Current Opinion in Colloid & Interface Science最新文献

英文中文

Protorheology in practice: Avoiding misinterpretation 实践中的原流变学：避免误读

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-21 DOI: 10.1016/j.cocis.2024.101866

Protorheology is the paradigm that any observed flow or deformation is a chance to infer quantitative rheological properties. While this creates many opportunities for insight, there is significant risk of misunderstanding the physics involved, e.g. misinterpreting a liquid as a solid or mistaking viscous flow time as viscoelastic relaxation time. We describe these and other potential mistakes, use case studies to show how serious the problems can be, and contrast misinterpretations with correct approaches and interpretations. Some issues are especially important with materials involving colloidal particles and flows involving surface tension. Whether the reader is making inference from a tilted vial, time-lapse gravity-driven flow, a bounce test, die swell, or any other protorheology observation, the examples here serve as a guide for avoiding bad data in protorheology.

原流变学认为，任何观察到的流动或变形都是推断定量流变特性的机会。虽然这为深入了解流变学提供了很多机会，但也存在误解相关物理学原理的重大风险，例如将液体误解为固体，或将粘性流动时间误解为粘弹性弛豫时间。我们将介绍这些及其他可能出现的错误，通过案例研究来说明问题的严重性，并将错误的解释与正确的方法和解释进行对比。有些问题对于涉及胶体粒子的材料和涉及表面张力的流动尤为重要。无论读者是从倾斜的样品瓶、延时重力驱动流动、反弹试验、模具膨胀还是任何其他原流变学观察结果进行推断，这里的例子都可以作为避免原流变学中错误数据的指南。

引用次数: 0

A critical examination of the physics behind the formation of particle-laden fluid interfaces 对形成含有颗粒的流体界面背后的物理学原理进行批判性研究

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-21 DOI: 10.1016/j.cocis.2024.101868

Particle trapping is a powerful tool for tailoring fluid interfaces, offering unprecedented control over interfacial properties and behaviors. In this review, we delve into the intricate mechanisms driving the trapping of particles at the fluid interface. By strategically manipulating particles at fluid interfaces, researchers have unlocked a myriad of opportunities for engineering interfacial phenomena with precision and versatility. In fact, particle trapping strategies enable tailored modifications of fluid interfaces that span a wide range of length scales and material systems. This work explores the underlying principles governing particle–surface interactions, highlighting key factors such as particle size, shape, surface chemistry, and interfacial tension. Through a comprehensive examination of recent developments, this review provides valuable insights into the transformative potential of particle trapping for shaping fluid interfaces, paving the way for innovative applications across various disciplines, including materials science, biotechnology, and environmental engineering.

颗粒捕集是定制流体界面的有力工具，可对界面特性和行为进行前所未有的控制。在这篇综述中，我们将深入探讨驱动流体界面颗粒捕集的复杂机制。通过战略性地操纵流体界面上的颗粒，研究人员为精确而多变地设计界面现象提供了无数机会。事实上，粒子捕集策略可以对流体界面进行量身定制的改造，其范围涵盖了各种长度尺度和材料系统。本研究探讨了颗粒与表面相互作用的基本原理，突出了颗粒大小、形状、表面化学和界面张力等关键因素。通过对最新进展的全面考察，这篇综述对颗粒捕集在塑造流体界面方面的变革潜力提供了宝贵的见解，为材料科学、生物技术和环境工程等各学科的创新应用铺平了道路。

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Non-fused and fused ring non-fullerene acceptors 非熔融和熔融环状非富勒烯受体

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-19 DOI: 10.1016/j.cocis.2024.101864

Organic solar cells (OSCs) have attracted attention due to their lightweight, flexibility and transparency. Recent advances in OSC materials, especially non-fullerene acceptors (NFAs), have led to marked improvements. NFAs are characterized by their tunable structures and broad absorption spectra, which enhance charge separation and overall performance. These developments make NFAs pivotal materials in advancing OSC technologies and they represent a promising alternative. The development of fused-ring acceptors (FRAs) has enabled power conversion efficiencies (PCEs) over 19 % to be achieved. Despite this success, the intricate synthesis processes and low material yields result in high production costs limiting the commercial viability of FRAs in OSCs. Conversely, non-fused-ring acceptors (NFRAs) offer significant advantages, including easier synthesis, higher yields and improved stability, facilitating the production of cost-effective OSCs. NFRA-based OSCs have provided similar PCE values to FRAs (above 19 %). The research published in recent months on FRAs – particularly NFRAs – is covered in this review.

有机太阳能电池（OSC）因其轻质、灵活和透明而备受关注。有机太阳能电池材料，特别是非富勒烯受体（NFA）的最新进展带来了显著的改进。非富勒烯受体的特点是结构可调、吸收光谱宽广，可增强电荷分离和整体性能。这些发展使非富勒烯受体成为推动 OSC 技术发展的关键材料，也是一种前景广阔的替代材料。熔环受体（FRA）的开发使功率转换效率（PCE）超过了 19%。尽管取得了这一成功，但复杂的合成工艺和较低的材料产量导致生产成本居高不下，限制了 FRA 在 OSC 中的商业可行性。相反，非熔合环受体（NFRA）具有显著的优势，包括更容易合成、更高的产量和更好的稳定性，有利于生产出具有成本效益的 OSC。基于 NFRA 的 OSC 具有与 FRA 相似的 PCE 值（高于 19%）。本综述介绍了近几个月发表的有关 FRA（尤其是 NFRA）的研究成果。

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Rheological effects of rough colloids at fluid interfaces: An overview 粗糙胶体在流体界面上的流变效应：概述

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-19 DOI: 10.1016/j.cocis.2024.101867

Because of the capillary interactions arising from surface corrugation, rough particles at fluid interfaces often exhibit intricate rheological responses to interfacial deformations and material flows, challenging the conventional physicochemical and thermodynamic concepts that were typically applied in bulk suspensions. Although such rheological responses have been widely applied in industrial processes (i.e. crude oil recovery) and some biological systems (i.e. the dynamics of lung alveoli), studies on their physical mechanisms are not summarized systematically. In this work, we present an overview of the rheological effects of rough particle-laden interfaces, where the influences of particles’ softness and geometric roughness are emphatically discussed. We also point out that, relevant rheological effects can be strongly affected by a competition between the particles’ capillary attractions and frictional forces. Potentially, integrating experiments and simulations from a mesoscale perspective would gain deeper insights into the rheological properties for a quasi-2D system.

由于表面波纹产生的毛细管相互作用，流体界面上的粗糙颗粒通常会对界面变形和材料流动表现出复杂的流变反应，这对通常应用于块状悬浮液的传统物理化学和热力学概念提出了挑战。尽管这种流变响应已被广泛应用于工业过程（如原油回收）和某些生物系统（如肺泡动力学），但对其物理机制的研究却没有进行系统总结。在这项工作中，我们概述了粗糙颗粒界面的流变效应，重点讨论了颗粒软度和几何粗糙度的影响。我们还指出，颗粒的毛细吸引力和摩擦力之间的竞争会对相关流变效应产生强烈影响。从中尺度的角度将实验和模拟结合起来，有可能对准二维系统的流变特性有更深入的了解。

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Endowing molecular motions in the solid materials 赋予固体材料中的分子运动

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-18 DOI: 10.1016/j.cocis.2024.101861

Building macro continuous materials that play an important role in our daily lives directly from powder is in line with the development needs of green chemistry. Powders or particles tend to spontaneously aggregate and fuse to reduce the interfacial energy of the system, but compared to solutions or melts, the molecular motion ability in the solid phase is significantly limited. Inspired by the agglomeration of powder and kneading dough, the introduction of a small amount of water and pressure has enabled the preparation of continuous self-supporting materials based on surfactants, and even the construction of ordered molecular membranes through solid-phase molecular self-assembly. This article summarizes the recent work on the construction of macroscopic materials using molecular motion in solid phase, and mainly introduces its principles, self-healing properties, and application directions, including strain sensing, oil absorption, humidity response, circularly polarized luminescence, etc., and looks forward to the future development space.

直接利用粉末制造在日常生活中发挥重要作用的宏观连续材料符合绿色化学的发展需求。粉末或颗粒容易自发聚结融合以降低体系的界面能，但与溶液或熔体相比，固相中的分子运动能力明显有限。受粉末团聚和捏面团的启发，引入少量水和压力就能制备基于表面活性剂的连续自支撑材料，甚至通过固相分子自组装构建有序分子膜。本文总结了近年来利用固相分子运动构建宏观材料的工作，主要介绍了其原理、自修复性能以及应用方向，包括应变传感、吸油、湿度响应、圆偏振发光等，并展望了未来的发展空间。

引用次数: 0

Insights into charge dynamics and recombination processes in ternary organic solar cells through photophysical characterization techniques 通过光物理表征技术深入了解三元有机太阳能电池中的电荷动力学和重组过程

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-18 DOI: 10.1016/j.cocis.2024.101865

The incorporation of a third component in organic solar cells (OSCs), the so-called ternary OSCs, has given rise to an increase in the power conversion efficiencies of the devices. This improvement has been assigned to the broadening of the absorption spectrum, the tuning of the energy levels, and positive changes in the morphology of the active layer, resulting in remarkable power conversion efficiencies (PCE) of up to 20.2 %. Current research highlights the crucial role of morphology in enhancing device performance. However, achieving higher efficiencies requires improved charge dissociation, balanced charge transport, and minimized energy loss and recombination, which is not always attained. This review describes the most common steady-state techniques, such as photoluminescence, and advanced transient techniques, such as transient photovoltage and transient absorption spectroscopy, to gain insights into the photovoltaic charge dynamic processes to contribute to the improvement of the performance of TOSCs.

在有机太阳能电池（OSCs）中加入第三种成分，即所谓的三元 OSCs，可提高设备的功率转换效率。这种提高归因于吸收光谱的拓宽、能级的调整以及活性层形态的积极变化，从而使功率转换效率（PCE）显著提高到 20.2%。目前的研究凸显了形态学在提高器件性能方面的关键作用。然而，要实现更高的效率，就必须改善电荷离解、平衡电荷传输并最大限度地减少能量损耗和重组，而这并非总能实现。本综述介绍了最常见的稳态技术（如光致发光）和先进的瞬态技术（如瞬态光电压和瞬态吸收光谱），以深入了解光伏电荷动态过程，从而促进 TOSCs 性能的提高。

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The rise and potential of top interface modification in tin halide perovskite solar cells 卤化锡过氧化物太阳能电池顶界面改性的兴起与潜力

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-18 DOI: 10.1016/j.cocis.2024.101863

Top interface engineering is becoming one of the preferred methodologies for easily improving tin halide perovskite solar cell efficiency. The particular effectiveness of this strategy for tin-based materials may stem from their fragility in terms of oxidation and defect chemistry. Studies mainly focus on the design of novel fullerenes as interlayers or electron-selective layers, as well as on the application of organic and inorganic molecules of varying sizes. In this mini-review, we highlight the rise and potential of top interface modification in tin halide perovskite solar cells.

顶部界面工程正成为轻松提高卤化锡过氧化物太阳能电池效率的首选方法之一。锡基材料在氧化和缺陷化学方面的脆弱性可能是这一策略特别有效的原因。研究主要集中在设计新型富勒烯作为夹层或电子选择层，以及应用不同大小的有机和无机分子。在这篇微型综述中，我们将重点介绍顶部界面改性在锡卤化物过氧化物太阳能电池中的兴起和潜力。

引用次数: 0

Current progress of perovskite solar cells stability with bibliometric study 包晶体太阳能电池稳定性的最新进展及文献计量学研究

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-16 DOI: 10.1016/j.cocis.2024.101862

Perovskite solar cells have matched or even surpassed commercial silicone-based photovoltaics (PVs) in terms of cost effectiveness and power conversion efficiency. However, the stability is quite far behind the commercial silicone-based PV. Humidity, electrical bias, high temperature, and ultraviolet light are the determining stressors in the degradation of perovskite solar cells. This review provides the current advancement (2022 to July 31^st, 2024) to the stability problem in perovskite solar cells. Equipped with bibliometric study, we deploy keyword analysis, citation analysis, and notable progress to give an overview and latest progress in perovskite solar cells stability. The importance of interface passivation is highlighted. The scalability studies of nontoxic, lead-free, stable perovskite solar cells are expected in near future.

在成本效益和电力转换效率方面，包光体太阳能电池已经赶上甚至超过了商用硅基光伏电池。然而，其稳定性却远远落后于商用硅基光伏电池。湿度、电偏压、高温和紫外线是导致包晶体太阳能电池降解的决定性因素。本综述介绍了目前（2022 年至 2024 年 7 月 31 日）针对包晶体太阳能电池稳定性问题的研究进展。通过文献计量学研究，我们采用关键词分析、引文分析和显著进展等方法，概述了包晶体太阳能电池稳定性方面的最新进展。我们强调了界面钝化的重要性。无毒、无铅、稳定的包晶体太阳能电池的可扩展性研究有望在不久的将来实现。

引用次数: 0

How to use stimuli-responsive soft materials for detection? 如何使用刺激响应软材料进行探测？

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-14 DOI: 10.1016/j.cocis.2024.101860

The growing demand for rapid, cost-effective, and user-friendly detection methods has driven advancements in “stimuli-responsive soft materials” for sensor development. Many examples of complex and liquid crystals emulsions can be found demonstrating their application for the detection of bacteria, virus, enzyme, or specific molecules. However, despite frequent comparisons between emulsions and foams, the exploration of liquid foams for sensor applications remains limited. Paradoxically, foam-based sensors for fetal lung maturity were developed in the 1970s, before the emergence of more sophisticated detection methods. Here, we describe some examples of soft interfaces used as sensor to detect biomarkers, enzymes, and bacteria, with a strong emphasis on foam. We demonstrate how to use the foamability and foam stability as read-out mechanism. We discuss approaches developed for complex emulsions and liquid crystals, highlighting their potential adaptation to liquid foams.

对快速、经济、方便的检测方法的需求日益增长，推动了用于传感器开发的 "刺激响应软材料 "的进步。许多复杂的液晶乳液应用于细菌、病毒、酶或特定分子的检测。然而，尽管经常对乳液和泡沫进行比较，但对液态泡沫传感器应用的探索仍然有限。矛盾的是，基于泡沫的胎肺成熟度传感器是在 20 世纪 70 年代开发的，当时还没有出现更先进的检测方法。在此，我们介绍了一些用作传感器检测生物标记物、酶和细菌的软界面的例子，重点是泡沫。我们展示了如何利用泡沫性和泡沫稳定性作为读出机制。我们讨论了针对复杂乳液和液晶开发的方法，强调了这些方法适用于液态泡沫的潜力。

引用次数: 0

Iron-organic matter colloid control rare earth element environmental mobility 铁有机物胶体控制稀土元素的环境流动性

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL

Current Opinion in Colloid & Interface Science

Pub Date : 2024-09-13 DOI: 10.1016/j.cocis.2024.101859

Rare earth elements (REE) have raised significant environmental concerns due to their increasing use in human activities and subsequent release into the environment. Hence, in the context of growing demand for “green” technologies and potential mismanagement of their life cycle, understanding their potential mobility within and between environmental compartments becomes crucial for evaluating their environmental risks. Colloids emerge as primary carriers/vectors facilitating REE mobility and transfer in the environment. This work addresses major topics related to the control exerted by colloids on the REE speciation and subsequent patterns. Among colloids, iron-organic matter colloids have been identified as the major REE carrier in surface water under various pedoclimatic conditions. Compelling evidences were provided that the mixing of iron-, organic- and iron-organic colloids could explain both REE concentration and pattern under environmental conditions. However, there is currently a lack of data on the specific distribution of REE between the iron and organic matter phases within Fe-OM colloids. It remains unclear whether REE distribution is primarily controlled by colloid mixing since structural rearrangements of Fe-OM colloids under varying hydrological and physicochemical conditions exert also a significant role.

由于稀土元素（REE）在人类活动中的使用日益增多，并随之释放到环境中，因此引起了人们对环境问题的极大关注。因此，在对 "绿色 "技术的需求不断增长以及对其生命周期的潜在管理不善的背景下，了解稀土元素在环境区划内和环境区划间的潜在流动性对于评估其环境风险至关重要。胶体是促进稀土元素在环境中流动和转移的主要载体/载体。本研究探讨了与胶体对 REE 分型及后续模式的控制有关的主要课题。在胶体中，铁-有机物胶体已被确定为各种气候条件下地表水中的主要 REE 载体。有令人信服的证据表明，铁胶体、有机胶体和铁有机胶体的混合可以解释环境条件下的 REE 浓度和模式。不过，目前还缺乏有关铁-有机质胶体中铁相和有机质相之间 REE 具体分布情况的数据。目前还不清楚 REE 分布是否主要受胶体混合的控制，因为在不同的水文和物理化学条件下，Fe-OM 胶体的结构重排也发挥着重要作用。

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