Soft Matter最新文献_第10页

Water droplet attraction and coalescence on liquid-crystal-infused textured and porous surfaces 水滴在液晶注入的纹理和多孔表面上的吸引和聚并。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-25 DOI: 10.1039/D5SM01184A

Filip Ferš, Xiaoguang Wang and Uroš Tkalec

{"title":"Water droplet attraction and coalescence on liquid-crystal-infused textured and porous surfaces","authors":"Filip Ferš, Xiaoguang Wang and Uroš Tkalec","doi":"10.1039/D5SM01184A","DOIUrl":"10.1039/D5SM01184A","url":null,"abstract":"Coalescence of droplets on liquid-infused surfaces has been extensively investigated for isotropic lubricants, where interfacial and hydrodynamic responses are well described by geometry-based and mass-spring models. However, the corresponding dynamics on anisotropic lubricating films, such as liquid crystals (LCs), remain largely unexplored. In this work, we report the use of high-speed imaging to study the attraction and coalescence of millimetre-sized water droplets on two classes of substrates, covered with a thin LC overlayer: LC-infused textured surfaces (LCITS) and LC-infused porous surfaces (LCIPS). On both substrates, the droplets coalesce in three stages over approximately one minute: long-range capillary-mediated attraction, drainage of the lubricant within the wetting ridge, and final merging accompanied by in-plane oscillations of the formed droplet. On LCITS, the initial approach velocities and post-merging dynamics are broadly consistent with the geometry-based mass–spring model developed for oil-impregnated surfaces of a similar type. However, on LCIPS, where a thicker lubricating film produces a larger wetting ridge, we observe substantially reduced attraction and merging velocities, no oscillations were resolved within our temporal resolution at the first velocity peak, and drainage times strongly influenced by evaporation. In the final stage, the peak velocity mainly depends on the LC mesophase and is nearly independent of droplet size, while the oscillation period scales approximately with the square root of the droplet radius. These results clarify how the porous LC scaffold and enlarged wetting ridge alter droplet–droplet interactions and coalescence dynamics relative to textured silicone substrates.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 13","pages":" 2545-2557"},"PeriodicalIF":2.8,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/sm/d5sm01184a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147441968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Autonomous chemo-mechanical oscillations in crosslinked filamentous actin gels 交联丝状肌动蛋白凝胶中的自主化学-机械振荡。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-24 DOI: 10.1039/D5SM01205H

Ken-Ichi Sano, Ryuzo Kawamura and Yoshihito Osada

引用次数: 0

Quantifying the effects of cell death and agar density on yeast colony biofilms using an extensional-flow mathematical model 用扩展流数学模型量化细胞死亡和琼脂密度对酵母菌落生物膜的影响。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-23 DOI: 10.1039/D5SM01051A

Alexander K. Y. Tam, Daniel J. Netherwood, Jennifer M. Gardner, Jin Zhang, Campbell W. Gourlay, Vladimir Jiranek, Benjamin J. Binder and J. Edward F. Green

{"title":"Quantifying the effects of cell death and agar density on yeast colony biofilms using an extensional-flow mathematical model","authors":"Alexander K. Y. Tam, Daniel J. Netherwood, Jennifer M. Gardner, Jin Zhang, Campbell W. Gourlay, Vladimir Jiranek, Benjamin J. Binder and J. Edward F. Green","doi":"10.1039/D5SM01051A","DOIUrl":"10.1039/D5SM01051A","url":null,"abstract":"We use a combination of experiments, mathematical modelling, and parameter estimation to better understand how agar density affects colony biofilm growth of the yeast species Saccharomyces cerevisiae. We obtained 15 total experimental replicates on rectangular plates filled with 0.6%, 0.8%, 1.2%, and 2.0% agar. In the experiments, we measured the horizontal expansion over time, the number of living cells, and the colony biofilm aspect ratio. These measurements quantify the colony biofilm size, composition, and shape, respectively. We modelled colony biofilm expansion using a thin-film extensional-flow mathematical model. By fitting five unknown model parameters to mean experimental data, we show that nutrient uptake decreases and biofilm–substratum adhesion strength increases with an increase in agar density. Sensitivity analysis, fitting to individual replicates, and synthetic-data analysis confirmed that increased biofilm–substratum adhesion is the most consistent effect of increased agar density. This finding aligns with similar results reported for bacteria, and suggests that substratum properties are important for yeast colony biofilm growth.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 12","pages":" 2430-2446"},"PeriodicalIF":2.8,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388893","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

Substrate-dependent interfacial structures of ultrathin poly(methyl methacrylate) films upon annealing revealed by sum frequency generation vibrational spectroscopy 和频产生振动光谱法研究超薄聚甲基丙烯酸甲酯薄膜退火后的界面结构。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-23 DOI: 10.1039/D5SM01166C

Yiwen Chen, Bolin Li, Yunpeng Xie, Jinsheng Xu, Ningfang Wang, Hao Zhu, Pengcheng Hu, Xiaofeng Han, Zhigao Sheng and Xiaolin Lu

{"title":"Substrate-dependent interfacial structures of ultrathin poly(methyl methacrylate) films upon annealing revealed by sum frequency generation vibrational spectroscopy","authors":"Yiwen Chen, Bolin Li, Yunpeng Xie, Jinsheng Xu, Ningfang Wang, Hao Zhu, Pengcheng Hu, Xiaofeng Han, Zhigao Sheng and Xiaolin Lu","doi":"10.1039/D5SM01166C","DOIUrl":"10.1039/D5SM01166C","url":null,"abstract":"Understanding interfacial molecular structures at the polymer/adjacent materials interface is essential for optimizing the performance of energy-related devices. However, it remains insufficiently explored due to limited interface-specific techniques. Here, we employed sum frequency generation (SFG) vibrational spectroscopy to investigate the substrate-dependent interfacial structures of spin-coated ultrathin poly(methyl methacrylate) (PMMA) films (∼10 nm) on silica and CaF2 before and after thermal annealing. PMMA on silica exhibits similar OCH3-dominated SFG spectra before and after annealing. In contrast, PMMA on CaF2 shows a significant decrease in OCH3 signals and enhancements of CH2 and CH3 signals upon annealing, revealing substantial molecular reorganization at the buried PMMA/CaF2 interface. Quantitative analysis indicates that the OCH3 groups adopt a tilt angle of ∼77° (assuming a δ-distribution) after annealing, suggesting a more lying-down or disordered orientation. These substrate-dependent differences arise from weaker interfacial interactions and the hydrophobic nature of the CaF2 surface, which permits greater chain relaxation compared with the hydrogen-bond-constrained PMMA/silica interface. This study provides molecular-level and in situ insights into substrate-dependent structural evolution in polymer thin films and offers guidance for the interface engineering in photoelectric, photovoltaic, and energy-storage devices.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 12","pages":" 2422-2429"},"PeriodicalIF":2.8,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388923","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

Effects of near-field hydrodynamic interactions on bacterial dynamics near a solid surface 近场流体动力相互作用对固体表面附近细菌动力学的影响。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-23 DOI: 10.1039/D5SM01103E

Baopi Liu, Lu Chen and Haiqin Wang

{"title":"Effects of near-field hydrodynamic interactions on bacterial dynamics near a solid surface","authors":"Baopi Liu, Lu Chen and Haiqin Wang","doi":"10.1039/D5SM01103E","DOIUrl":"10.1039/D5SM01103E","url":null,"abstract":"Near-field hydrodynamic interactions between bacteria and no-slip solid surfaces are the main mechanism underlying surface entrapment of bacteria. In this study, we employ a chiral two-body model to simulate bacterial dynamics near the surface. The simulation results show that as bacteria approach the surface, their translational velocities and diffusion coefficients decrease. Under the combination of near-field hydrodynamic interactions and DLVO forces, bacteria reach a stable fixed point in the phase plane and follow circular trajectories at this point. In particular, bacteria with left-handed helical flagella exhibit clockwise circular motion on the surface. During this process, as the stable height increases, the near-field hydrodynamic interactions weaken. Consequently, the translational velocity of the bacteria parallel to the surface increases while the rotational velocity perpendicular to the surface decreases, collectively increasing the radius of curvature. Ultimately, our findings demonstrate that near-field hydrodynamic interactions significantly prolong the surface residence time of bacteria. Additionally, smaller stable heights further amplify this effect, resulting in longer residence times and enhanced surface entrapment.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 10","pages":" 2130-2138"},"PeriodicalIF":2.8,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147269307","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

Generalized model for static contact angles and hysteresis on micro/nanostructured surfaces 微纳结构表面静态接触角和滞后的广义模型。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-23 DOI: 10.1039/D5SM01268F

Carlos E. Colosqui

引用次数: 0

A flexible concentric coupled re-entrant-star composite structure with enhancing negative Poisson's ratio and mechanical strength 一种提高负泊松比和机械强度的柔性同心耦合重入星复合结构。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-23 DOI: 10.1039/D5SM01284H

Mengting Zhao, Junli Chen, Xiaojing Wen and Bingqi Tian

{"title":"A flexible concentric coupled re-entrant-star composite structure with enhancing negative Poisson's ratio and mechanical strength","authors":"Mengting Zhao, Junli Chen, Xiaojing Wen and Bingqi Tian","doi":"10.1039/D5SM01284H","DOIUrl":"10.1039/D5SM01284H","url":null,"abstract":"A flexible concentric coupled re-entrant-star (CCRS) composite structure is proposed to address the premature instability of a re-entrant honeycomb (RH) structure and the limited load-bearing capacity of a flexible star-shaped honeycomb (SH) structure. To elucidate deformation mechanisms, mechanical performance, and Poisson's ratio response, systematic comparative studies between the CCRS and conventional RH and SH were conducted, including uniaxial tension and cyclic loading. CCRS simultaneously exhibits a pronounced negative Poisson's ratio of −0.7 and markedly enhanced mechanical performance, outperforming RH by approximately 1.5 times and SH by about 3 times, while maintaining high deformability with fracture elongation exceeding 1060% and a stable cyclic recovery of about 96% even at a strain of 180%. These performance enhancements arise from an inner star-shaped unit that drives lateral expansion at low strain and an outer re-entrant hexagonal unit that provides load-bearing constraint at high strain, thereby producing more uniform stress distribution and suppressing local buckling. Consequently, CCRS offers an effective design strategy for architected soft matter systems requiring large deformation and enhanced load-bearing capacity.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 12","pages":" 2399-2407"},"PeriodicalIF":2.8,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375433","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

Modular coupling of iron nanozymes and natural enzymes in responsive microgel reactors for enhanced cascade catalysis 响应性微凝胶反应器中铁纳米酶与天然酶的模块化偶联以增强级联催化。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-20 DOI: 10.1039/D5SM01151E

Divya Gaur and Bijay P. Tripathi

{"title":"Modular coupling of iron nanozymes and natural enzymes in responsive microgel reactors for enhanced cascade catalysis","authors":"Divya Gaur and Bijay P. Tripathi","doi":"10.1039/D5SM01151E","DOIUrl":"10.1039/D5SM01151E","url":null,"abstract":"The modular integration of natural enzymes with synthetic nanozymes provides a promising strategy for creating hybrid catalytic systems with high efficiency and adaptability. However, achieving precise spatial organization and responsive control within a unified scaffold remains challenging. Herein, we report a Pickering emulsion-guided approach to fabricate responsive microgel-laden microcapsules, termed microgelsomes (MGC). Using oil–water emulsion droplets as templates, catalytic Fe3O4 nanoparticle-loaded poly(N-isopropylacrylamide-co-serine) microgels (Fe–PNSER) were assembled at the interface to form microcapsules that act as catalytic reactors. By incorporating enzymes in the aqueous core and Fe3O4 nanoparticles within the microgel membrane, self-contained chemo-enzymatic cascade reactors with tightly coupled reaction pathways were constructed. Using a glucose oxidase (GOx)/Fe–PNSER cascade as a model reaction, these multicompartment reactors showed roughly two-fold higher efficiency than homogeneous systems or simple mixtures of the same components, highlighting the advantage of spatially organized hybrid catalysis. The system also offers tunable properties, robustness, and compatibility for integrating diverse catalytic functions. This work provides a versatile and scalable platform for designing next-generation hybrid reactors with combined structural precision and functional synergy.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 12","pages":" 2364-2378"},"PeriodicalIF":2.8,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147429494","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

Ice–rubber friction mechanisms across scales 冰-橡胶跨尺度摩擦机制。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-20 DOI: 10.1039/D5SM01200G

Anderson Dalavale Kaiser Pinto, Denis Mazuyer and Juliette Cayer-Barrioz

{"title":"Ice–rubber friction mechanisms across scales","authors":"Anderson Dalavale Kaiser Pinto, Denis Mazuyer and Juliette Cayer-Barrioz","doi":"10.1039/D5SM01200G","DOIUrl":"10.1039/D5SM01200G","url":null,"abstract":"Rubber–ice friction is governed by the coupled contributions of viscoelastic adhesion and interfacial heating. This work provides unique in situ/in operando insight into the friction mechanisms from the macroscopic to the molecular scale using combined experimental measurements and analytical modelling approaches. Simultaneous force and real contact area imaging were used to quantify the real shear stress of SBR–silica elastomers spanning a small-strain, low-frequency shear-modulus range of 1–8 MPa (a low glass transition temperature of ∼−60 °C) during pure sliding over 50 µm s−1–1 m s−1 and at environmental temperatures down to −30 °C. The normalized real contact area exhibited a non-monotonic velocity dependence; together with a bell-shaped shear stress–velocity curve, this revealed three friction regimes: at low velocity, adhesion and viscoelastic dissipation dominated thermal effects; near the peak, frictional heat generation increased; and at high velocity, thermally driven mechanisms, including advection-dominated heat removal, became more significant, with the possible occurrence of localized interfacial melting. No bulk melting was observed. The novelty of this work relies on bridging the scales in ice–rubber friction mechanisms. At the macroscopic scale, a simple thermal analysis of the rubber–ice sliding interface yielded a dimensionless average contact temperature that collapsed across all compounds and test conditions considered. At the molecular scale, Chernyak–Leonov kinetics was used to describe elastomer chain attachment–detachment on ice and its temperature dependence. Successfully confronting our experimental results with this multiscale model led to a predictive interfacial shear stress model that, when supplied with the measured real contact area, reproduced both the magnitude and shape of the friction response.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 13","pages":" 2514-2525"},"PeriodicalIF":2.8,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147466191","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

Liquid crystalline derivatives exhibiting smectic phases with ferro- and antiferro-electric properties 具有铁电性和反铁电性的近晶相液晶衍生物。

IF 2.8 3区化学

Soft Matter Pub Date : 2026-02-20 DOI: 10.1039/D6SM00028B

Natalia Podoliak, Vladimíra Novotná, Terézia Jurkovičová, Věra Hamplová, Damian Pociecha and Martin Cigl

{"title":"Liquid crystalline derivatives exhibiting smectic phases with ferro- and antiferro-electric properties","authors":"Natalia Podoliak, Vladimíra Novotná, Terézia Jurkovičová, Věra Hamplová, Damian Pociecha and Martin Cigl","doi":"10.1039/D6SM00028B","DOIUrl":"10.1039/D6SM00028B","url":null,"abstract":"Chiral liquid crystalline molecules can self-assemble and generate ferroelectricity (FE) or antiferroelectricity (AF) in tilted lamellar smectic C phases. In previous studies, lactic acid has been repeatedly employed as an effective source of chirality. In this study, we synthesized several mesogens with the aim to establish the role of chiral chains and reveal their influence on the mesogenic and polar properties. For the first studied mesogen, we utilized a methylbutyl group in the chiral chain. The second mesogen differed from the first one in incorporated (S)-lactate group added to prolong the chain terminated with a methylbutyl. In the third homologue, two (S)-lactates and one methylbutyl group form the chiral chain. To establish their optical purity by high-performance liquid chromatography (HPLC), additional derivatives were prepared with a racemic methylbutyl chain. We compared all the homologues with respect to the effect of the chiral chain modification. Among them, the third derivative with two lactates in its chiral chain exhibited an AF smectic phase, which was stable and enantiotropic in a broad temperature range, including the room temperature, which could be attractive for various applications.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 12","pages":" 2389-2398"},"PeriodicalIF":2.8,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/sm/d6sm00028b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147363471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0