Soft Matter最新文献_第2页

Outstanding Reviewers for Soft Matter in 2024. 2024年“软物质”杰出评论家。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-21 DOI: 10.1039/d5sm90125a

引用次数: 0

Establishing physiologically relevant conditions for measuring the interfacial rheology of lung surfactants. 建立测定肺表面活性剂界面流变性的生理相关条件。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-21 DOI: 10.1039/d5sm00323g

Yun-Han Huang, John M Frostad

{"title":"Establishing physiologically relevant conditions for measuring the interfacial rheology of lung surfactants.","authors":"Yun-Han Huang, John M Frostad","doi":"10.1039/d5sm00323g","DOIUrl":"https://doi.org/10.1039/d5sm00323g","url":null,"abstract":"Lung surfactants are essential in the human respiratory system due to their role in lowering surface tension and preventing alveoli from collapsing. The main component that serves this purpose is dipalmitoylphosphatidylcholine (DPPC), a type of phospholipid that is insoluble in water. In this work, we modified an interfacial dilational rheometer (IDR) to measure the dilational modulus of DPPC at physiologically relevant temperatures and employed it at frequencies close to those relevant to breathing. Our analysis reveals that in the liquid-expanded phase, the dilational modulus is governed solely by surface pressure and is independent of temperature. This key insight is supported by the close agreement between our interfacial dilational rheometer measurements and data from other techniques. We demonstrate that the method of interface formation, compression versus direct deposition, significantly impacts the measured interfacial rheology of DPPC, underscoring the importance of deformation history in replicating physiologically relevant lung conditions. Additionally, we demonstrate the need for further work to develop improved equations of state describing DPPC behavior in the liquid-expanded phase.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144673380","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

Janssen effect in submerged granular columns. 浸没颗粒柱中的杨森效应。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-21 DOI: 10.1039/d5sm00523j

M Aguilar-González, D Maza, F Pacheco-Vázquez

{"title":"Janssen effect in submerged granular columns.","authors":"M Aguilar-González, D Maza, F Pacheco-Vázquez","doi":"10.1039/d5sm00523j","DOIUrl":"https://doi.org/10.1039/d5sm00523j","url":null,"abstract":"We experimentally study the effect of an interstitial liquid on pressure saturation in a confined granular column, specifically regarding the Janssen effect. First, we analyze the case of dry grains in a cylindrical container as a reference system. Then, the experiments are carried out in the same container filled with water, considering two scenarios: (i) when the grains are denser than water and sediment under gravity, and (ii) when the grains are less dense than water and rise to the surface due to buoyancy. In the first case, we observe a Janssen-like effect that depends on the particle density ratio to the liquid density. Stress saturation is evident when very dense particles are poured; however, this saturation nearly disappears for grains with a density similar to that of water. We describe these experimental observations using a Janssen-like approach that accounts for the hydrostatic stress introduced by the surrounding fluid. In the second scenario, a buoyancy-driven Janssen effect is found when the pressure is measured at the top of the column, and the model successfully accounts for this phenomenon. Importantly, these results demonstrate the significance of grain-to-grain stress transmission, even for granular columns suspended in a fluid.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144673381","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

Correction: Free energy modelling of a spherical nanoparticle at an oil/water interface. 修正：球形纳米粒子在油/水界面的自由能模型。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-21 DOI: 10.1039/d5sm90126j

Zhiwei Huang, Joseph L Keddie

引用次数: 0

Power-law rheology of adherent cells by local optical stretching and implications for mechanical modelling. 局部光学拉伸黏附细胞的幂律流变学及其对力学建模的影响。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-18 DOI: 10.1039/d5sm00009b

Alexander Janik, Tobias Neckernuss, Kay-E Gottschalk, Othmar Marti

{"title":"Power-law rheology of adherent cells by local optical stretching and implications for mechanical modelling.","authors":"Alexander Janik, Tobias Neckernuss, Kay-E Gottschalk, Othmar Marti","doi":"10.1039/d5sm00009b","DOIUrl":"https://doi.org/10.1039/d5sm00009b","url":null,"abstract":"The lack of quantitative agreement between different techniques and publications has been an open issue in cell rheology for many years. Major differences in experimental design - and thus potential sources of the discrepancy - include the magnitude and lateral length scale of force application. To address these issues, we have developed an optical stretcher capable of extracting viscoelastic parameters from adherent cells while applying very low forces of a few pN and deformations of a few nm in a contact-free manner. This paper outlines the potential and limitations of such a setup. The latter include the necessity of reference measurements with the cells in an index-matched medium. It is to our knowledge the first time that adherent cells have been characterized with an optical stretching setup capable of quantitative mechanical measurements. Furthermore, a meta-analysis is conducted with papers measuring the same cell lines by AFM indentation and evaluating the results with the same power-law model. The apparent stiffness values obtained vary by two orders of magnitude, but turn out to be strongly correlated with contact radius as well as applied mechanical stress. The values from optical stretching obtained at low stress and deformation fit into that picture.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657912","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

Preparation of liquid metal microrobots with an asymmetric core-shell structure for thermal gradient navigation. 非对称核壳结构热梯度导航液态金属微机器人的制备。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-17 DOI: 10.1039/d5sm00439j

Qingteng Liu, Yuan Ji, Fangzhi Mou, Jianguo Guan, Long Ren

引用次数: 0

Molecular mobility of thin films and the adsorbed layer of poly(2-vinylpyridine). 薄膜的分子迁移率和聚（2-乙烯基吡啶）吸附层。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-17 DOI: 10.1039/d5sm00539f

Marcel Gawek, Paulina Szymoniak, Deniz Hülagü, Andreas Hertwig, Andreas Schönhals

{"title":"Molecular mobility of thin films and the adsorbed layer of poly(2-vinylpyridine).","authors":"Marcel Gawek, Paulina Szymoniak, Deniz Hülagü, Andreas Hertwig, Andreas Schönhals","doi":"10.1039/d5sm00539f","DOIUrl":"https://doi.org/10.1039/d5sm00539f","url":null,"abstract":"The molecular dynamics of thin films and the adsorbed layer of poly(2-vinylpyridine) (P2VP) were investigated using broadband dielectric spectroscopy (BDS) and spectroscopic ellipsometry. Thin films of P2VP were prepared on silicon substrates and characterized to understand the influence of film thickness on the thermal glass transition temperature (Tg) and molecular mobility. The ellipsometric study revealed a decrease in Tg with decreasing film thickness, attributed to the enhanced mobility at the polymer/air interface. The adsorbed layer, prepared via the solvent leaching approach, exhibited a higher Tg compared to the bulk, indicating reduced molecular mobility due to strong polymer substrate interactions. The dielectric measurements were carried out in two different electrode configurations, crossed electrode capacitors (CEC) and nanostructured electrodes (NSE), where the latter allows for a free surface layer at the polymer/air interface. The relaxation rates of the α-relaxation measured in the CEC geometry collapse into one chart independent from the film thickness. For the thin films measured in the NSE arrangement the relaxation rates slow down with decreasing film thickness which was discussed as related to a stronger interaction of the P2VP segments with the native SiO2 at the surface of the silicon substrate compared to aluminum. It is worth noting that the effect of the enhanced mobility at the polymer/air interface is not observed in the dielectric measurements. BDS measurements in NSE geometry identified an additional relaxation process (α*-relaxation) in thin films, which was more pronounced in the adsorbed layer. This process is hypothesized to be related to molecular fluctuations within the adsorbed layer including the adsorption/desorption dynamics of segments or to a slow Arrhenius process (SAP) related to the equilibration dynamics deep in the glassy state.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144648032","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

Binary mixtures of active Brownian particles with distinct nonzero activities. 具有明显非零活度的活性布朗粒子的二元混合物。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-17 DOI: 10.1039/d4sm01290a

Nicholas J Lauersdorf, Ehssan Nazockdast, Daphne Klotsa

引用次数: 0

Materials science underpinnings of micro and nanoplastics. 微和纳米塑料的材料科学基础。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-16 DOI: 10.1039/d5sm00297d

Maninderjeet Singh, Nicholas F Mendez, Michele Valsecchi, Guruswamy Kumaraswamy, Sanat K Kumar

{"title":"Materials science underpinnings of micro and nanoplastics.","authors":"Maninderjeet Singh, Nicholas F Mendez, Michele Valsecchi, Guruswamy Kumaraswamy, Sanat K Kumar","doi":"10.1039/d5sm00297d","DOIUrl":"https://doi.org/10.1039/d5sm00297d","url":null,"abstract":"There is considerable interest in microplastics and nanoplastics (MNPL) due to their ubiquity and their potential for serious health consequences. A framework that allows us to consider all relevant aspects of MNPL requires us to enunciate (a) their formation mechanisms, their sizes, shapes, and chemical functionalities (upstream properties); and (b) their health and environmental consequences (downstream properties). In this perspective, we discuss the materials science underpinnings of MNPL formation, and the current open questions that need immediate attention from the research community. Specifically, we highlight the lack of understanding of how angstrom-level environmentally triggered bond-breaking events lead to the formation of ∼10 nm-1 mm-sized fragments. Are there universal theoretical ideas that unify MNPL formation in disparate situations? What is the role of external stressors, polymer morphology, and molecular weight? Answering these questions requires us to develop a suite of novel metrologies - from accurate, accelerated aging tests that mimic natural MNPL creation processes but speed up these rare events into the normal laboratory time scales; to the extension of standard physicochemical characterization tools which are hard to apply in the context of MNPL formation due to small sample masses.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641294","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

Poly(acrylic acid)-catalyzed supramolecular self-assembly enables free-standing low-molecular-weight hydrogels. 聚丙烯酸催化的超分子自组装使独立的低分子量水凝胶成为可能。

IF 2.9 3区化学

Soft Matter Pub Date : 2025-07-16 DOI: 10.1039/d5sm00468c

Samahir Sheikh Idris, Hucheng Wang, Yuliang Gao, Peiwen Cai, Yiming Wang, Kangkang Zhi, Shicheng Zhao

{"title":"Poly(acrylic acid)-catalyzed supramolecular self-assembly enables free-standing low-molecular-weight hydrogels.","authors":"Samahir Sheikh Idris, Hucheng Wang, Yuliang Gao, Peiwen Cai, Yiming Wang, Kangkang Zhi, Shicheng Zhao","doi":"10.1039/d5sm00468c","DOIUrl":"https://doi.org/10.1039/d5sm00468c","url":null,"abstract":"Supramolecular hydrogels self-assembled by low-molecular-weight gelators through non-covalent interactions present potent application potential in fields ranging from biomedicine to energy. However, the underwhelming mechanical properties dramatically limit real-life applications. In this contribution, we report our access to free-standing supramolecular hydrogels by triggered self-assembly of gelators using polyacrylic acid (PAA) as a catalyst. This is achieved using a hydrazone formation-induced self-assembly system, where the formation and self-assembly of hydrazone-based gelators can be dramatically accelerated under the catalysis of acid. The addition of PAA dramatically accelerates the hydrogelation process, resulting in hydrogels exhibiting well-defined networks and high stiffness. Under optimal conditions, the stiffness can even reach 37.5 kPa compared to only 2.9 kPa for the pure hydrogel. Furthermore, we find that the resultant hydrogels can stand freely and can be remolded in various shapes. Our study presents a simple approach towards strong supramolecular hydrogels that can retain their shape and size while maintaining the functionalities and stability, accelerating the applications of supramolecular hydrogels in the field of, for instance, biosensors, tissue engineering, and drug delivery.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144641295","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