发布求助
文献互助 智能选刊 最新文献

Technical Physics Letters最新文献

筛选
英文 中文
Array Radio Imaging Based on Heterodyne Detection with Application of the Continuous-Wave Radar Technique 基于异频探测的阵列无线电成像技术与连续波雷达技术的应用
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180074
S. A. Korolyov, A. V. Goryunov, V. V. Parshin
{"title":"Array Radio Imaging Based on Heterodyne Detection with Application of the Continuous-Wave Radar Technique","authors":"S. A. Korolyov, A. V. Goryunov, V. V. Parshin","doi":"10.1134/s1063785023180074","DOIUrl":"https://doi.org/10.1134/s1063785023180074","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A new approach to the creation of millimeter-wave radio imaging systems is proposed. This approach is based on the use of an array receiver consisting of a densely packed (pixel size of 4 mm) array of planar mixers located in the focal plane of a quasi-optical objective, with application of the frequency-modulated continuous-wave radar technique. It has been demonstrated that the implementation of the heterodyne type of reception makes it possible to increase the distance range of the array radio imaging system up to ~100 m while maintaining the angular resolution at the previous level.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"82 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179517","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
Investigation of the Interfacial Tension at the Interface Between Water and Asphaltene Solution in Toluene 水与甲苯中沥青溶液界面的界面张力研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180190
R. R. Zinnatullin, A. I. Iskandarov, L. A. Kovaleva
{"title":"Investigation of the Interfacial Tension at the Interface Between Water and Asphaltene Solution in Toluene","authors":"R. R. Zinnatullin, A. I. Iskandarov, L. A. Kovaleva","doi":"10.1134/s1063785023180190","DOIUrl":"https://doi.org/10.1134/s1063785023180190","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The dynamics of the interfacial tension coefficient at the interface between water and model solutions of asphaltenes of different concentrations in toluene has been studied. It has been shown that, over time, the interfacial tension decreases due to the adsorption of asphaltene molecules at the interface. With an increase in the concentration of asphaltenes in the solution, the decrease in interfacial tension occurs more intensively. The results of a study of the elongation of a water drop in a solution under the influence of an electric field are presented. It is shown that after the formation of an adsorption film, a higher electric field must be applied to stretch the droplet, and the relative elongation depends nonlinearly on the applied voltage.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"10 5 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179528","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 Influence of Carbon Black Content on Temperature Dependences of Electrical Conductivity of Polymer Composite 炭黑含量对聚合物复合材料电导率温度依赖性的影响
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180219
A. M. Zyuzin, A. A. Karpeev, N. V. Yantsen
{"title":"The Influence of Carbon Black Content on Temperature Dependences of Electrical Conductivity of Polymer Composite","authors":"A. M. Zyuzin, A. A. Karpeev, N. V. Yantsen","doi":"10.1134/s1063785023180219","DOIUrl":"https://doi.org/10.1134/s1063785023180219","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>It was found that in the region of the percolation threshold, depending on the dominance of one or another conduction mechanism, the temperature dependence of the specific volume resistivity ρ(<i>T</i>) of the polymer composite based on a matrix of ethylene vinyl acetate is significantly transformed. With an increase in the CB content, there is a decrease by several orders of magnitude in the maximum value of the relative resistivity ρ(<i>T</i>)<sub>max</sub>/ρ<sub>20</sub> in its temperature dependence. Peroxide crosslinking of matrix macromolecules leads to a change in the nature of the temperature dependence of resistivity.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"30 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179568","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 Intermolecular Interaction Influence on Non-Linear Optical Properties in COANP–Carbon Nanoparticles System COANP - 碳纳米颗粒体系中分子间相互作用对非线性光学特性的影响
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180098
S. V. Likhomanova, N. V. Kamanina
{"title":"The Intermolecular Interaction Influence on Non-Linear Optical Properties in COANP–Carbon Nanoparticles System","authors":"S. V. Likhomanova, N. V. Kamanina","doi":"10.1134/s1063785023180098","DOIUrl":"https://doi.org/10.1134/s1063785023180098","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The main results of non-linear optical, spectral and current–voltage characteristics research of pyridine organic conjugated molecule-carbon nanoparticles combined system have been presented. The perspective of these materials further study in global trends of modern search of materials for optical limiting has been demonstrated also in the present paper.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"15 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179519","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
Plasma-Chemical Method of Silicon Carbide Modification to Obtain Particles with Controlled Surface Morphology 用等离子体化学方法对碳化硅进行改性以获得表面形态可控的颗粒
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180189
T. A. Shalygina, M. S. Rudenko, I. V. Nemtsev, V. A. Parfenov, S. Yu. Voronina
{"title":"Plasma-Chemical Method of Silicon Carbide Modification to Obtain Particles with Controlled Surface Morphology","authors":"T. A. Shalygina, M. S. Rudenko, I. V. Nemtsev, V. A. Parfenov, S. Yu. Voronina","doi":"10.1134/s1063785023180189","DOIUrl":"https://doi.org/10.1134/s1063785023180189","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A plasma-chemical method for the modification of silicon carbide particles is presented, which makes it possible to obtain particles with a controlled surface morphology. The variable parameter of particle processing was the ratio of the fraction of plasma-forming (Ar) and additional (H) gases. It was shown that at Ar/H = 100/0, the formation of a carbon shell is observed; at Ar/H ratios of 91/9 and 84/16, the particles are characterized by a carbon shell decorated with silicon nanoparticles or nanowires, respectively. The modified particles were analyzed using scanning electron microscopy and Raman spectroscopy.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"171 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179526","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
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":"154 1","pages":""},"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
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":"72 1","pages":""},"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":"48 1","pages":""},"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
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":"16 1","pages":""},"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
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":"7 1","pages":""},"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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信