Soft Matter最新文献_第9页

Dynamics of switching processes: general results and applications in intermittent active motion 切换过程的动力学：间歇性主动运动的一般结果和应用。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-06 DOI: 10.1039/D4SM01054J

Ion Santra, Kristian Stølevik Olsen and Deepak Gupta

引用次数: 0

Co-assembly of cellulose nanocrystals and gold nanorods: insights from molecular dynamics modelling† 纤维素纳米晶体与金纳米棒的共组装：分子动力学建模的启示。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-06 DOI: 10.1039/D4SM00871E

Jiaxin Hou, William Sampson and Ahu Gümrah Dumanli

引用次数: 0

Thin free-standing liquid films manipulation: device design to turn on/off gravity in flow regimes for thickness map control and for material structuring. 操纵独立的薄液膜：在流动状态下开启/关闭重力的装置设计，以控制厚度图和材料结构。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-06 DOI: 10.1039/d4sm00951g

Paolo Iaccarino, Zhe Wang, Andrea Marfuggi, Simone Russo, Vincenzo Ferraro, Giuseppe Vitiello, Sara Coppola, Ernesto Di Maio

{"title":"Thin free-standing liquid films manipulation: device design to turn on/off gravity in flow regimes for thickness map control and for material structuring.","authors":"Paolo Iaccarino, Zhe Wang, Andrea Marfuggi, Simone Russo, Vincenzo Ferraro, Giuseppe Vitiello, Sara Coppola, Ernesto Di Maio","doi":"10.1039/d4sm00951g","DOIUrl":"10.1039/d4sm00951g","url":null,"abstract":"The manipulation and control of free-standing liquid film drainage dynamics is of paramount importance in many technological fields and related products, ranging from liquid lenses to liquid foams and 2D structures. In this context, we theoretically design and introduce a device where we can reversibly drive flow regime switch between viscous-capillary and viscous-gravity in a thin free-standing liquid film by altering its shape, allowing us to manipulate and stabilize the film thickness over time. The device, which mainly consists of a syringe pump, a pressure transducer, and a 3D-printed cylinder, is coupled with a digital holography setup to measure, in real time, the evolution of the local film thickness map, revealing characteristic features of viscous-capillary and viscous-gravity driven drainage regimes. By using polyvinyl alcohol/water concentrated solutions, we are also able to produce viscoelastic membranes after manipulation and water evaporation, which presents manipulation history-dependent geometrical properties. Furthermore, using a system composed of carboxymethyl cellulose, water, and rod-like zinc oxide nanoparticles, we show a clear effect of film manipulation on particle rearrangement. We believe this device could represent a starting point for the development of a useful and practical tool to study thin liquid film dynamics and to produce novel (patterned) 2D structures for the numerous scientific and technical fields where they are of use.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581335","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

Self-consistent electrostatic formalism of bulk electrolytes based on the asymmetric treatment of the short- and long-range ion interactions† 基于短程和长程离子相互作用的非对称处理的体电解质自洽静电形式主义。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-06 DOI: 10.1039/D4SM01174K

Sahin Buyukdagli

{"title":"Self-consistent electrostatic formalism of bulk electrolytes based on the asymmetric treatment of the short- and long-range ion interactions†","authors":"Sahin Buyukdagli","doi":"10.1039/D4SM01174K","DOIUrl":"10.1039/D4SM01174K","url":null,"abstract":"We predict the thermodynamic behavior of bulk electrolytes from an ionic hard-core (HC) size-augmented self-consistent formalism incorporating asymmetrically the short- and long-range ion interactions via their virial and cumulant treatment, respectively. The characteristic splitting length separating these two ranges is obtained from a variational equation solved together with the Schwinger–Dyson (SD) equations. Via comparison with simulation results from the literature, we show that the asymmetric treatment of the distinct interaction ranges significantly extends the validity regime of our previously developed purely cumulant-level Debye–Hückel (DH) theory. Namely, for monovalent solutions with typical ion sizes, the present formalism can accurately predict up to molar concentrations the liquid pressure dominated by HC interactions, the internal energies driven by charge correlations, and the local ion distributions governed by the competition between HC and electrostatic interactions. We evaluate as well the screening length of the liquid and investigate the deviations of the macromolecular interaction range from the DH length. In fair agreement with simulations and experiments, our theory is shown to reproduce the overscreening and underscreening effects occurring respectively in submolar mono- and multivalent electrolytes.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 45","pages":" 9104-9116"},"PeriodicalIF":2.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142612856","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

Hydrogel-based 3D fabrication of multiple replicas with varying sizes and materials from a single template via iterative shrinking† 基于水凝胶的三维制造技术，通过迭代收缩，从单一模板中制造出多个不同尺寸和材料的复制品。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-06 DOI: 10.1039/D4SM00835A

Eunseok Heo, Hye Been Koo, Jun Chang Yang, In Cho, Hyun-Hee Lee, Yong-Jin Yoon, Steve Park and Jae-Byum Chang

{"title":"Hydrogel-based 3D fabrication of multiple replicas with varying sizes and materials from a single template via iterative shrinking†","authors":"Eunseok Heo, Hye Been Koo, Jun Chang Yang, In Cho, Hyun-Hee Lee, Yong-Jin Yoon, Steve Park and Jae-Byum Chang","doi":"10.1039/D4SM00835A","DOIUrl":"10.1039/D4SM00835A","url":null,"abstract":"3D printing technologies have been widely used for the rapid prototyping of 3D structures, but their application in a broader context has been hampered by their low printing throughput. For the same structures to be produced in a variety of sizes and materials, each must be printed separately, which increases time and cost. Replicating 3D-printed structures in a variety of sizes using a molding process with size-tunable molds could be a solution, but it has only been applied to simple structures, such as those with tapered or vertical profiles. This work demonstrates the generation of multiple replicas of varying sizes and materials from a single 3D-printed template with complex geometries by using molds made of stretchable hydrogel that shrink isotropically. We optimize hydrogel compositions to synthesize a hydrogel that is highly stretchable and shrinks isotropically in all directions. The high stretchability of this hydrogel allows for the removal of complex 3D-printed templates from hydrogel molds. The cavities of the hydrogel molds are then filled with polycaprolactone (PCL) and dried at 80 °C. As the hydrogel shrinks due to drying, the melted PCL fragments completely fill the cavities. The entire process can be repeated to produce multiple replicas in a variety of sizes and materials. Replicas that are one-tenth of the size of the original printed template can be produced. Finally, we demonstrate how our method can be used to reduce the size of interconnected geometries, which would be impossible to achieve using traditional molding processes.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 46","pages":" 9249-9260"},"PeriodicalIF":2.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142612844","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

Light scattering study of algal floc growth and structure: alum vs. polymeric plant-derived flocculant. 藻类絮体生长和结构的光散射研究：明矾与植物衍生聚合物絮凝剂。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-06 DOI: 10.1039/d4sm00837e

Temitope Orimolade, Ngoc-Tram Le, Lyle Trimble, Bandaru Ramarao, Sitaraman Krishnan

{"title":"Light scattering study of algal floc growth and structure: alum vs. polymeric plant-derived flocculant.","authors":"Temitope Orimolade, Ngoc-Tram Le, Lyle Trimble, Bandaru Ramarao, Sitaraman Krishnan","doi":"10.1039/d4sm00837e","DOIUrl":"10.1039/d4sm00837e","url":null,"abstract":"The flocculation dynamics of Microcystis aeruginosa algal cultures using alum and aqueous Moringa oleifera seed extracts as flocculants were analyzed through light scattering and fractal analysis. Floc growth in continuously stirred M. aeruginosa suspensions, with cell densities ranging from 200 to 800 μg L-1 chlorophyll a (Chl a), exhibited distinct patterns in fractal dimension (dF) evolution relative to floc size: a smooth, monotonic increase; stochastic increase; and stabilization or leveling off. dF values ranged from 1.3 to 2.6, with floc diameters (D4,3 volume-weighted mean) spanning 30 to 300 μm. Alum (0.1 to 0.4 g L-1) induced fast diffusion-limited flocculation, initially producing lower dF values, which progressively increased due to structural rearrangement at a slower rate. In contrast, at sufficiently high concentrations (0.1 to 0.2 g L-1 BSA equivalent), M. oleifera seed proteins facilitated stable, high dF ≈ 2.0 early on, evidently through patch charge interactions. Flocs formed with alum were prone to shear-induced breakage, limiting both their size and stability, whereas M. oleifera extract produced larger, more stable flocs with greater resilience to shear due to robust particle network formation by the polymer. Both flocculants effectively treated 800 μg L-1 Chl a M. aeruginosa suspensions, but M. oleifera extract demonstrated better performance in terms of floc size at similar mass concentrations. These findings highlight the potential of Moringa seed extract as a sustainable and effective alternative to conventional flocculants like alum, offering insights into their mechanisms and performance in flocculation processes.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581332","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

Fibrotaxis: gradient-free, spontaneous and controllable droplet motion on soft solids† Fibrotaxis：软固体上的无梯度、自发和可控液滴运动。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-06 DOI: 10.1039/D4SM01022A

Sthavishtha R. Bhopalam, Jesus Bueno and Hector Gomez

引用次数: 0

Pairing-specific microstructure in depletion gels of bidisperse colloids 双分散胶体耗尽凝胶中的配对特异性微结构。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-05 DOI: 10.1039/D4SM00811A

Rony A. Waheibi and Lilian C. Hsiao

{"title":"Pairing-specific microstructure in depletion gels of bidisperse colloids","authors":"Rony A. Waheibi and Lilian C. Hsiao","doi":"10.1039/D4SM00811A","DOIUrl":"10.1039/D4SM00811A","url":null,"abstract":"We report the ensemble-averaged and pairing-specific network microstructure formed by short-range depletion attractions in hard sphere-like colloidal systems. Gelation is induced by adding polystyrene molecules at a fixed concentration to colloids with different colloid bidispersity ratios (α = 1, 0.72, and 0.60) across a range of volume fractions (0.10 ≤ ϕ ≤ 0.40). 3D confocal microscopy imaging combined with a scale-invariant feature transform algorithm show that monodisperse colloids pack more efficiently, whereas increasing the size disparity leads to looser, more disordered, and sub-isostatic packings. Categorizing the structures formed by small and large particles reveal that certain cluster configurations may be favored due to the complex interplay between the differences in particle surface areas and attractive potentials. These pairwise bonds assemble to affect the density of tetrahedral and poly-tetrahedral clusters in bidisperse systems. With the exception of non-percolating samples at ϕ = 0.10, increasing the gel volume fraction leads to an increase in the number of nearest neighbors. However, the internal density within each cluster decreases, possibly due to kinetic arrest from the deeper potential wells of tetrahedral clusters at low volume fractions in which vertices are primarily made out of larger particles.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" 45","pages":" 9083-9094"},"PeriodicalIF":2.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/sm/d4sm00811a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142612850","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

Active nematic coherence probed under spatial patterns of distributed activity† 在分布式活动的空间模式下探测主动神经相干性。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-05 DOI: 10.1039/D4SM00651H

Ignasi Vélez-Cerón, Jordi Ignés-Mullol and Francesc Sagués

引用次数: 0

Shape memory and recovery mechanism in hard magnetic soft materials† 硬磁软材料的形状记忆和恢复机制

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-05 DOI: 10.1039/D4SM01165A

Rong Jia, Kai Tan and Qian Deng

引用次数: 0