. Gurbatov, A. A. Kuchmizhak

{"title":"Femtosecond Laser Writing of Pd Patterns with Nanoflower Morphology on Silicon","authors":"E. M. Khairullina, Yu. M. Borodaenko, M. V. Kaneva, A. S. Levshakova, S. O. Gurbatov, A. A. Kuchmizhak","doi":"10.1134/S1062873825714850","DOIUrl":"10.1134/S1062873825714850","url":null,"abstract":"We report a single‑step, maskless route to fabricate palladium patterns directly on silicon using ultrashort‑pulse laser writing under a Pd‑salt solution. Varying the precursor concentration controls the morphology over a broad range. At ~10−6 M, the substrate shows subwavelength ripples characteristic of laser‑induced periodic surface structures (LIPSS) with no detectable Pd. At higher concentrations, the ripples become decorated with Pd nanoparticles, which then coalesce into continuous films that inherit the grooved relief, while at ≥10−3 M nanoflower‑like dendrites emerge. Arbitrary patterns (including line arrays, net‑like lattices, and dot arrays) are written with micrometer pitches and clear gaps between features. Post‑oxidation at 450°C converts Pd to PdO, as confirmed by the ~640 cm−1 Raman band. These Pd and PdO structures, with tunable nanoscale morphology, offer a direct pathway to integrated optical and resistive hydrogen‑sensor elements for on‑chip leak detection and safety monitoring across hydrogen production, storage, and distribution.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"S504 - S508"},"PeriodicalIF":0.48,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0