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arXiv: Soft Condensed Matter最新文献

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DNA topology dictates strength and flocculation in DNA-microtubule composites DNA拓扑结构决定了DNA-微管复合材料的强度和絮凝性
arXiv: Soft Condensed Matter Pub Date : 2021-05-06 DOI: 10.21203/RS.3.RS-498534/V1
K. Peddireddy, D. Michieletto, Gina Aguirre, Jonathan Garamella, Pawan Khanal, R. Robertson-Anderson
{"title":"DNA topology dictates strength and flocculation in DNA-microtubule composites","authors":"K. Peddireddy, D. Michieletto, Gina Aguirre, Jonathan Garamella, Pawan Khanal, R. Robertson-Anderson","doi":"10.21203/RS.3.RS-498534/V1","DOIUrl":"https://doi.org/10.21203/RS.3.RS-498534/V1","url":null,"abstract":"\u0000 Polymer composites are ubiquitous in biology and industry alike, owing to their emergent desirable mechanical properties not attainable in single-species systems. At the same time, polymer topology has been shown to play a key role in tuning the rheology of polymeric fluids. However, how topology impacts the rheology of composites remains poorly understood. Here, we create composites of rigid rods (microtubules) polymerized within entangled solutions of flexible linear and ring polymers (DNA). We couple linear and nonlinear optical tweezers microrheology with confocal microscopy and scaled particle theory to show that composites of linear DNA and microtubules exhibit a strongly non-monotonic dependence of elasticity and stiffness on microtubule concentration due to depletion-driven polymerization and flocculation of microtubules. In contrast, composites of ring DNA and microtubules show a much more modest monotonic increase in elastic strength with microtubule concentration, which we demonstrate arises from the increased ability of rings to mix with microtubules.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89001760","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
Physics of Suction Cups in Air and in Water 空气和水中吸盘的物理学
arXiv: Soft Condensed Matter Pub Date : 2021-01-01 DOI: 10.1007/978-3-030-67227-0_10
A. Tiwari, B. Persson
{"title":"Physics of Suction Cups in Air and in Water","authors":"A. Tiwari, B. Persson","doi":"10.1007/978-3-030-67227-0_10","DOIUrl":"https://doi.org/10.1007/978-3-030-67227-0_10","url":null,"abstract":"","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"43 12","pages":"187-209"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91430633","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: 2
Tuning thermal transport in highly cross-linked polymers by bond-induced void engineering 利用键诱导空洞工程调节高交联聚合物的热输运
arXiv: Soft Condensed Matter Pub Date : 2020-12-17 DOI: 10.1103/PHYSREVMATERIALS.5.025602
D. Mukherji, M. Singh
{"title":"Tuning thermal transport in highly cross-linked polymers by bond-induced void engineering","authors":"D. Mukherji, M. Singh","doi":"10.1103/PHYSREVMATERIALS.5.025602","DOIUrl":"https://doi.org/10.1103/PHYSREVMATERIALS.5.025602","url":null,"abstract":"Tuning the heat flow is fundamentally important for the design of advanced functional materials. Here, polymers are of particular importance because they provide different pathways for the energy transfer. More specifically, the heat flow between two covalently bonded monomers is over 100 times faster than between the two non-bonded monomers interacting via van der Waals (vdW) forces. Therefore, the delicate balance between these two contributions often provide a guiding tool for the tunability in thermal transport coefficient k of the polymeric materials. Traditionally most studies have investigated k in the linear polymeric materials, the recent interests have also been directed towards the highly cross-linked polymers (HCP). In this work, using the generic molecular dynamics simulations we investigate the factors effecting k of HCP. We emphasize on the importance of the cross-linking bond types and its influence on the network microstructure with a goal to provide a guiding principle for the tunability in k. While these simulation results are discussed in the context of the available experimental data, we also make predictions.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88625923","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: 6
Alignment-induced reconfigurable walls for patterning and assembly of liquid crystal skyrmions 对准诱导的可重构壁的图案和组装的液晶天空
arXiv: Soft Condensed Matter Pub Date : 2020-12-13 DOI: 10.1103/PHYSREVRESEARCH.3.L012005
Ayhan Duzgun, A. Saxena, Jonathan V Selinger
{"title":"Alignment-induced reconfigurable walls for patterning and assembly of liquid crystal skyrmions","authors":"Ayhan Duzgun, A. Saxena, Jonathan V Selinger","doi":"10.1103/PHYSREVRESEARCH.3.L012005","DOIUrl":"https://doi.org/10.1103/PHYSREVRESEARCH.3.L012005","url":null,"abstract":"Skyrmions have attracted rapidly growing interest due to their topological properties and unique aspects for potential novel applications such as data storage and soft robotics. They can also serve as key elements for materials by design, self-assembly, and functional soft materials. While not real particles, these skyrmions behave like particles-they interact with each other and can be actuated by means of electric field, surface anchoring, and light. On the other hand, they are field configurations which have properties not possessed by real particles. Here, we show that, by means of alignment induced attractive and repulsive walls, skyrmions in chiral nematic liquid crystals can be precisely controlled and programmed to serve as suitable building blocks for the realization of the above goals. Our work may stimulate new experimental efforts and concomitant applications in this direction.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75774493","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: 6
Theory of Inhomogeneous Calamitic Coulomb Fluids 非均匀灾难性库仑流体理论
arXiv: Soft Condensed Matter Pub Date : 2020-12-11 DOI: 10.20944/preprints202012.0323.v1
R. Podgornik
{"title":"Theory of Inhomogeneous Calamitic Coulomb Fluids","authors":"R. Podgornik","doi":"10.20944/preprints202012.0323.v1","DOIUrl":"https://doi.org/10.20944/preprints202012.0323.v1","url":null,"abstract":"A field theoretic representation of the classical partition function is derived for a system composed of a mixture of anisotropic and isotropic mobile charges that interact via long range Coulomb and short range nematic interactions. The field theory is then solved on a saddle-point approximation level, leading to a coupled system of Poisson-Boltzmann and Maier-Saupe equations. Explicit solutions are finally obtained for a calamitic counterion-only system in proximity of a charged planar wall. The nematic order parameter profile, the counterion density profile and the electrostatic potential profile are interpreted within the framework of a nematic-isotropic wetting phase with a Donnan potential difference.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89561772","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
Disk wrinkling under gravity. 圆盘在重力作用下起皱。
arXiv: Soft Condensed Matter Pub Date : 2020-11-28 DOI: 10.1016/J.IJSOLSTR.2021.111214
G. Boedec, J. Deschamps
{"title":"Disk wrinkling under gravity.","authors":"G. Boedec, J. Deschamps","doi":"10.1016/J.IJSOLSTR.2021.111214","DOIUrl":"https://doi.org/10.1016/J.IJSOLSTR.2021.111214","url":null,"abstract":"","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85732590","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
Nano-confinement effects on liquid pressure 纳米约束对液体压力的影响
arXiv: Soft Condensed Matter Pub Date : 2020-11-27 DOI: 10.1063/5.0044938
An Zou, S. Maroo
{"title":"Nano-confinement effects on liquid pressure","authors":"An Zou, S. Maroo","doi":"10.1063/5.0044938","DOIUrl":"https://doi.org/10.1063/5.0044938","url":null,"abstract":"In this work, molecular dynamics simulations are performed to estimate the equilibrium pressure of liquid confined in nanopores. The simulations show that the pressure is highly sensitive to the pore size and can significantly change from absolute positive to negative values for a very small (0.1 nm) change in pore size. The contribution from the solid-liquid interaction always dominates the pressure in the first liquid layer adjacent to the surface and the sensitiveness of pressure on the pore size is due to the atom distribution in the liquid layers. A surface influence number S is introduced to quantitatively characterize the degree of the confinement. The S number decreases with increasing pore size based on a power law function at constant system temperature. In nanopores with large S number, the pore liquid pressure is found to be independent of bulk liquid pressure while the pore pressure increases with bulk pressure in nanopores with small S number.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78354566","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: 6
Linear Viscoelasticity of Dumbbells Interacting via Gaussian Soft-Core Potential 高斯软核势作用下哑铃的线性粘弹性
arXiv: Soft Condensed Matter Pub Date : 2020-11-25 DOI: 10.1678/RHEOLOGY.49.61
Takashi Uneyama
{"title":"Linear Viscoelasticity of Dumbbells Interacting via Gaussian Soft-Core Potential","authors":"Takashi Uneyama","doi":"10.1678/RHEOLOGY.49.61","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.49.61","url":null,"abstract":"In polymer melts, the interaction between segments are considered to be screened and the ideal Gaussian chain statistics is recovered. The experimental fact that linear viscoelasticity of unentangled polymers can be well described by the Rouse model is naively considered as due to this screening effect. Although various theoretical models are based on the screening effect and the screening effect is believed to be reasonable, the screening effect cannot be fully justified on a solid theoretical basis. In this work, we study the screening effect by utilizing a simple dumbbell type model. We perform simulations for dumbbell systems in which particles interact via the Gaussian soft-core potential. We show that, if the density of dumbbells is high, the Gaussian soft-core interaction is actually screened and the static structures are well described by the ideal model without Gaussian soft-core interaction. We also show that the relaxation moduli of interacting dumbbell systems approximately coincide to those of the non-interacting dumbbell systems. In the low density systems, we observe the deviations from the ideal non-interacting systems. For example, the relaxation moduli become relatively broad. However, the relaxation moduli of such systems can be decomposed into the relaxation modes by the Gaussian soft-core interaction and the bond. The bond relaxation mode can be successfully described by a single Maxwell relaxation with effective relaxation strength and time. Our results support a naive use of the Rouse model to analyze unentangled polymer melts.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91097873","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
Static and dynamic properties of block copolymer based grafted nanoparticles across the non-ergodicity transition 嵌段共聚物接枝纳米颗粒在非遍历过渡中的静态和动态性质
arXiv: Soft Condensed Matter Pub Date : 2020-11-12 DOI: 10.1063/5.0031862
D. Parisi, J. Ruiz-Franco, Yingbo Ruan, C. Liu, B. Loppinet, E. Zaccarelli, D. Vlassopoulos
{"title":"Static and dynamic properties of block copolymer based grafted nanoparticles across the non-ergodicity transition","authors":"D. Parisi, J. Ruiz-Franco, Yingbo Ruan, C. Liu, B. Loppinet, E. Zaccarelli, D. Vlassopoulos","doi":"10.1063/5.0031862","DOIUrl":"https://doi.org/10.1063/5.0031862","url":null,"abstract":"We present a systematic investigation of static and dynamic properties of block copolymer micelles with crosslinked cores, representing model polymer-grafted nanoparticles, over a wide concentration range from dilute regime to an arrested (crystalline) state, by means of light and neutron scattering, complemented by linear viscoelasticity. We have followed the evolution of their scattering intensity and diffusion dynamics throughout the non-ergodicity transition and the observed results have been contrasted against appropriately coarse-grained Langevin Dynamics simulations. These stable model soft particles of the core-shell type are situated between ultrasoft stars and hard spheres, and the well-known star pair interaction potential is not appropriate to describe them. Instead, we have found that an effective brush interaction potential provides very satisfactory agreement between experiments and simulations, offering insights into the interplay of softness and dynamics in spherical colloidal suspensions.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"141 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83153186","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: 5
Polymer translocation through a nanopore assisted by an environment of active rods 在活性棒的环境下，聚合物通过纳米孔进行易位
arXiv: Soft Condensed Matter Pub Date : 2020-11-09 DOI: 10.1103/PHYSREVRESEARCH.3.013080
Hamidreza Khalilian, J. Sarabadani, T. Ala‐Nissila
{"title":"Polymer translocation through a nanopore assisted by an environment of active rods","authors":"Hamidreza Khalilian, J. Sarabadani, T. Ala‐Nissila","doi":"10.1103/PHYSREVRESEARCH.3.013080","DOIUrl":"https://doi.org/10.1103/PHYSREVRESEARCH.3.013080","url":null,"abstract":"We use a combination of computer simulations and iso-flux tension propagation (IFTP) theory to investigate translocation dynamics of a flexible linear polymer through a nanopore into an environment composed of repulsive active rods in 2D. We demonstrate that the rod activity induces a crowding effect on the polymer, leading to a time-dependent net force that facilitates translocation into the active environment. Incorporating this force into the IFTP theory for pore-driven translocation allows us to characterise translocation dynamics in detail and derive a scaling form for the average translocation time as $tilde{tau} sim tilde{L}_{textrm{r}}^{nu} / tilde{F}_{textrm{SP}} $, where $tilde{L}_{textrm{r}}$ and $tilde{F}_{textrm{SP}}$ are the rod length and self-propelling force acting on the rods, respectively, and $nu$ is the Flory exponent.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81296863","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: 3
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