OAJ Materials and Devices最新文献_第5页

Lecture on the anomalous diffusion in Condensed Matter Physics 关于凝聚态物理中的反常扩散的讲座

OAJ Materials and Devices Pub Date : 2018-08-27 DOI: 10.23647/ca.md20180730

M. Benhamou

{"title":"Lecture on the anomalous diffusion in Condensed Matter Physics","authors":"M. Benhamou","doi":"10.23647/ca.md20180730","DOIUrl":"https://doi.org/10.23647/ca.md20180730","url":null,"abstract":"Diffusion is a natural or artificial process that governs many phenomena in nature. The most known diffusion is the Brownian or normal motion, where the mean-square-displacement of the tracer (diffusive particle among others) increases as the square-root of time. It is not the case, however, for complex systems, where the diffusion is rather slow, because at small-scales, these media present an heterogenous structure. This kind of slow motion is called subdiffusion, where the associated mean-square-displacement increases in time, with a non trivial exponent, alpha, whose value is between 0 and 1. In this review paper, we report on new trends dealing with the study of the anomalous diffusion in Condensed Matter Physics. The study is achieved using a theoretical approach that is based on a Generalized Langevin Equation. As particular crowded systems, we choose the so-called Pickering emulsions (oil-in-water), and we are interested in how the dispersed droplets (protected by small solid charged nanoparticles) can diffuse in the continuous phase (water). Dynamic study is accomplished through the mean-square-displacement and the velocity-autocorrelation-function. Finally, a comparison with Molecular Dynamics data is made.","PeriodicalId":19388,"journal":{"name":"OAJ Materials and Devices","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75341226","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: 1

Investigation of DNA denaturation from generalized Morse potential 广义莫尔斯势对DNA变性的研究

OAJ Materials and Devices Pub Date : 2018-07-11 DOI: 10.23647/ca.md20180207

R. El Kinani, H. Kaidi, M. Benhamou

引用次数: 0

Carbon nanotubes functionalized with copper hexacyanoferrate nanoparticles for a selective extraction of cesium from liquid waste 六氰高铁酸铜功能化碳纳米管对废液中铯的选择性萃取

OAJ Materials and Devices Pub Date : 2018-07-02 DOI: 10.23647/CA.MD20180407

H. Draouil, L. Alvarez, J. Causse, V. Flaud, M. Zaibi, J. Bantignies, M. Oueslati, J. Cambedouzou

引用次数: 0

Extensive study of cage effect and subdiffusion in Pickering emulsions using molecular dynamics simulations 利用分子动力学模拟广泛研究皮克林乳剂中的笼形效应和亚扩散

OAJ Materials and Devices Pub Date : 2018-05-04 DOI: 10.23647/ca.md20182404

S. El-moudny, M. Benhamou

{"title":"Extensive study of cage effect and subdiffusion in Pickering emulsions using molecular dynamics simulations","authors":"S. El-moudny, M. Benhamou","doi":"10.23647/ca.md20182404","DOIUrl":"https://doi.org/10.23647/ca.md20182404","url":null,"abstract":"In this work, we aim at an extensive study of the diffusion phenomenon of oil-droplets dispersed in water onto which are strongly adsorbed charged point-like particles (Pickering emulsions). This diffusion that originates from multiple collisions with the molecules of water, is anomalous, due to the presence of relatively strong correlations between the moving oil-droplets. Using Molecular Dynamic simulation, with a pair-potential of Sogami-Ise type, we first observe that the random walkers execute a normal diffusion, at intermediate time, followed by a slow diffusion (subdiffusion) we attribute to the presence of cages, formed by the nearest neighbors (traps). In the cage-regime, we find that the mean-square-displacement increases according to a time-power law, with an anomalous diffusion exponent between 0 and 1. The existence of a cage effect is shown also by computing the velocity auto-correlation function of the random walker. It is found that, in a cage, this function is governed by an underdamped (oscillatory) behavior, for strong densities and surface charges, and low-salt concentration. In the inverse situation, however, we observe that this correlation-function is rather overdamped (non-oscillatory). In the two cases, at large-time, this function fails according to a time-power law.","PeriodicalId":19388,"journal":{"name":"OAJ Materials and Devices","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87078215","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

ZnTe/CdSe type-II core/shell spherical quantum dot under an external electric field 外加电场作用下的ZnTe/CdSe型核/壳球形量子点

OAJ Materials and Devices Pub Date : 2018-04-07 DOI: 10.23647/ca.md20180504

A. Chafai

引用次数: 2

Vortex phase transition and superconducting properties in quasi-two-dimensional k-(BEDT-TTF)2Cu[N(CN)2]Br organic superconductor 准二维k-(BEDT-TTF)2Cu[N(CN)2]Br有机超导体的涡旋相变和超导性能

OAJ Materials and Devices Pub Date : 2018-03-21 DOI: 10.23647/ca.md20181603

H. Ouaddi, A. Tirbiyine, A. Taoufik, Y. A. Ahmed, Fatiha Chiban, H. Chaib, A. Nafidi, S. Senoussi

引用次数: 0

Raman active modes in defective peapods 缺陷豆荚的拉曼活性模式

OAJ Materials and Devices Pub Date : 2018-03-09 DOI: 10.23647/ca.md20180803

F. Fergani, S.M. Ait Abdelkader, H. Chadli, A. Rahmani, A. Rahmani