Soft Matter最新文献_第6页

Investigation of microgel monolayers with the colloidal probe technique: how concentration and temperature allow tuning the properties of a microgel coating† 用胶体探针技术研究微凝胶单层：浓度和温度如何调节微凝胶涂层的性质。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-09 DOI: 10.1039/D5SM00237K

Timon Kratzenberg, Simon Schog, Steffen Bochenek, M. Friederike Schulte and Walter Richtering

{"title":"Investigation of microgel monolayers with the colloidal probe technique: how concentration and temperature allow tuning the properties of a microgel coating†","authors":"Timon Kratzenberg, Simon Schog, Steffen Bochenek, M. Friederike Schulte and Walter Richtering","doi":"10.1039/D5SM00237K","DOIUrl":"10.1039/D5SM00237K","url":null,"abstract":"Microgels are soft nanometer-sized polymer systems that show high potential as responsive functional coatings. Here, we report colloidal probe measurements with a silica particle and thermo-responsive PNIPAM-co-APMH microgels adsorbed to a solid substrate immersed in water at different surface concentrations and at different temperatures. We show that the increase in the microgel concentration allows for a higher deformation leading to an effective softer microgel monolayer. We attribute this to a lower lateral expansion of the microgel on the substrate leading to a higher protrusion of the soft microgel corona into the water phase. Further, it is shown that even a small number of charged functional groups significantly impacts the properties of the microgel coating. As the microgels collapse, the viscoelastic properties of the network change and the microgels become stiffer. Additionally, the surface charge density increases. Thus, adjusting the concentration of the microgels at the interface as well as the temperature allows controlling the viscoelastic properties of the monolayer as well as the steric and electrostatic interactions perpendicular to the interface.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 26","pages":" 5255-5267"},"PeriodicalIF":2.9,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/sm/d5sm00237k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245325","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

Free energy modelling of a spherical nanoparticle at an oil/water interface 球形纳米颗粒在油/水界面上的自由能模型。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-09 DOI: 10.1039/D5SM00501A

Zhiwei Huang and Joseph L. Keddie

引用次数: 0

Continuum mechanics of differential growth in disordered granular matter 无序颗粒中差异生长的连续介质力学。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-06 DOI: 10.1039/D4SM01429D

Noemie S. Livne, Tuhin Samanta, Amit Schiller, Itamar Procaccia and Michael Moshe

{"title":"Continuum mechanics of differential growth in disordered granular matter","authors":"Noemie S. Livne, Tuhin Samanta, Amit Schiller, Itamar Procaccia and Michael Moshe","doi":"10.1039/D4SM01429D","DOIUrl":"10.1039/D4SM01429D","url":null,"abstract":"Disordered granular matter exhibits mechanical responses that occupy the boundary between fluids and solids, lacking a complete description within a continuum theoretical framework. Recent studies have shown that, in the quasi-static limit, the mechanical response of disordered solids to external perturbations is anomalous and can be accurately predicted by the theory of “odd dipole screening.” In this work, we investigate responsive granular matter, where grains change size in response to stimuli such as humidity, temperature, or other factors. We develop a geometric theory of odd dipole-screening, incorporating the growth field into the equilibrium equation. Our theory predicts an anomalous displacement field in response to non-uniform growth fields, confirmed by molecular dynamics simulations of granular matter. Although the screening parameters in our theory are phenomenological and not derived from microscopic physics, we identify a surprising relationship between the odd parameter and Poisson's ratio. This theory has implications for various experimental protocols, including non-uniform heating or wetting, which lead to spatially varying expansion fields.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 25","pages":" 5153-5161"},"PeriodicalIF":2.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/sm/d4sm01429d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144232719","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

Poly-2-isopropyl-2-oxazoline: conformational characteristics, LCST behavior and complexation with curcumin† 聚2-异丙基-2-恶唑啉：构象特征、LCST行为及与姜黄素的络合作用。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-06 DOI: 10.1039/D5SM00337G

T. Yu. Kirila, N. D. Kozina, M. A. Golovina, M. P. Sokolova, A. V. Tenkovtsev and A. P. Filippov

{"title":"Poly-2-isopropyl-2-oxazoline: conformational characteristics, LCST behavior and complexation with curcumin†","authors":"T. Yu. Kirila, N. D. Kozina, M. A. Golovina, M. P. Sokolova, A. V. Tenkovtsev and A. P. Filippov","doi":"10.1039/D5SM00337G","DOIUrl":"10.1039/D5SM00337G","url":null,"abstract":"A homologous series of thermoresponsive poly-2-isopropyl-2-oxazolines were synthesized using living cationic ring-opening polymerization. The molar mass and hydrodynamic characteristics of poly-2-isopropyl-2-oxazolines were determined using methods of molecular hydrodynamics and optics in dilute ethanol solutions. The molar masses of the samples varied almost tenfold (2600–22 100 g mol−1). For poly-2-isopropyl-2-oxazolines, the exponents in the Kuhn–Mark–Houwink–Sakurada equations for intrinsic viscosity (0.54) and translational friction coefficient (0.53) were typical for flexible-chain polymers. The equilibrium rigidity of poly-2-isopropyl-2-oxazolines (Kuhn segment length was 2.0 nm) was determined by analyzing the hydrodynamic characteristics using theories that take into account volume effects in thermodynamically good solvents. It was shown that the rigidity of poly-2-alkyl-2-oxazolines increases with the growth of the size of the side radical, even when the carbon atom number in the latter is not large. In aqueous solutions, poly-2-isopropyl-2-oxazolines exhibited LCST behavior. Phase separation temperature and LCST decreased with increasing molar mass due to the growth of polymer hydrophobicity. The highly efficient binding of curcumin by poly-2-isopropyl-2-oxazoline in aqueous solutions was observed. Stable complexes of poly-2-isopropyl-2-oxazolines with curcumin were formed in water. Solutions of complexes were thermoresponsive, and the addition of curcumin did not change the phase separation temperature since the curcumin content was very low.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 25","pages":" 5117-5127"},"PeriodicalIF":2.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144232720","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

Pronounced effect of strain biaxiality on high-temperature behavior of strain-crystallizing elastomers† 应变双轴性对应变结晶弹性体高温行为的显著影响。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-05 DOI: 10.1039/D5SM00341E

Ryosuke Osumi, Thanh-Tam Mai, Katsuhiko Tsunoda and Kenji Urayama

{"title":"Pronounced effect of strain biaxiality on high-temperature behavior of strain-crystallizing elastomers†","authors":"Ryosuke Osumi, Thanh-Tam Mai, Katsuhiko Tsunoda and Kenji Urayama","doi":"10.1039/D5SM00341E","DOIUrl":"10.1039/D5SM00341E","url":null,"abstract":"We investigate the impact of strain biaxiality on strain induced crystallization (SIC) at elevated temperatures in natural rubber (NR) and synthetic isoprene rubber (IR). By comparing uniaxial (U) and pseudo-planar (P) stretching under different lateral contraction conditions, we find that the upper-limit ambient temperature for SIC-induced reinforcement in the P-geometry is more than 20 °C lower than in the U-geometry. Similarly, the melting temperature of SIC crystallites in the P-geometry is reduced by over 30 °C compared to the U-geometry. These findings demonstrate that finite lateral stretch significantly suppresses both the onset temperature and thermal stability of SIC-induced reinforcement. Our results reveal that strain biaxiality plays a pivotal role in SIC not only at room temperature, as previously recognized, but also under high temperature conditions. These strain biaxiality effects are more pronounced in IR than in NR. Furthermore, elevated-temperature fracture experiments reveal a non-linear crack propagation pattern in the P-geometry: local deformation transitions from planar to pseudo-uniaxial toward the specimen edge, where higher crystallinity forms a barrier. Cracks bifurcate to circumvent these regions, highlighting the critical role of spatial SIC heterogeneity in fracture resistance. Our results offer valuable insights into SIC mechanisms and contribute to the development of SIC-rubber materials with enhanced durability under complex deformation and high-temperature conditions.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 25","pages":" 5080-5088"},"PeriodicalIF":2.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144223786","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

Generating forces in confinement via polymerization† 在约束条件下通过聚合产生力。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-04 DOI: 10.1039/D4SM01339E

Dino Osmanović and Elisa Franco

{"title":"Generating forces in confinement via polymerization†","authors":"Dino Osmanović and Elisa Franco","doi":"10.1039/D4SM01339E","DOIUrl":"10.1039/D4SM01339E","url":null,"abstract":"Understanding how to produce forces using biomolecular building blocks is essential for the development of adaptive synthetic cells and living materials. Here we ask whether a dynamic polymer system can generate deformation forces in soft shells by pure self-assembly, motivated by the fact that biological polymer networks like the cytoskeleton can exert forces, move objects, and deform membranes by simply growing, even in the absence of molecular motors. We address this question by investigating polymer force generation by varying the release rate, the structure, and the interactions of self-assembling monomers. First, we develop a toy computational model of polymerization in a soft elastic shell that reveals the emergence of spontaneous bundling which enhances shell deformation. We then extend our model to account more explicitly for monomer binding dynamics. We find that the rate at which monomers are released into the interior of the shell is a crucial parameter for achieving deformation through polymer growth. Finally, we demonstrate that the introduction of multivalent particles that can join polymers can either improve or impede polymer performance, depending on the amount and on the structure of the multivalent particles. Our results provide guidance for the experimental realization of polymer systems that can perform work at the nanoscale, for example through rationally designed self-assembling proteins or nucleic acids.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 26","pages":" 5312-5322"},"PeriodicalIF":2.9,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245324","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

Dynamics and rupture of doped motility induced phase separation. 掺杂运动诱导相分离的动力学和断裂。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-04 DOI: 10.1039/d5sm00134j

Rodrigo Fernández-Quevedo García, Enrique Chacón, Pedro Tarazona, Chantal Valeriani

引用次数: 0

Directed self-organization of block copolymer micelles on topographic substrates† 嵌段共聚物胶束在地形基板上的定向自组织。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-03 DOI: 10.1039/D5SM00152H

Riham Muzaffar-Kawasma, Elisheva Michman, Meirav Oded and Roy Shenhar

{"title":"Directed self-organization of block copolymer micelles on topographic substrates†","authors":"Riham Muzaffar-Kawasma, Elisheva Michman, Meirav Oded and Roy Shenhar","doi":"10.1039/D5SM00152H","DOIUrl":"10.1039/D5SM00152H","url":null,"abstract":"The ability to create complex arrays of organized nanostructures is crucial for many advanced technological applications. An extensively investigated methodology for producing such arrays is the directed self-assembly of block copolymers using topographically patterned substrates, where micron-scale features engraved in the substrate induce nanodomain alignment over macroscopic ranges. Most research thus far concentrated on the formation of ordered surface patterns through microphase separation of block copolymers in thin films. In this work, we demonstrate the utility of block copolymer micelles – soft, self-assembled, non-crosslinked entities – for the preparation of arrays with structural bi-modality. Systematic investigation of the influence of the substrate's topography on the micellar assembly at different concentrations revealed different structural behavior of micelles deposited on the plateaus and in the trenches, which is tunable by the topographic feature dimensions. The potential of this approach for effecting complex superstructures is demonstrated by employing the micelles to organize semiconductor nanorods.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 24","pages":" 4935-4944"},"PeriodicalIF":2.9,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/sm/d5sm00152h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207239","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

Microrheology of gel-forming airway mucins isolated from porcine trachea† 猪气管凝胶型气道粘蛋白的微流变学研究。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-03 DOI: 10.1039/D4SM01343C

Elizabeth M. Engle, Sydney Yang, Allison Boboltz, Sahana Kumar, Alexa Stern and Gregg A. Duncan

{"title":"Microrheology of gel-forming airway mucins isolated from porcine trachea†","authors":"Elizabeth M. Engle, Sydney Yang, Allison Boboltz, Sahana Kumar, Alexa Stern and Gregg A. Duncan","doi":"10.1039/D4SM01343C","DOIUrl":"10.1039/D4SM01343C","url":null,"abstract":"Mucus produced in the lungs has important protective barrier functions that strongly depend on its biomolecular composition, biopolymer network architecture, and viscoelastic properties. However, to date, there has yet to be a readily available source of reconstituted, gel-forming mucins from the lungs to model and study its biophysical properties. To address this, we established an in-house procedure to extract airway mucins from pig trachea with minimal DNA contamination consisting of ∼70% by weight protein. Particle tracking microrheology was used to evaluate the biophysical properties of porcine trachea mucins for comparison to other reconstituted mucin and native mucus gels. At an ionic strength and pH reflective of conditions in the lungs, we found that porcine tracheal mucins formed a tighter mesh network and possessed a significantly greater microviscosity compared to mucins extracted from the porcine small intestine. In comparison to mucus harvested from human airway tissue cultures, we found that porcine tracheal mucins also possessed a greater microviscosity, suggesting that these mucins can form into a gel at physiological total solid concentrations.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 25","pages":" 4999-5004"},"PeriodicalIF":2.9,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12152714/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264903","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

Morphology prediction for polymer blend thin films using machine learning† 基于机器学习的聚合物共混薄膜形态预测。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-06-03 DOI: 10.1039/D5SM00335K

Bishnu R., Rabibrata Mukherjee, Nandini Bhandaru and Arnab Dutta

{"title":"Morphology prediction for polymer blend thin films using machine learning†","authors":"Bishnu R., Rabibrata Mukherjee, Nandini Bhandaru and Arnab Dutta","doi":"10.1039/D5SM00335K","DOIUrl":"10.1039/D5SM00335K","url":null,"abstract":"When two immiscible polymers are spin-coated from a common solvent, they undergo phase separation, resulting in a mesoscale morphology that depends on a host of parameters. The phase-separated morphology plays a pivotal role in determining the potential applications of blend thin films. As a guide to experimentalists, a machine learning-based classification framework is proposed that can predict the morphology of PS/PMMA blend thin films. Different experimental parameters like weight fraction of PS, molecular weight of PMMA, concentration, and substrate surface energy were used as inputs based on which the morphology type, i.e., column, hole, or island, was predicted using a multi-class classification model. Several machine learning algorithms were used to develop the proposed classifier. Support vector machine (SVM) algorithm resulted in the highest accuracy of 93.75%. An explainable machine learning algorithm was also implemented to extract valuable insights from the proposed SVM model. These insights were found to be in excellent agreement with experimental observations, thus not only enhancing the reliability of the predictive model but also the understanding of phase separation in PS/PMMA blends. Based on these insights, several guidelines are recommended to further aid in the experimental design of specific morphologies. An easy-to-use web tool is also developed so that the proposed model can be accessed freely, which is expected to expedite the design of application-specific thin films.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 26","pages":" 5284-5295"},"PeriodicalIF":2.9,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/sm/d5sm00335k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245327","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