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Growth Mechanism of Monolayer on the Top Facet of Ga-Catalyzed GaAs and GaP Nanowires 镓催化砷化镓和磷化镓纳米线顶面单层的生长机制
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170133
A. A. Koryakin, Yu. A. Eremeev, S. V. Fedina, V. V. Fedorov
{"title":"Growth Mechanism of Monolayer on the Top Facet of Ga-Catalyzed GaAs and GaP Nanowires","authors":"A. A. Koryakin, Yu. A. Eremeev, S. V. Fedina, V. V. Fedorov","doi":"10.1134/s1063785023170133","DOIUrl":"https://doi.org/10.1134/s1063785023170133","url":null,"abstract":"<p><b>Abstract</b>—The growth mechanism of monolayer on the top facet of Ga-catalyzed GaAs and GaP nanowires is investigated. Within the framework of a theoretical model, the maximal monolayer coverage due to the material in the catalyst droplet, the nanowire growth rate and the content of group V atoms in the droplet are found depending on the growth conditions. The estimates of the phosphorus re-evaporation coefficient from neighboring nanowires and substrate are obtained by comparing the theoretical and experimental growth rate of Ga-catalyzed GaP nanowires.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Losses Measurement Method for Transmission Lines at mmWave 毫米波传输线损耗测量方法
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s106378502317011x
N. S. Knyazev, A. I. Malkin, V. A. Chechetkin
{"title":"Losses Measurement Method for Transmission Lines at mmWave","authors":"N. S. Knyazev, A. I. Malkin, V. A. Chechetkin","doi":"10.1134/s106378502317011x","DOIUrl":"https://doi.org/10.1134/s106378502317011x","url":null,"abstract":"<p><b>Abstract</b>—An experimental method was developed to determine losses in microstrip and coplanar transmission lines for devices operating in the frequency range of 77–81 GHz. The parameters of the scattering matrices are obtained using a vector network analyzer and frequency upconverters. The calculation of losses in waveguide-coplanar and coplanar-microstrip adapters is made.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of He:O Plasma Treatment on the Structure of Multi-Walled Carbon Nanotubes 等离子体 He:O 处理对多壁碳纳米管结构的影响
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180037
V. V. Bolotov, E. V. Knyazev, S. N. Nesov
{"title":"The Effect of He:O Plasma Treatment on the Structure of Multi-Walled Carbon Nanotubes","authors":"V. V. Bolotov, E. V. Knyazev, S. N. Nesov","doi":"10.1134/s1063785023180037","DOIUrl":"https://doi.org/10.1134/s1063785023180037","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The functionalization of multi-walled carbon nanotubes in He:O plasma is investigated. It is shown that plasma treatment leads to the removal of defective outer graphene layers and their fragments due to oxidation. It is established that the surface of functionalized multi-walled carbon nanotubes contains numerous uncoordinated carbon atoms and oxygen-containing functional groups. The preservation of the structure of the internal graphene layers of nanotubes and the formation of broken chemical bonds ensure a decrease in electrical resistance. At the same time, there is a narrowing of the distribution of electrical resistance values of nanotube ensembles.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ferroelectric Properties of Heterostructure Sr0.5Ba0.5Nb2O6/Ba0.2Sr0.8TiO3/Si(001) Sr0.5Ba0.5Nb2O6/Ba0.2Sr0.8TiO3/Si(001) 异质结构的铁电特性
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180050
D. A. Kiselev, A. V. Pavlenko, S. P. Zinchenko
{"title":"Ferroelectric Properties of Heterostructure Sr0.5Ba0.5Nb2O6/Ba0.2Sr0.8TiO3/Si(001)","authors":"D. A. Kiselev, A. V. Pavlenko, S. P. Zinchenko","doi":"10.1134/s1063785023180050","DOIUrl":"https://doi.org/10.1134/s1063785023180050","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The properties of <b><i>c</i></b>-oriented thin films of Sr<sub>0.5</sub>Ba<sub>0.5</sub>Nb<sub>2</sub>O<sub>6</sub> grown on a Si(001) (<i>p</i>-type) substrate with a pre-deposited Ba<sub>0.2</sub>Sr<sub>0.8</sub>TiO<sub>3</sub> layer were studied using scanning probe microscopy and dielectric spectroscopy. It is established that the Sr<sub>0.5</sub>Ba<sub>0.5</sub>Nb<sub>2</sub>O<sub>6</sub> films are characterized by low surface roughness (less than 6 nm) and average crystallite size of ~93 nm. It is shown that there is spontaneous polarization in the film directed from its surface to the substrate, which causes the manifestation of the field effect for the case of the Si substrate with <i>p</i>-type conductivity without the external field effect. Differences in the magnitudes of the surface potential signal for regions polarized by an external electric field of different polarities (+10 and –10 V), as well as in their relaxation to the initial state, are revealed. The reasons for the established patterns are discussed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temporal Pattern of Microcracking in Impact–Damaged Porous SiC Ceramics 冲击损坏的多孔碳化硅陶瓷中微裂纹的时间模式
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170212
I. P. Shcherbakov, A. G. Kadomtsev, A. E. Chmel
{"title":"Temporal Pattern of Microcracking in Impact–Damaged Porous SiC Ceramics","authors":"I. P. Shcherbakov, A. G. Kadomtsev, A. E. Chmel","doi":"10.1134/s1063785023170212","DOIUrl":"https://doi.org/10.1134/s1063785023170212","url":null,"abstract":"<p><b>Abstract</b>—Temporal characteristics of the localized damage development initiated by a short-time impact pointed loading of SiC ceramics which is widely applied as a protective material against the shock action upon engineering constructions and people were investigated. The statistics of crack nucleation and relaxation was studied with the methods of acoustic emission and electromagnetic emission, correspondingly. It was shown that the length of intervals between microcrack nucleations follows a power law specific to cooperative phenomena. The time distribution of decaying electric charges which appear on impact-induced crack edges and annihilate after the passage of impact wave was, in contrast, linear. The temporal pattern of the crack relaxation permitted identifying two sets of newly formed damages that are the tiny cracks localized in the grain bulk and those that interconnect grains.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Acousto-Optic Wavelet Processing of Bioelectric Signals 生物电信号的声光小波处理
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170236
K. V. Zaichenko, B. S. Gurevich
{"title":"Acousto-Optic Wavelet Processing of Bioelectric Signals","authors":"K. V. Zaichenko, B. S. Gurevich","doi":"10.1134/s1063785023170236","DOIUrl":"https://doi.org/10.1134/s1063785023170236","url":null,"abstract":"<p><b>Abstract</b>—Wavelet analysis is one of the most efficient methods of the informative signals characteristics investigation. First shown the possibility of informative signals wavelet processing by means of the acousto-optic processor with time integration. The possibility of the realization of both power spectrum calculation and performance of wavelet transform of bioelectric signals in the real time mode has been proved. The analysis is listed which describes its operation in different modes.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Method to Detect the Characteristics of Intermittent Generalized Synchronization Based on Calculation of Probability of the Synchronous Regime Observation 基于同步状态观测概率计算的间歇性广义同步特征检测方法
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180116
O. I. Moskalenko, A. A. Koronovskii, A. O. Selskii, E. V. Evstifeev
{"title":"A Method to Detect the Characteristics of Intermittent Generalized Synchronization Based on Calculation of Probability of the Synchronous Regime Observation","authors":"O. I. Moskalenko, A. A. Koronovskii, A. O. Selskii, E. V. Evstifeev","doi":"10.1134/s1063785023180116","DOIUrl":"https://doi.org/10.1134/s1063785023180116","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A method to define the characteristic phases in the behavior of unidirectionally coupled systems located near the boundary of the generalized chaotic synchronization regime onset based on calculating the probability of the synchronous regime observation in an ensemble of coupled systems is proposed. Using the example of unidirectionally coupled Rössler systems in the band chaos regime, we have shown its efficiency in comparison with other known methods for detecting the characteristics of intermittent generalized synchronization.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Map of Water–Oil Flow Regimes in a Direct Microchannel 直接微通道中的水-油流态图
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180165
M. I. Pryazhnikov, A. V. Minakov, A. I. Pryazhikov, A. S. Yakimov
{"title":"Map of Water–Oil Flow Regimes in a Direct Microchannel","authors":"M. I. Pryazhnikov, A. V. Minakov, A. I. Pryazhikov, A. S. Yakimov","doi":"10.1134/s1063785023180165","DOIUrl":"https://doi.org/10.1134/s1063785023180165","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The flow regimes of water and crude oil in a <i>Y</i>-type microchannel were studied in a wide range of flow rates. Four different types of water-oil flow regimes have been identified: plug, droplet, parallel and chaotic. The ranges of existence of these flow regimes have been determined. Dependences of the length of water plugs and droplets in oil on various parameters have been established. Maps of the corresponding water-oil flow regimes have been constructed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Investigation of the Hydrodynamic Drag of a Slit Microchannel with a Textured Wall 带纹理壁的狭缝微通道的流体动力阻力研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180104
A. S. Lobasov, A. V. Minakov
{"title":"The Investigation of the Hydrodynamic Drag of a Slit Microchannel with a Textured Wall","authors":"A. S. Lobasov, A. V. Minakov","doi":"10.1134/s1063785023180104","DOIUrl":"https://doi.org/10.1134/s1063785023180104","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of numerical investigation of the hydrodynamic drag of a slit microchannel with a textured wall surface, as well as of the pressure drop in such a channel and the effective slip length on the wall for various Reynolds numbers, are presented. The channel height was 10 μm, and the length varied from 25 to 500 μm. It was found that the pressure drop in the textured microchannel was less than in a conventional one at any length. The dependences of the relative pressure drop, friction factor, and effective slip length on the Reynolds number were obtained for various channel lengths. A correlation that describes the dependence of the relative pressure drop on the Reynolds number for small channel lengths was proposed. The friction factor was described by a correlation expressed as 20/Re.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research of Dielectric Properties of Oil Dispersed Systems Depending on the Ratio of Asphalt–Resinous Substances 取决于沥青-树脂物质比例的油分散体系介电性能研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180207
R. R. Zinnatullin, L. A. Kovaleva
{"title":"Research of Dielectric Properties of Oil Dispersed Systems Depending on the Ratio of Asphalt–Resinous Substances","authors":"R. R. Zinnatullin, L. A. Kovaleva","doi":"10.1134/s1063785023180207","DOIUrl":"https://doi.org/10.1134/s1063785023180207","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The degree of influence of the electromagnetic field on oil dispersed systems depends on the dielectric properties of these systems, in particular oil. Dielectric properties of oil depend on the content of high molecular weight polar components: asphaltenes and resins. In this regard, a study was carried out of the dielectric properties of oil in the radio-frequency range, depending on the content of asphalt–resinous substances in it. The obtained results of experimental studies show the correlation of dielectric parameters with the ratio of the content of resins and asphaltenes in oil.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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