IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-28 DOI: 10.1039/D5SM90070K

Stephen A. Crane, Felipe Jiménez-Ángeles, Yiming Wang, Luis E. Ortuno Macias, Jason G. Marmorstein, Jiayi Deng, Mehdi Molaei, E. James Petersson, Ravi Radhakrishnan, Cesar de la Fuente-Nunez, Monica Olvera de la Cruz, Raymond S. Tu, Charles Maldarelli, Ivan J. Dmochowski and Kathleen J. Stebe

引用次数: 0

Correction: Protein–polyelectrolyte complexation: effects of sterically repulsive groups, macromolecular architecture and hierarchical assembly 修正：蛋白质-多电解质络合：立体排斥基团、大分子结构和层次组装的影响

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-24 DOI: 10.1039/D5SM90071A

Raman Hlushko, Alexander Marin and Alexander K. Andrianov

引用次数: 0

Modification of membrane properties using ionic liquids investigated with Langmuir monolayers and bilayers in vesicles† 离子液体对膜性能的改性研究：Langmuir单层和双层膜在囊泡中的应用

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-16 DOI: 10.1039/D5SM00008D

Manas Kumar Mandal, Shujiao Chen, Shuai Zhang, Qunhui Yuan and Wei Gan

{"title":"Modification of membrane properties using ionic liquids investigated with Langmuir monolayers and bilayers in vesicles†","authors":"Manas Kumar Mandal, Shujiao Chen, Shuai Zhang, Qunhui Yuan and Wei Gan","doi":"10.1039/D5SM00008D","DOIUrl":"https://doi.org/10.1039/D5SM00008D","url":null,"abstract":"Biocompatible and bioavailable ionic liquids (ILs) are generally used to modify the physicochemical properties of lipid monolayers and bilayers. Understanding the influence of ILs on lipid properties and the molecular level mechanism is crucial for applying ILs in lipid membrane modifications. Here the modification of a lipid membrane composed of 1,2-dioleoyl-sn-glycero-3-phosphoglycerol (DOPG) and cholesterol using alkyl methyl imidazolium-based ILs [Cnmim]Cl with varied alkyl chains (n = 4, 6, 8 and 10) was investigated. Langmuir monolayers were used to evaluate the influence of the ILs on the rigidity and robustness of the membranes. Then, selected compositions were used to prepare small unilamellar vesicles (SUVs) as nanocarriers. A small amphiphilic molecule (4-(4-diethylaminostyry)-1-methyl-pyridinium iodide, D289) was used as a probe to investigate the loading capability and encapsulation efficiency of the SUVs. The permeability of the lipid membrane to small molecules was also evaluated using second harmonic generation spectroscopy analysis. The different effects of the ILs with increasing chain length imposed on the membranes were compared and analyzed.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 18","pages":" 3638-3646"},"PeriodicalIF":2.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advection-dominated transport dynamics of pili and flagella-mediated motile bacteria in porous media† 多孔介质中毛和鞭毛介导的运动细菌的平流主导转运动力学研究

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-16 DOI: 10.1039/D5SM00071H

Marc Berghouse, Lazaro J. Perez, Andrew Plymale, Timothy D. Scheibe and Rishi Parashar

{"title":"Advection-dominated transport dynamics of pili and flagella-mediated motile bacteria in porous media†","authors":"Marc Berghouse, Lazaro J. Perez, Andrew Plymale, Timothy D. Scheibe and Rishi Parashar","doi":"10.1039/D5SM00071H","DOIUrl":"https://doi.org/10.1039/D5SM00071H","url":null,"abstract":"The transport of motile bacteria in porous media is highly relevant to many fields, ranging from ecology to human health. Still, critical gaps remain in our understanding of the impacts of hydrodynamics and pore structure on bacterial transport. Here, we present direct visualizations of three species of motile bacteria under variable flow rates and porosities. We find that at higher flow rates, motility is less critical to the transport of bacteria, as motion is controlled by hydrodynamic advection, making it difficult for bacteria to move across streamlines. We show that this lack of motion across streamlines results in increased velocity autocorrelation and bacterial spreading in the direction of flow. Furthermore, we find that transport of bacteria with different motility types are impacted by flow rates to different extents. At low flow rates, the transport of bacteria with pili-mediated twitching motility is strongly controlled by advection, whereas bacteria with flagella still display active motility. At higher flow rates, we show that bacteria with peritrichous flagella maintain their motility characteristics to a greater degree than bacteria with pili or monotrichous flagella. We also examine experimental net speeds of bacteria in relation to the simulated flow fields and find that the interactions between hydrodynamics, motility, and porous media geometry lead to oversampling of medium-velocity regions of a pore network by all three species. The study presents new perspectives on how different types of motile bacteria are transported and dispersed in porous media aided by strength of differentially advecting fluid.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 18","pages":" 3622-3637"},"PeriodicalIF":2.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ordered co-assembly based on chiral phenylalanine derivatives and achiral coumarin derivatives† 基于手性苯丙氨酸衍生物和非手性香豆素衍生物的有序共组装

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-15 DOI: 10.1039/D5SM00100E

Yun-song Zhou, Yang Sheng, Peng Zhang, Rong Zhang, Mark Bradley and Yi-xin Sun

{"title":"Ordered co-assembly based on chiral phenylalanine derivatives and achiral coumarin derivatives†","authors":"Yun-song Zhou, Yang Sheng, Peng Zhang, Rong Zhang, Mark Bradley and Yi-xin Sun","doi":"10.1039/D5SM00100E","DOIUrl":"https://doi.org/10.1039/D5SM00100E","url":null,"abstract":"The self-assembly of small molecules into supramolecular hydrogels is of great significance in mimicking biological systems. In this study, we investigated the formation and structure change of supramolecular hydrogels based on the self-assembly behavior of an achiral coumarin derivative (G1) and a chiral phenylalanine derivative (ALP). It was observed that G1 and ALP can self-assemble at various molar ratios, resulting in distinct nanostructured morphologies. Specifically, at a molar ratio of G1/ALP (4 : 1), the achiral G1 molecules initially bifurcate and diverge, ultimately forming a dendritic microstructure at the G1 termini. When the G1/ALP ratio was adjusted to 2 : 1, a chrysanthemum-like microstructure emerged. UV-light can destroy the self-assembled gel structure of different G1/ALP ratios, changing it from gel to sol. The emergence of these higher-order chiral structures during self-assembly was attributed to hydrogen bonding and π–π stacking interactions between the molecules. This research offers valuable insights into the understanding of biological self-assembly processes and the design of artificial biomedical materials.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 18","pages":" 3613-3621"},"PeriodicalIF":2.9,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-scale phase separation in poly(d,l-lactide-co-glycolide) and palmitic acid blends using neutron and X-ray scattering† 用中子和x射线散射法分离聚（d，l-乳酸-羟基乙酸酯）和棕榈酸共混物中的多尺度相

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-11 DOI: 10.1039/D4SM01367K

Caitlyn M. Wolf, Robert M. Dalgliesh, Liliana de Campo, Gregory N. Smith and Katie M. Weigandt

引用次数: 0

Optical coherence tomography in soft matter† 软物质的光学相干层析成像

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-10 DOI: 10.1039/D4SM01537A

Kasra Amini, Cornelius Wittig, Sofia Saoncella, Outi Tammisola, Fredrik Lundell and Shervin Bagheri

引用次数: 0

Granular flow-solid wall interaction: investigation of the teapot effect. 颗粒流-固壁相互作用：茶壶效应的研究。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-09 DOI: 10.1039/d5sm00084j

Yishan Hong, Hongyi Zou, Lijun Yang, Yitan Li, Ruo-Yu Dong

{"title":"Granular flow-solid wall interaction: investigation of the teapot effect.","authors":"Yishan Hong, Hongyi Zou, Lijun Yang, Yitan Li, Ruo-Yu Dong","doi":"10.1039/d5sm00084j","DOIUrl":"https://doi.org/10.1039/d5sm00084j","url":null,"abstract":"The evolution of granular flows generally involves solid boundaries, which add complexity to their dynamics and pose challenges to understand relevant natural and industrial phenomena. While an interesting \"teapot effect\" has been observed for liquid flowing over the solid surface of a teapot's spout, a similar phenomenon for discrete particles receives far less attention. In this work, we experimentally investigated the interactions between granular flows and a wedge-shaped solid edge (spout), showing that the trailing edge of the solid boundary plays a key role in causing velocity non-uniformity and splitting the flow into \"dispersed\" and \"uniform\" regions. Tuning the parameters (inclination angle, particle diameter, radii and surface roughness of the trailing edge) of the granular flow, a dimensionless number was summarized and successfully predicted the dispersion of the granular flows. Moreover, we also proved that introducing stronger cohesive forces between particles could harness the granular flows from heterogenous structures to grain clusters, which can be employed to switch between different flow regimes and regulate the dispersion behavior of particle flows. This study reveals the interaction of granular flow over complex solid boundaries, potentially offering new insights into particle-dominated flow dynamics.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143810399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Statistical mechanics of cell aggregates: explaining the phase transition and paradoxical piezoelectric behavior of soft biological tissues. 细胞聚集的统计力学：解释生物软组织的相变和矛盾的压电行为。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-08 DOI: 10.1039/d5sm00035a

Pratik Khandagale, Hao Lin, Liping Liu, Pradeep Sharma

{"title":"Statistical mechanics of cell aggregates: explaining the phase transition and paradoxical piezoelectric behavior of soft biological tissues.","authors":"Pratik Khandagale, Hao Lin, Liping Liu, Pradeep Sharma","doi":"10.1039/d5sm00035a","DOIUrl":"https://doi.org/10.1039/d5sm00035a","url":null,"abstract":"Piezoelectricity in biological soft tissues is a controversial issue with differing opinions. While there is compelling experimental evidence to suggest a piezoelectric-like response in tissues such as the aortic wall (among others), there are equally compelling experiments that argue against this notion. In addition, the lack of a polar structure in the underlying components of most soft biological tissues supports the latter. In this paper, we address the collective behavior of cells within a two-dimensional cell aggregate from the viewpoint of statistical mechanics. Our starting point is the simplest form of energy for cell behavior that only includes known observable facts e.g., the electrical Maxwell stress or electrostriction, resting potential across cell membranes, elasticity, and we explicitly exclude any possibility of electromechanical coupling reminiscent of piezoelectricity at the cellular level. We coarse-grain our cellular aggregate to obtain its emergent mechanical, physical, and electromechanical properties. Our findings indicate that the fluctuation of cellular strain (E) plays a similar role as the absolute temperature in a conventional atomistic-level statistical model. The coarse-grained effective free energy reveals several intriguing features of the collective behavior of cell aggregates, such as solid-fluid phase transitions and a distinct piezoelectric-like coupling, even though it is completely absent at the microscale. Closed-form formulas are obtained for key electromechanical properties, including stiffness, effective resting potential, critical E2-temperature (or fluctuation) for solid-fluid phase transitions, and apparent piezoelectric coupling in terms of fluctuation and electric potential regulated by active cellular processes.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143802023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Protein-membrane interactions with a twist. 扭曲的蛋白质-膜相互作用。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-04-08 DOI: 10.1039/d4sm01494d

Jordan Klein, Lorène Schad, Thérèse E Malliavin, Martin Michael Müller

{"title":"Protein-membrane interactions with a twist.","authors":"Jordan Klein, Lorène Schad, Thérèse E Malliavin, Martin Michael Müller","doi":"10.1039/d4sm01494d","DOIUrl":"https://doi.org/10.1039/d4sm01494d","url":null,"abstract":"Within a framework of elasticity theory and geometry, the twister mechanism has been proposed some years ago for describing the interaction between a biofilament containing a twisted hydrophobic strip and a lipid membrane: this mechanism is capable of inducing deformations of the membrane, which can lead to its opening. The present work intends to extend this model to the interactions between a membrane and protein regions conserving their folds using coarse-grained molecular dynamics simulations. The protein region is modeled as a cylinder stabilized by a tensegrity scheme, leading to an elasticity similar to that observed in real proteins. Recording molecular dynamics trajectories of this cylinder in the presence of a fluid lipid bilayer membrane allows investigation of the effect of the positions of the hydrophobic parts on the interaction with the membrane. The entire configuration space is explored by systematically varying the hydrophobic strip width, the twisting of the strip as well as the range of hydrophobic interactions between the cylinder and the membrane. Three different states are observed: no interaction between the cylinder and membrane, the cylinder in contact with the membrane surface and the cylinder inserted into the membrane with a variable tilt angle. The variations of the tilt angle are explained using a qualitative model based on the total hydrophobic moment of the cylinder. A deformation pattern of the membrane, previously predicted for the filament-membrane interaction by the twister model, is observed for the state when the cylinder is in contact with the membrane surface, which allows estimation of the applied torques.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143802019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soft Matter最新文献