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Yakovlev DS, Lvov DS, Emelyanova OV, Dzhumaev PS, Shchetinin IV, Skryabina OV, Egorov SV, Ryazanov VV, Golubov AA, Roditchev D, Stolyarov VS. Physical Vapor Deposition Features of Ultrathin Nanocrystals of Bi 2(Te xSe 1-x) 3. J Phys Chem Lett 2022; 13:9221-9231. [PMID: 36170663 DOI: 10.1021/acs.jpclett.2c02664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Structural and electronic properties of ultrathin nanocrystals of chalcogenide Bi2(Tex Se1-x)3 were studied. The nanocrystals were formed from the parent compound Bi2Te2Se on as-grown and thermally oxidized Si(100) substrates using Ar-assisted physical vapor deposition, resulting in well-faceted single crystals several quintuple layers thick and a few hundreds nanometers large. The chemical composition and structure of the nanocrystals were analyzed by energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, electron backscattering, and X-ray diffraction. The electron transport through nanocrystals connected to superconducting Nb electrodes demonstrated Josephson behavior, with the predominance of the topological channels [Stolyarov et al. Commun. Mater., 2020, 1, 38]. The present paper focuses on the effect of the growth conditions on the morphology, structural, and electronic properties of nanocrystals.
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Affiliation(s)
- Dmitry S Yakovlev
- Center for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
- Russian Quantum Center, Skolkovo, Moscow Region 143025, Russia
| | - Dmitry S Lvov
- Institute of Solid State Physics RAS, Chernogolovka, Moscow Region 142432, Russia
| | | | - Pave S Dzhumaev
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - Igor V Shchetinin
- National University of Science and Technology MISIS, Moscow 119049, Russia
| | - Olga V Skryabina
- Center for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
- Institute of Solid State Physics RAS, Chernogolovka, Moscow Region 142432, Russia
- National University of Science and Technology MISIS, Moscow 119049, Russia
| | - Sergey V Egorov
- Russian Quantum Center, Skolkovo, Moscow Region 143025, Russia
- Institute of Solid State Physics RAS, Chernogolovka, Moscow Region 142432, Russia
| | - Valery V Ryazanov
- Russian Quantum Center, Skolkovo, Moscow Region 143025, Russia
- Institute of Solid State Physics RAS, Chernogolovka, Moscow Region 142432, Russia
- National University of Science and Technology MISIS, Moscow 119049, Russia
| | - Alexander A Golubov
- Faculty of Science and Technology, MESA+ Institute of Nanotechnology, Enschede 7500 AE, The Netherlands
| | - Dimitri Roditchev
- Laboratoire de Physique et d'Étude des Matériaux (LPEM), UMR-8213, ESPCI Paris, PSL Research University, CNRS, Sorbonne Université, Paris 75005, France
| | - Vasily S Stolyarov
- Center for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region 141700, Russia
- National University of Science and Technology MISIS, Moscow 119049, Russia
- Dukhov Research Institute of Automatics (VNIIA), Moscow 127055, Russia
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Experimental Study of Plasma Plume Analysis of Long Pulse Laser Irradiates CFRP and GFRP Composite Materials. CRYSTALS 2021. [DOI: 10.3390/cryst11050545] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The application of laser fabrication of fiber-reinforced polymer (FRP) has an irreplaceable advantage. However, the effect of the plasma generated in laser fabrication on the damage process is rarely mentioned. In order to further study the law and mechanism of laser processing, the laser process was measured. CFRP and GFRP materials were damaged by a 1064 nm millisecond pulsed laser. Moreover, the propagation velocity and breakdown time of plasma plume were compared. The results show that GFRP is more vulnerable to breakdown than CFRP under the same conditions. In addition, the variation of plasma plume and material surface temperature with the number of pulses was also studied. The results show that the variation trend is correlated, that is, the singularities occur at the second pulse. Based on the analysis of experimental phenomena, this paper provides guidance for plasma phenomena in laser processing of composite materials.
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