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Confocal Raman spectroscopy applied to microemulsions and nanoemulsions 共聚焦拉曼光谱在微乳液和纳米乳液中的应用
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-05-24 DOI: 10.1016/j.cocis.2025.101932
Cintia J. Fernandez, Verónica Volpe, Analía Guerrero, Danielle Silva do Nascimento, Marcos Grünhut
Raman spectroscopy is a light scattering technique in which a molecule scatters incident light at different wavelengths depending on the chemical structure of the analyte, from a high-intensity laser light source. The Raman scattered light is detected to create the Raman spectrum, which is unique to the chemical compounds present in the sample, acting as chemical fingerprints. Since Raman spectrometers can be coupled to a confocal microscope, the selection of regions of interest and a high magnification of the image of the sample can be achieved. Furthermore, 2D and 3D mapping can be generated from thousands of Raman spectra acquired from different positions on the sample, showing the distribution of individual chemical components in the sample. This review summarizes recent advances in the application of confocal Raman spectroscopy to the physicochemical and analytical characterization of microemulsions and nanoemulsions, focusing primarily on topical formulations and biological studies (in-vitro and ex-vivo), and including representative in-vivo and clinical investigations. Identification, quantification, and distribution of components (surfactants, oil phase, active ingredients, etc.) in the colloidal systems, as well as to biological studies related to dynamic processes of formulations in different tissues, even in real-time, were performed. The methodological aspects of confocal Raman spectroscopy in recent works were adequately described, discussed, and compared. Also, we analyzed the limitations and advantages of the spectroscopic technique, including its contribution to green chemistry. Finally, we discuss future perspectives considering its combination with chemometric and artificial intelligence algorithms to improve the quality of the results.
拉曼光谱是一种光散射技术,其中分子散射来自高强度激光光源的不同波长的入射光,这取决于被分析物的化学结构。检测到的拉曼散射光产生了拉曼光谱,这是样品中存在的化合物所特有的,就像化学指纹一样。由于拉曼光谱仪可以耦合到共聚焦显微镜,感兴趣的区域的选择和样品的图像的高放大率可以实现。此外,从样品上不同位置获取的数千个拉曼光谱可以生成二维和三维映射,显示样品中单个化学成分的分布。本文综述了共聚焦拉曼光谱在微乳和纳米乳的理化和分析表征中的应用的最新进展,主要集中在局部配方和生物研究(体外和离体),包括有代表性的体内和临床研究。对胶体体系中的组分(表面活性剂、油相、活性成分等)进行鉴定、定量和分布,并对制剂在不同组织中的动态过程进行生物学研究,甚至进行实时研究。在最近的工作中,共聚焦拉曼光谱的方法学方面得到了充分的描述、讨论和比较。同时,分析了光谱学技术的局限性和优点,以及光谱学技术对绿色化学的贡献。最后,我们讨论了考虑其与化学计量学和人工智能算法相结合以提高结果质量的未来前景。
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引用次数: 0
Micro- and nanoplastics as transport vectors for organic contaminants in the environment: A critical review 微塑料和纳米塑料作为环境中有机污染物的运输载体:综述
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-06-06 DOI: 10.1016/j.cocis.2025.101934
Charlotte Henkel , Thorsten Hüffer , Snežana Maletić , Thilo Hofmann
The impact of micro- and nanosized plastic particles on the mobility of organic contaminants in the environment is a topic of ongoing scientific debate. Their extensive surface area and capacity to interact with organic contaminants have led to frequent concerns that micro- and nanoplastics significantly enhance their mobility and facilitate contaminant uptake by marine biota. For terrestrial systems, this hypothesis has been adopted, raising concerns that plastic particles could facilitate the transport of contaminants into deeper soil layers, thereby posing a threat to groundwater resources, especially in agricultural soils. These soils receive substantial plastic input through various sources, such as organic soil amendments, mulch, recycled wastewater, and atmospheric deposition. This review examines the molecular interactions between organic contaminants, including a wide range of non-intentionally added substances and additives, and plastic interfaces. We critically analyze the role of micro- and nanoplastics as vectors for contaminants in both marine environments and agricultural soils. Our analysis suggests that the vector effect of contaminants via micro- and nanoplastics in the marine environment is generally insignificant compared to other exposure routes. Our calculations regarding the mass transfer of common plastic additives indicate that the role of micro- and, particularly, nanoplastics as carriers for the majority of organic contaminants in agricultural soils is limited due to rapid desorption rates. Although micro- and nanoplastics do not considerably contribute to transport phenomena as vectors, it is crucial to recognize that they are significant sources of potentially harmful contaminants. These issues must be addressed in the forthcoming INC-5 plastic treaty.
微纳米塑料颗粒对环境中有机污染物迁移的影响一直是科学界争论的话题。微塑料和纳米塑料具有广泛的表面积和与有机污染物相互作用的能力,因此人们经常担心微塑料和纳米塑料会显著提高其流动性,并促进海洋生物对污染物的吸收。对于陆地系统,已经采用了这一假设,这引起了人们的关注,即塑料颗粒可能促进污染物进入更深的土层,从而对地下水资源构成威胁,特别是在农业土壤中。这些土壤通过各种来源获得大量的塑料输入,如有机土壤改良剂、地膜、回收废水和大气沉降。本文综述了有机污染物(包括各种非故意添加的物质和添加剂)与塑料界面之间的分子相互作用。我们批判性地分析了微塑料和纳米塑料作为海洋环境和农业土壤中污染物载体的作用。我们的分析表明,与其他暴露途径相比,海洋环境中通过微塑料和纳米塑料的污染物载体效应通常微不足道。我们对普通塑料添加剂的传质计算表明,由于解吸速度快,微塑料,特别是纳米塑料作为农业土壤中大多数有机污染物的载体的作用是有限的。尽管微塑料和纳米塑料作为载体对运输现象的贡献不大,但认识到它们是潜在有害污染物的重要来源是至关重要的。这些问题必须在即将举行的c -5塑料条约中加以解决。
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引用次数: 0
Recent advances in fluorine-free functionalized nanomaterials for low-wettability applications 低润湿性应用的无氟功能化纳米材料的最新进展
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-04-26 DOI: 10.1016/j.cocis.2025.101922
Donald Hill, Henry Apsey, Shirin Alexander
The reduction in wettability afforded by applying superhydrophobic coatings onto substrate materials imbues many useful properties. This review presents recent research advancements of superhydrophobic surfaces formed from functionalised nanoparticles in some of their most promising applications. Silica and metal oxide nanoparticles can be readily functionalised with commercially available hydrophobic compounds to lower their surface energy and can be easily applied to materials with complicated forms and topographies using methods such as spraying or dipping, thus making the coating process adaptable to many situations. Advances in these coatings for imbuing icephobicity, corrosion resistance, self-cleaning, oil-in-water separation, and anti-biofouling behaviour are presented in this short review.
将超疏水涂层涂在基材上所带来的润湿性降低带来了许多有用的性能。本文综述了功能化纳米颗粒形成超疏水表面的最新研究进展及其最有前途的应用。二氧化硅和金属氧化物纳米颗粒可以很容易地与商业上可用的疏水性化合物功能化,以降低其表面能,并且可以很容易地使用喷涂或浸渍等方法应用于具有复杂形状和地形的材料,从而使涂层工艺适用于许多情况。本文简要介绍了这些涂层在渗透疏冰性、耐腐蚀性、自清洁性、油水分离性和抗生物污性等方面的研究进展。
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引用次数: 0
Light-responsive emulsions and dispersions: Design and applications 光响应乳剂和分散体:设计和应用
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-06-07 DOI: 10.1016/j.cocis.2025.101935
Jack W. Avery , Beatrice E. Jones , Gregory N. Smith , Rachel C. Evans
The response of molecules to light can have a dramatic impact on the stability, morphology, and controlled release from emulsions or dispersions. In this review, we discuss the underlying mechanisms enabling light-responsive behaviour, including photoswitching, photodestruction, and photothermal effects, in surfactant- and particle-stabilised emulsions and dispersions of structured lipid nanoparticles. We critically evaluate the recent literature to demonstrate the precise control that can be achieved over a wide range of parameters, including droplet size, stability, and release. Finally, we summarise the emerging applications of these systems, identify current challenges, and suggest future research directions.
分子对光的反应会对乳液或分散体的稳定性、形态和控制释放产生巨大影响。在这篇综述中,我们讨论了在表面活性剂和颗粒稳定乳剂和结构脂质纳米颗粒分散体中实现光响应行为的潜在机制,包括光开关、光破坏和光热效应。我们批判性地评估了最近的文献,以证明可以在广泛的参数范围内实现精确控制,包括液滴大小,稳定性和释放。最后,我们总结了这些系统的新兴应用,确定了当前的挑战,并提出了未来的研究方向。
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引用次数: 0
Evaporation of emulsion drops on surfaces: A short review 表面上乳液滴的蒸发:简要回顾
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-06-20 DOI: 10.1016/j.cocis.2025.101938
Dileep Mampallil
The evaporation of drops is a ubiquitous phenomenon with implications across a wide range of applied processes. Consequently, the fundamentals of drop evaporation under various configurations and conditions have been extensively studied. One particularly interesting configuration involves the evaporation of emulsion drops, which has implications for food technology, drug delivery, and cosmetics, to name a few. This review explores the evaporation of emulsion systems placed on solid surfaces. Oil-in-water and water-in-oil emulsions exhibit distinct evaporation dynamics and offer possibilities for various applications. Here, we discuss the fundamental principles of drop evaporation in general and highlight various applications of emulsion systems. Additionally, we examine the potential opportunities that can be explored within this system.
液滴的蒸发是一种普遍存在的现象,在广泛的应用过程中具有影响。因此,人们对不同结构和条件下液滴蒸发的基本原理进行了广泛的研究。一个特别有趣的配置涉及乳剂滴的蒸发,这对食品技术、药物输送和化妆品等都有影响。这篇综述探讨了放置在固体表面的乳液系统的蒸发。水包油和油包水乳剂表现出不同的蒸发动力学,为各种应用提供了可能性。在这里,我们讨论了液滴蒸发的基本原理,并强调了乳液体系的各种应用。此外,我们还研究了在该系统中可以探索的潜在机会。
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引用次数: 0
Microfluidic production of hydrogel-shelled microcapsules and their applications 水凝胶微胶囊的微流控制备及其应用
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-06-07 DOI: 10.1016/j.cocis.2025.101936
Jiwoo Lee , Ji-Won Kim , Shin-Hyun Kim
Hydrogel shells enable precise compartmentalization of aqueous cores while regulating transmembrane molecular transport based on size- and charge-selectivity. Recent advances in droplet microfluidics have enabled the production of monodisperse multiple-emulsion droplets, which serve as ideal templates for hydrogel shell fabrication. This mini-review highlights recent progress in microfluidic emulsion templating for hydrogel shell production and explores optimal design strategies for diverse applications. Hydrogel shells are fabricated using various types of emulsions, with formation mechanisms and material selection tailored to each type. Their applications span drug and cell microcarriers, microreactors, and microsensors, where the composition, structure, and crosslinking density are precisely engineered.
水凝胶壳能够精确区隔水核,同时调节基于大小和电荷选择性的跨膜分子运输。液滴微流体的最新进展使单分散多乳液液滴的生产成为可能,这些液滴可作为水凝胶壳制造的理想模板。本文综述了用于水凝胶壳生产的微流控乳液模板的最新进展,并探讨了各种应用的最佳设计策略。水凝胶壳是由不同类型的乳液制成的,每种类型的形成机制和材料选择都是量身定制的。它们的应用跨越药物和细胞微载体、微反应器和微传感器,其中的组成、结构和交联密度是精确设计的。
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引用次数: 0
Corrigendum to “Forces at superhydrophobic and superamphiphobic surfaces” [Curr Opin Colloid Interface Sci 47 (June 2020) 46–57] “超疏水和超两疏表面的作用力”的勘误表[Curr Opin胶体界面科学47 (June 2020) 46-57]
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-05-22 DOI: 10.1016/j.cocis.2025.101923
Mimmi Eriksson , Agne Swerin
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引用次数: 0
Pickering emulsions stabilized by cellulose nanofibers obtained from agricultural and food waste 由从农业和食物垃圾中获得的纤维素纳米纤维稳定的酸洗乳
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-08-01 Epub Date: 2025-05-27 DOI: 10.1016/j.cocis.2025.101931
Noriko Kanai , Izuru Kawamura
Cellulose nanofibers (CNFs) have been extensively studied as natural stabilizers and emulsifiers for oil-in-water Pickering emulsions (PEs). While wood has been the primary source of CNFs worldwide, agricultural and food waste (AFW) is an attractive biomass source due to its fast growth and abundance. AFW-derived CNFs share structural similarities with wood-derived CNFs, with comparable emulsifying properties, and have attracted significant attention in food and cosmetics industries. Importantly, developing PEs stabilized by AFW-derived CNFs creates new research opportunities for waste valorization and upcycling into sustainable materials. This review summarizes the latest research of PEs stabilized by AFW-derived CNFs and cellulose nanocrystals.
纤维素纳米纤维作为水包油皮克林乳状液的天然稳定剂和乳化剂得到了广泛的研究。虽然木材一直是世界范围内CNFs的主要来源,但由于其快速增长和丰富,农业和食物垃圾(AFW)是一个有吸引力的生物质来源。afw衍生的CNFs与木材衍生的CNFs具有结构上的相似性,具有相似的乳化性能,并且在食品和化妆品行业引起了极大的关注。重要的是,开发由afw衍生的CNFs稳定的PEs为废物增值和升级回收为可持续材料创造了新的研究机会。本文综述了afw衍生CNFs和纤维素纳米晶体稳定聚乙烯的最新研究进展。
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引用次数: 0
Open issues in the linear and NonLinear rheology of wormlike micelles 虫状胶束的线性和非线性流变学的开放性问题
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-06-01 Epub Date: 2025-03-28 DOI: 10.1016/j.cocis.2025.101919
Rossana Pasquino , Rolando Castillo
We review experimental evidence and theoretical/modeling approaches on Wormlike Micelles (WLMs) dynamics in linear and nonlinear regimes. We focus on recent works regarding the extraction of quantitative microscopic information from linear rheology data and the possibility of quantifying the fast relaxation processes. Models for WLMs undergoing reptation and chain sequence rearrangement are discussed. Strong shear and elongational flows that can cause interesting phenomena, e.g. chain scission, structure formation, and elastic instabilities in WLMs, are considered. More specifically, start-up shear flow in the nonlinear regime, LAOS experiments, and relative data treatment are discussed, together with shear-banding phenomena and their dynamics, inertio-elastic instabilities, and secondary flow. Different techniques for measuring WLMs in extensional flow are compared, referring in particular to the recent dripping-onto-substrate (DoS) extensional rheometry, which is able to address some shortcomings of the CaBER technique. We finally deal with the potential source of triggering flow profiles and secondary flows with fluid properties and external conditions.
本文综述了线性和非线性条件下虫状胶束动力学的实验证据和理论/建模方法。我们关注的是最近关于从线性流变数据中提取定量微观信息和量化快速松弛过程的可能性的工作。讨论了WLMs复制和链序列重排的模型。强剪切和拉长流动可以引起有趣的现象,如链断裂,结构形成和弹性不稳定的wlm,被考虑。更具体地说,讨论了非线性状态下的启动剪切流,老挝实验和相关数据处理,以及剪切带现象及其动力学,惯性-弹性不稳定性和二次流。本文比较了在拉伸流动中测量wlm的不同技术,特别提到了最近的滴入-基底(DoS)拉伸流变法,该技术能够解决CaBER技术的一些缺点。最后讨论了流体性质和外部条件下触发流动剖面和二次流动的潜在来源。
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引用次数: 0
Complex fluid product microstructure imaging with light sheet fluorescence microscopy 基于薄片荧光显微镜的复杂流体产品微结构成像
IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2025-06-01 Epub Date: 2025-03-08 DOI: 10.1016/j.cocis.2025.101916
Patrick T. Spicer, Maryam Hosseini, Firoozeh Babayekhorasani
Light sheet fluorescence microscopy (LSFM), uses a thin sheet laser illumination to rapidly image samples with greatly reduced photodamage versus previous techniques. The flexibility of the technique has powered significant advances in biology research by connecting length scales from individual cells to entire developmental embryos. For similar reasons, LSFM is poised to enhance mesoscale imaging of complex fluid microstructures in fundamental and commercial systems. This work introduces the LSFM technique and reviews some of its complex fluid applications along with examples of its use in food, biomaterial, and emulsion product samples. The technique is shown to nicely complement existing complex fluid characterization methods because of its breadth of length scale resolution and its lack of photobleaching effects. New product applications for LSFM are identified and discussed, suggesting additional integration with existing techniques.
薄片荧光显微镜(LSFM)使用薄片激光照明快速成像样品,与以前的技术相比,大大减少了光损伤。该技术的灵活性通过连接单个细胞到整个发育胚胎的长度尺度,为生物学研究提供了重大进展。出于类似的原因,LSFM有望在基础和商业系统中增强复杂流体微观结构的中尺度成像。这项工作介绍了LSFM技术,并回顾了一些复杂的流体应用,以及它在食品、生物材料和乳液产品样品中的应用实例。由于该技术具有宽、长、尺度分辨率和无光漂白效应,可以很好地补充现有的复杂流体表征方法。对LSFM的新产品应用进行了识别和讨论,建议与现有技术进行额外的集成。
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引用次数: 0
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Current Opinion in Colloid & Interface Science
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