Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献_第2页

Preparation characteristics of water-in-oil-in-water emulsions using an asymmetric straight-through microchannel array device: Effect of water-soluble and oil-soluble emulsifiers 非对称直通式微通道阵列装置制备油包水乳液的特性：水溶性和油溶性乳化剂的影响

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-29 DOI: 10.1016/j.colsurfa.2026.139754

Takashi Kuroiwa, Chiaki Tamai

Water-in-oil-in-water (W/O/W) multiple emulsions were prepared using an emulsification device equipped with an asymmetric straight-through microchannel array. An oil-soluble emulsifier, polyglycerin-polycondensed ricinoleic acid ester (PGPR) was added to the oil phase (soybean oil), and water-soluble emulsifiers, sodium caseinate (SC) or Tween 80, were added to the external water phase (NaCl aqueous solution). How the concentrations of these emulsifiers affect the multiple droplet size and entrapment yield (EY) of a water-soluble fluorescent dye, calcein, were investigated. The influence of the emulsifier concentration on the droplet diameter was similar regardless of the emulsifier type: a certain concentration was required to form monodisperse multiple droplets, whereas above this concentration, no significant change in the average droplet diameter or diameter distribution was observed. By contrast, the EY strongly depended on the PGPR concentration and reached 90 % at higher PGPR concentrations (>5 wt%), whereas the SC concentration had little effect. Furthermore, the stability of the droplet diameter and calcein encapsulation in the W/O/W emulsions was evaluated during storage for 4 weeks (in the dark at room temperature). Even after 4 weeks of storage, more than 50 % of the encapsulated calcein was retained in the internal water droplets, although an initial leakage occurred on the first day. These results indicate that the stability of internal water droplets, governed mainly by the PGPR concentration in the oil phase, plays a crucial role in achieving high encapsulation efficiency and storage stability in W/O/W emulsions prepared by microchannel emulsification.

采用非对称直通式微通道阵列的乳化装置制备了油包水（W/O/W）复合乳液。油相（大豆油）中加入一种油溶性乳化剂聚甘油-聚缩合蓖麻油酸酯（PGPR），外水相（NaCl水溶液）中加入一种水溶性乳化剂酪蛋白酸钠（SC）或吐温80。研究了这些乳化剂的浓度如何影响水溶性荧光染料钙黄蛋白的多滴大小和包封率。无论乳化剂类型如何，乳化剂浓度对液滴直径的影响都是相似的：形成单分散的多个液滴需要一定的浓度，而在此浓度以上，液滴的平均直径和直径分布没有明显变化。相比之下，EY强烈依赖于PGPR浓度，在较高的PGPR浓度下达到90 % (>5 wt%)，而SC浓度几乎没有影响。此外，在室温黑暗条件下，对W/O/W乳剂中液滴直径和钙黄蛋白包封的稳定性进行了评价。即使在储存4周后，超过50% %的包裹钙黄蛋白保留在内部水滴中，尽管在第一天发生了最初的泄漏。上述结果表明，微通道乳化制备的水乳状液具有较高的包封效率和储存稳定性，其内部水滴的稳定性主要由油相中PGPR的浓度决定。

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引用次数: 0

Sequential silica- and phosphate-assisted zirconia coating for phase stabilization of micrometer-sized platy γ-alumina 连续二氧化硅和磷酸盐辅助氧化锆涂层用于微米级γ-氧化铝板的相稳定

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-27 DOI: 10.1016/j.colsurfa.2026.139721

Shingo Machida , Daisaku Yokoe , Toshimichi Shibue , Hajime Okawa , Takayuki Nagano

Sequential modification was applied to stabilize of γ-alumina toward phase transformation into α-alumina even at the relatively high temperature of 1300°C. A zirconia layer was first deposited, followed by phosphorus introduction through trimethylphosphate treatment, and finally a silica coating via a sol–gel reaction. Phase and structural evolution were characterized by X-ray diffraction, solid-state nuclear magnetic resonance, and electron microscopy. While zirconia-coated specimens transformed into α-alumina at 1300°C, the combined incorporation of phosphorus and silica—through sequential coatings of zirconia containing phosphorus and silica—effectively suppressed zirconia crystallization on γ-alumina. This stabilization also delayed the γ-to-α phase transformation even after calcination at 1300°C. In this process, phosphorus contributes to the stabilization through the formation of zirconium and aluminum phosphates, resulting from its diffusion from the zirconia layers into the underlying γ-alumina, whereas silica promotes the formation of Si–O–Zr linkages while preserving its coating layer. These effects cooperatively suppress zirconia crystallization. Therefore, these results demonstrated that sequential multi-element modification provides a promising route to enhance the phase stability of various as-prepared γ-aluminas.

在1300℃的高温下，通过序次改性使γ-氧化铝向α-氧化铝的相变趋于稳定。首先沉积氧化锆层，然后通过三甲基磷酸盐处理引入磷，最后通过溶胶-凝胶反应形成二氧化硅涂层。通过x射线衍射、固体核磁共振和电子显微镜对物相和结构演化进行了表征。当氧化锆涂层的样品在1300℃时转变为α-氧化铝时，磷和硅的结合-通过连续的含磷氧化锆和含硅氧化锆涂层-有效地抑制了氧化锆在γ-氧化铝上的结晶。即使在1300℃煅烧后，这种稳定性也延迟了γ-to-α相变。在这一过程中，磷从氧化锆层扩散到下面的γ-氧化铝层，从而形成磷酸锆和磷酸铝，从而有助于稳定，而二氧化硅在保留其涂层的同时促进了Si-O-Zr键的形成。这些效应共同抑制氧化锆结晶。因此，这些结果表明，顺序多元素修饰为提高各种制备的γ-氧化铝的相稳定性提供了一条有希望的途径。

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引用次数: 0

Dual modulation vertical transistor fabricated by CVD grown CsPbBr3 as channel layer and MWCNT as source electrode 以CVD生长CsPbBr3为沟道层，MWCNT为源电极制备双调制垂直晶体管

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-30 DOI: 10.1016/j.colsurfa.2026.139771

Bingxue Liu , Chandrasekar Perumalveeramalai , Chuanbo Li , Peipei Ma , Bin Zou

This paper presents the fabrication of a vertical field-effect transistor (vFET) with multi-walled carbon nanotubes (MWCNT) as a porous source electrode. The optimized MWCNT electrodes, which were deposited on a SiO₂/Si (100), followed by thermal annealing, showed a sheet resistance of ∼4.1 kΩ/□ and an electrical conductivity of 3.92 × 10³ S/m at a layer thickness of ∼1.82 µm. A high-crystalline CsPbBr₃ was deposited as the channel layer by chemical vapour deposition technique. The optimized condition for MWCNT electrode was used for fabricating vFET device with CsPbBr₃ as the channel layer. The vFET has shown high on/off ratio of ∼10⁶ in the p-channel region and ∼10⁴ in the n-channel region. Our device has shown modulation of output current both at gate voltage and at drain voltage due to polarity change of Schottky contact at CNT/perovskite interface. This study establishes a novel approach to fabricate high-performance vertical transistors by using MWCNT as the source electrode.

本文介绍了一种以多壁碳纳米管（MWCNT）作为多孔源电极的垂直场效应晶体管（vFET）的制备方法。将优化后的MWCNT电极沉积在SiO2/Si（100）上，然后进行热处理，在层厚度为~ 1.82 µm时，其片电阻为~ 4.1 kΩ/□，电导率为3.92 × 103 S/m。采用化学气相沉积技术制备了高晶CsPbBr3作为通道层。利用优化后的MWCNT电极条件，制备了以CsPbBr3为通道层的vFET器件。该vFET在p沟道区域显示出高开/关比，在n沟道区域显示出高开/关比，分别为~ 106和~ 104。由于碳纳米管/钙钛矿界面上肖特基触点的极性变化，我们的器件显示出在栅极电压和漏极电压下的输出电流调制。本研究建立了一种以MWCNT为源电极制造高性能垂直晶体管的新方法。

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引用次数: 0

Ratiometric fluorescent sensor using molecularly imprinted polymer with a metal-organic framework for the determination of propazine 金属有机骨架分子印迹聚合物比例荧光传感器测定丙嗪

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-29 DOI: 10.1016/j.colsurfa.2026.139764

Chonthicha Buachumthamrongsuk , Noppanut Longnapa , Opas Bunkoed

A ratiometric fluorescent sensor was developed for the determination of the herbicide propazine. The sensor was fabricated using an iron-based metal-organic framework (NH₂-MIL-101(Fe)) incorporated into a molecularly imprinted polymer (MIP). The fabricated nanoprobe emitted high fluorescence intensity at 444 nm, which was used as the sensing signal. The fluorescence emission of rhodamine B (RhB) at 574 nm was used as the reference signal. The sensing probe was characterized, and the construction and detection conditions were optimized. The quantitative analysis of propazine was based on the fluorescence quenching of the sensing nanoprobe by propazine. The NH₂-MIL-101(Fe)@MIP/RhB system exhibited a linear range from 20.0 to 1000.0 μg L⁻¹ with a detection limit of 9.1 μg L⁻¹. The fabricated nanoprobe was applied to determine propazine in plant-based milk samples. Recoveries were achieved in the range of 91.2–108.7 % with RSDs lower than 12 %. For on-site detection, a smartphone-assisted device was employed to measure fluorescence color changes, offering portability, rapid analysis, and cost-effectiveness. The developed sensing probe provided a reliable and efficient approach for on-site analysis, and the results were consistent with HPLC-DAD analysis.

研制了一种测定除草剂丙嗪的比例荧光传感器。该传感器是用铁基金属有机骨架（NH2-MIL-101(Fe)）结合到分子印迹聚合物（MIP）中制成的。制备的纳米探针在444 nm处发出高荧光强度，作为传感信号。以罗丹明B （RhB）在574 nm处的荧光发射作为参考信号。对传感探头进行了表征，并对其结构和检测条件进行了优化。定量分析是基于感应纳米探针被丙烷猝灭的荧光。NH2-MIL-101(Fe)@MIP/RhB体系在20.0 ~ 1000.0 μg L−1范围内呈线性关系，检出限为9.1 μg L−1。将制备的纳米探针应用于植物乳样品中丙嗪的测定。加样回收率为91.2 ~ 108.7 %,rsd < 12 %。对于现场检测，使用智能手机辅助设备测量荧光颜色变化，具有便携性，快速分析和成本效益。该传感探针为现场分析提供了可靠、高效的方法，其结果与HPLC-DAD分析结果一致。

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引用次数: 0

Cu-CDs drive the formation of protein tribo-film on the porous UHMWPE to achieve auto-antifriction property in BSA solution Cu-CDs驱动多孔超高分子量聚乙烯在BSA溶液中形成蛋白质摩擦膜，实现自摩擦性能

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-27 DOI: 10.1016/j.colsurfa.2026.139724

N.N. Zhen , K.H. Chen , M.T. Li , F. Wen , Q.Y. Deng

Ultra-high-molecular weight polyethylene (UHMWPE) is the most widely used friction material for artificial joints. Polyethylene debris generated during its use is the main reason behind the aseptic loosening of artificial joints. Improving the wear resistance of UHMWPE and reducing debris generation have been the focus of research in this field. Inspired by the structure of natural cartilage and based on our previous research, we developed a new type of porous UHMWPE-based artificial joint material doped with copper-containing carbon dots (Cu-CDs). In a protein-containing lubricating medium, this material exhibited auto-antifriction properties by absorbing/releasing the lubricating medium and forming a protein film on the tribo-interface. These effects can significantly enhance the wear resistance of UHMWPE. The results showed that spherical Cu-CDs with an average size of 5–6 nm were successfully prepared. The tensile strength of the porous UHMWPE doped with Cu-CDs (Cu-CDs@UHMWPE) (approximately 9.93 MPa) was close to that of natural joint cartilage. Cu-CDs@UHMWPE promoted the adsorption of proteins by the friction interface and formed a protein film that reduced wear. Under the same friction conditions, the wear index of Cu-CDs@UHMWPE was approximately three times lower than that of pure UHMWPE. This study showed that UHMWPE can be imbued with the ability to form protein films to enhance wear resistance, and these findings provide experimental and theoretical evidence for the development of novel biomimetic artificial joint materials.

超高分子量聚乙烯（UHMWPE）是应用最广泛的人工关节摩擦材料。其使用过程中产生的聚乙烯碎片是人工关节无菌性松动的主要原因。提高超高分子量聚乙烯的耐磨性，减少碎片的产生一直是该领域的研究热点。受天然软骨结构的启发，在前人研究的基础上，我们开发了一种新型的掺杂含铜碳点（Cu-CDs）的多孔uhmwpe基人工关节材料。在含蛋白质的润滑介质中，该材料通过吸附/释放润滑介质并在摩擦界面上形成蛋白质膜而表现出自抗摩擦性能。这些作用可以显著提高超高分子量聚乙烯的耐磨性。结果表明，成功制备了平均尺寸为5 ~ 6 nm的球形Cu-CDs。Cu-CDs掺杂的多孔UHMWPE （Cu-CDs@UHMWPE）的抗拉强度约为9.93 MPa，接近天然关节软骨的抗拉强度。Cu-CDs@UHMWPE促进了摩擦界面对蛋白质的吸附，形成了减少磨损的蛋白质膜。在相同的摩擦条件下，Cu-CDs@UHMWPE的磨损指数比纯UHMWPE的磨损指数低约3倍。研究结果表明，UHMWPE具有形成蛋白膜的能力，从而增强了其耐磨性，为新型仿生人工关节材料的开发提供了实验和理论依据。

{"title":"Cu-CDs drive the formation of protein tribo-film on the porous UHMWPE to achieve auto-antifriction property in BSA solution","authors":"N.N. Zhen , K.H. Chen , M.T. Li , F. Wen , Q.Y. Deng","doi":"10.1016/j.colsurfa.2026.139724","DOIUrl":"10.1016/j.colsurfa.2026.139724","url":null,"abstract":"<div><div>Ultra-high-molecular weight polyethylene (UHMWPE) is the most widely used friction material for artificial joints. Polyethylene debris generated during its use is the main reason behind the aseptic loosening of artificial joints. Improving the wear resistance of UHMWPE and reducing debris generation have been the focus of research in this field. Inspired by the structure of natural cartilage and based on our previous research, we developed a new type of porous UHMWPE-based artificial joint material doped with copper-containing carbon dots (Cu-CDs). In a protein-containing lubricating medium, this material exhibited auto-antifriction properties by absorbing/releasing the lubricating medium and forming a protein film on the tribo-interface. These effects can significantly enhance the wear resistance of UHMWPE. The results showed that spherical Cu-CDs with an average size of 5–6 nm were successfully prepared. The tensile strength of the porous UHMWPE doped with Cu-CDs (Cu-CDs@UHMWPE) (approximately 9.93 MPa) was close to that of natural joint cartilage. Cu-CDs@UHMWPE promoted the adsorption of proteins by the friction interface and formed a protein film that reduced wear. Under the same friction conditions, the wear index of Cu-CDs@UHMWPE was approximately three times lower than that of pure UHMWPE. This study showed that UHMWPE can be imbued with the ability to form protein films to enhance wear resistance, and these findings provide experimental and theoretical evidence for the development of novel biomimetic artificial joint materials.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139724"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Highly crystalline carbon dots as dual function interfacial modifiers for defect passivation and phase stabilization in perovskite solar cells 高结晶碳点作为钙钛矿太阳能电池缺陷钝化和相稳定的双功能界面改进剂

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-26 DOI: 10.1016/j.colsurfa.2026.139722

Junjie Wang , Xinxin Li , Haozhi Jiao , Jiansheng Yang , Lingpeng Yan , Changzeng Ding , Yongzhen Yang , Chang-Qi Ma

Perovskite solar cells (PSCs) have achieved remarkable power conversion efficiencies, however, their operational instability originating from buried interfacial defects and phase degradation of perovskites remains a critical challenge. Although carbon dots (CDs) have been widely explored as defect passivators, their capability to regulate perovskite phase stability has rarely been explored. In this study, we report highly crystalline carbon dots enriched with amino, carboxyl, and hydroxyl groups as a dual-function interfacial modifier at the SnO₂/perovskite buried interface. Distinct from conventional amorphous CDs, the high crystallinity of these CDs enables enhanced defect-passivation capability and improved ability to suppress harmful phase transitions, thereby simultaneously passivating Pb²⁺-related defects and suppressing the detrimental α-to-δ phase transition during device operation. The multifunctional surface groups coordinate with undercoordinated Pb²⁺ and I⁻, thereby effectively inhibiting the formation of PbI₂ and the phase degradation of perovskites. Consequently, the CDs-modified perovskite films exhibit improved crystallinity, enlarged grain sizes, suppressed interfacial non-radiative recombination and enhanced interfacial charge extraction. The optimized PSCs deliver a champion power conversion efficiency of 21.50 % and retain 83 % of their initial efficiency after 1000 h of continuous illumination, significantly outperforming the control devices, which retain only 43 %. This work reveals an overlooked role of crystalline carbon dots in regulating perovskite phase stability and provides a simple, low-cost, and effective strategy for simultaneously improving the efficiency and operational stability of PSCs.

钙钛矿太阳能电池（PSCs）已经取得了显著的功率转换效率，然而，由钙钛矿的埋藏界面缺陷和相降解引起的运行不稳定性仍然是一个关键的挑战。虽然碳点作为缺陷钝化剂已被广泛研究，但其调节钙钛矿相稳定性的能力却很少被研究。在这项研究中，我们报道了富含氨基、羧基和羟基的高结晶碳点作为SnO2/钙钛矿埋藏界面的双功能界面调节剂。与传统的非晶CDs不同，这些CDs的高结晶度增强了缺陷钝化能力，提高了抑制有害相变的能力，从而在钝化Pb 2 +相关缺陷的同时，抑制了器件运行过程中有害的α-to-δ相变。多功能表面基团与欠配位的Pb 2 +和I⁻配合，有效抑制了PbI2的形成和钙钛矿的相降解。结果表明，cd修饰的钙钛矿薄膜结晶度提高，晶粒尺寸增大，界面非辐射复合抑制，界面电荷提取增强。优化后的psc提供了21.50%的冠军功率转换效率，并在1000 h的连续照明后保持了83%的初始效率，显著优于控制设备，后者仅保持了43%。这项工作揭示了晶体碳点在调节钙钛矿相稳定性方面被忽视的作用，并为同时提高PSCs的效率和运行稳定性提供了一种简单、低成本和有效的策略。

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引用次数: 0

In situ self-assembly of Fe-N-C oxygen reduction catalysts and morphology evolution triggered by sulfates Fe-N-C氧还原催化剂的原位自组装及硫酸盐引发的形貌演化

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-26 DOI: 10.1016/j.colsurfa.2026.139708

Linxuan Cao , Qiongyao Guo , Qingmin Hu, Junping Dong

Transition-metal-nitrogen-carbon catalysts have been considered one of the most promising oxygen reduction catalysts. Generally, direct pyrolysis and template approaches are popular in preparation of ORR catalysts. Yet these methods are restricted to a certain extent due to their inherent flaws. Therefore, the elaborate design and controllable synthesis of catalysts still remain challenges. Here, Polydopamine-derived Fe-N-C catalysts are in situ fabricated by self-assembly strategy. Nanorod-like catalysts were obtained by pyrolysis of FeSO₄-Phen/PDA/F127@trimethylbenzene composite micelles. The introduction of SO₄^2- ion plays a critical role in the morphology evolution from nanospheres to nanorods with the assistance of phenanthroline. The presence of trimethylbenzene (TMB) facilitates the dispersion of single atom Fe on the surface of composite micelles. Thus the simultaneous modulation of active sites and carbon architectures on Fe-N-C catalysts were achieved by finely regulating the interfaces of composite micelles. The novel catalyst exhibits good ORR activity and durability over Pt/C catalyst with more positive half-wave potential and higher current density. The good electrocatalytic performances are attributed to the larger surface areas, hierarchical porous structures and highly active FeN₄ sites. Moreover, Zn-air battery fabricated with Fe-N-C catalysts as the air cathode display higher power density of 116 mW cm⁻² and specific capacity of 713 mA h g⁻¹. This work will open up a new avenue for in situ fabrication of M-N-C catalysts (M=Cu, Co, Ni, Mn, Zn) via self-assembly strategy.

过渡金属-氮-碳催化剂被认为是最有前途的氧还原催化剂之一。一般来说，直接热解法和模板法是制备ORR催化剂的常用方法。然而，这些方法由于其固有的缺陷，在一定程度上受到了限制。因此，催化剂的精细设计和可控合成仍然是一个挑战。本研究通过自组装策略原位制备了聚多巴胺衍生的Fe-N-C催化剂。通过热解FeSO4-Phen/PDA/F127@trimethylbenzene复合胶束制备纳米棒状催化剂。在菲罗啉的辅助下，SO42-离子的引入对纳米球向纳米棒的形态演变起着至关重要的作用。三甲基苯（TMB）的存在有利于单原子铁在复合胶束表面的分散。因此，通过精细调节复合胶束的界面，可以实现Fe-N-C催化剂上活性位点和碳结构的同步调节。与正半波电位高、电流密度大的Pt/C催化剂相比，该催化剂具有良好的ORR活性和耐久性。其良好的电催化性能主要归功于较大的比表面积、层次化的多孔结构和高活性的FeN4位点。以Fe-N-C催化剂为空气阴极制备的锌空气电池具有较高的功率密度（116 mW cm−2）和比容量（713 mA h g−1）。这项工作将为通过自组装策略原位制备M- n - c催化剂（M=Cu, Co, Ni, Mn, Zn）开辟一条新的途径。

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引用次数: 0

Development and comprehensive evaluation of Tetronic® 1304-Labrasol® mixed micelles for lung-targeted drug delivery: A physicochemical, biological, and computational approach for improved pulmonary chemotherapy 用于肺靶向给药的Tetronic®1304-Labrasol®混合胶束的开发和综合评估：一种改善肺部化疗的物理化学、生物和计算方法

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-02-05 DOI: 10.1016/j.colsurfa.2026.139870

Gaurang Dalsaniya , Deep Bhalani , Aakash Shukla , Mayursing Girase , Gitika Kharkwal , Ketan Kuperkar , Sugam Kumar , Vinod K. Aswal , Sadafara A. Pillai

Lung-targeted drug delivery has emerged as one of the most promising strategies for treating lung cancer, enhancing local drug accumulation while minimizing systemic toxicity. Pulmonary drug delivery is a key focus of nanomedicine, enabling the direct administration of chemotherapeutics to the lungs. Herein, we report the formulation and detailed physicochemical characterization of mixed micelles composed of Tetronic® 1304, a pH- and thermo-responsive block copolymer, and Labrasol®, a nonionic surfactant known for its emulsifying and permeation-enhancing properties. The phase behavior was evaluated by cloud point (CP) measurements, micellar size and shape by dynamic light scattering (DLS), small-angle neutron scattering (SANS), and relative viscosity by viscosity measurements. The hydrophobic model anticancer drug quercetin (QCT) was encapsulated into mixed micelles, and its increased solubility was confirmed by UV–visible spectroscopy. The in vitro cytotoxicity against lung epithelial adenocarcinoma cells (A549) was studied via an MTT assay, where IC₅₀ values were calculated to define the efficiency of drug-loaded micelles. Moreover, increased intracellular reactive oxygen species (ROS) levels, along with nuclear damage, evidenced that micelles induced both apoptosis and necrosis. These results demonstrated that T1304-Labrasol® mixed micelles are efficient nanocarriers of hydrophobic drugs in pulmonary applications. DFT-based computational analysis revealed that mixing T1304-Labrasol® induces favorable dipole alignment, enhanced thermodynamic stability, and increased electronic softness, collectively promoting stronger intermolecular interactions and improved self-assembly behaviour. This study provides important insight into their possible applications as nanocarriers in lung-targeted chemotherapy and thus constitutes a contribution to developing more active and targeted nanomedicine-based treatments against lung cancer.

肺靶向给药已成为治疗肺癌最有前途的策略之一，增强局部药物积累，同时最大限度地减少全身毒性。肺部给药是纳米医学的一个关键焦点，它使化疗药物能够直接给药到肺部。在此，我们报告了混合胶束的配方和详细的物理化学表征，该胶束由tronic®1304（一种pH和热响应嵌段共聚物）和Labrasol®（一种以其乳化和增强渗透特性而著称的非离子表面活性剂）组成。通过云点（CP）测量、动态光散射（DLS）、小角中子散射（SANS）和相对粘度测量来评估相行为。将疏水模型抗癌药物槲皮素（QCT）包封成混合胶束，紫外可见光谱证实其溶解度增加。通过MTT试验研究了对肺上皮腺癌细胞（A549）的体外细胞毒性，其中计算IC₅0值以定义载药胶束的效率。此外，细胞内活性氧（ROS）水平的升高，以及核损伤，证明胶束诱导了细胞凋亡和坏死。这些结果表明，T1304-Labrasol®混合胶束是肺应用中疏水药物的高效纳米载体。基于dft的计算分析显示，混合T1304-Labrasol®诱导了有利的偶极子排列，增强了热力学稳定性，增加了电子柔软度，共同促进了更强的分子间相互作用和改善的自组装行为。这项研究为它们作为纳米载体在肺靶向化疗中的可能应用提供了重要的见解，从而为开发更有效和靶向的基于纳米药物的肺癌治疗做出了贡献。

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引用次数: 0

Brownian dynamics simulation of structural evolution in drying colloid-polymer mixtures 干燥胶体-聚合物混合物结构演化的布朗动力学模拟

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-26 DOI: 10.1016/j.colsurfa.2026.139719

Hyunjeong An, Young Ki Lee

Drying-induced structural evolution in colloid–polymer mixtures plays a crucial role in determining the mechanical and functional properties of composite films. Despite its practical relevance, theoretical studies that simultaneously resolve interfacial stratification and pore/packing evolution during drying of colloid–polymer mixtures remain limited. Here, Brownian dynamics simulations were conducted to elucidate the effects of polymer concentration, chain length, and colloid–polymer interactions on the microstructure of dried colloid–polymer films. Polymer addition markedly altered interfacial stratification and particle packing. In the colloid-only dispersed system, colloidal particles progressively accumulated and packed near the liquid–gas interface; in contrast, in colloid–polymer mixtures, the interfacial region became increasingly enriched with polymer during drying, hindering the formation of a densely packed colloidal layer. An increasing polymer concentration promoted the development of a polymer-enriched layer near the liquid–gas interface, suppressing colloidal accumulation and increasing interfacial porosity. Voronoi analysis was employed to quantitatively characterize the colloidal structures formed within the dried films. Higher polymer concentrations led to greater heterogeneity in interparticle spacing and broader pore-size distributions, whereas variations in polymer chain length exerted only a minor influence on the structural evolution within the tested range. Finally, introducing colloid–polymer attraction through a Lennard–Jones potential significantly reduced polymer migration toward the interface, thereby yielding denser packing and narrower pore-size distributions. These findings suggest that colloid–polymer affinity can be an important factor influencing final film morphology under convection-dominated drying. The present study provides insights into microstructural control in functional colloid–polymer coatings and drying processes, while highlighting the utility of simulation-based prediction for film formation.

干燥诱导的胶体-聚合物混合物的结构演变对复合膜的力学和功能性能起着至关重要的作用。尽管具有实际意义，但同时解决胶体-聚合物混合物干燥过程中界面分层和孔隙/堆积演变的理论研究仍然有限。本文通过布朗动力学模拟来阐明聚合物浓度、链长和胶体-聚合物相互作用对干燥的胶体-聚合物薄膜微观结构的影响。聚合物的加入显著改变了界面分层和颗粒堆积。在纯胶体分散体系中，胶体颗粒在液气界面附近逐渐积聚和堆积；相反，在胶体-聚合物混合物中，在干燥过程中，界面区域越来越多地富集聚合物，阻碍了致密堆积胶体层的形成。聚合物浓度的增加促进了液气界面附近富集聚合物层的发育，抑制了胶体的聚集，增加了界面孔隙度。Voronoi分析用于定量表征干燥膜内形成的胶体结构。聚合物浓度越高，颗粒间距的非均质性越大，孔径分布越宽，而聚合物链长度的变化对测试范围内结构演化的影响较小。最后，通过Lennard-Jones势引入胶体-聚合物吸引力，显著减少了聚合物向界面的迁移，从而产生更致密的填料和更窄的孔隙尺寸分布。这些发现表明，在对流主导的干燥条件下，胶体-聚合物亲和度可能是影响最终膜形态的重要因素。本研究为功能性胶体聚合物涂层和干燥过程的微观结构控制提供了见解，同时强调了基于模拟的薄膜形成预测的实用性。

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引用次数: 0

Heterojunction tailored-engineering for enhanced photoreduction applications on H2 production and Cr(VI) degradation 在H2生产和Cr（VI）降解中增强光还原应用的异质结定制工程

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-29 DOI: 10.1016/j.colsurfa.2026.139757

Shu Wang , Jie Liu , Yupu Liu , Dongxu Shi, Jialu Xu, Shuang Han, Wenlong Yang

In this work, we propose "nano-lab" concept for precisely regulating the energy band structure of heterojunction photocatalysts to achieve tailored heterostructure modulation. The heterostructure was constructed via in situ deposition growth, while atomic doping strategies were employed to precisely modulate the band edge positions. A combination of systematic experimental characterizations and theoretical simulations was utilized to elucidate the charge transfer pathway, heterostructure evolution, and the underlying mechanism of the heterojunction effect. Based on a non-ideal Type-I heterojunction, the introduction of Fe 3d and Zn 4 s orbitals selectively modulated the valence band of SrTiO₃ and the conduction band of Zn_0.7Cd_0.3S, respectively. This resulted in a sequential transformation of the heterostructure from Type-I (CdS/SrTiO₃) to Type-Ⅱ (CdS/Fe–SrTiO₃) and finally to an S-scheme configuration (Zn_0.7Cd_0.3S/Fe–SrTiO₃). As a result, efficient spatial charge separation was achieved in both CdS/Fe–SrTiO₃ and Zn_0.7Cd_0.3S/Fe–SrTiO₃, with the latter exhibiting superior redox thermodynamic potentials. Although Zn_0.7Cd_0.3S/Fe–SrTiO₃ demonstrated the highest Cr(VI) degradation performance, it showed only the second-best H₂ evolution activity due to its reduced visible-light absorption and higher H* adsorption free energy compared to CdS/Fe–SrTiO₃. Therefore, the optimal photocatalyst should not be determined solely by the heterostructure type, but rather by the synergistic interplay of multiple factors governing photocatalytic efficiency.

在这项工作中，我们提出了“纳米实验室”的概念来精确调节异质结光催化剂的能带结构，以实现定制的异质结构调制。异质结构是通过原位沉积生长构建的，而原子掺杂策略则用于精确调制能带边缘位置。利用系统的实验表征和理论模拟相结合的方法，阐明了电荷转移途径、异质结构的演变以及异质结效应的潜在机制。在非理想i型异质结的基础上，Fe 3d和zn4 s轨道的引入分别选择性地调制了SrTiO3的价带和Zn0.7Cd0.3S的导带。这导致异质结构从Type- i （CdS/SrTiO₃）到Type-Ⅱ（CdS/ Fe-SrTiO₃）的顺序转换，最后到s方案配置（Zn0.7Cd0.3S/ Fe-SrTiO₃）。结果表明，CdS/ Fe-SrTiO₃和Zn0.7Cd0.3S/ Fe-SrTiO₃都实现了有效的空间电荷分离，其中Zn0.7Cd0.3S/ Fe-SrTiO₃表现出更好的氧化还原热力学势。虽然Zn0.7Cd0.3S/ Fe-SrTiO₃表现出最高的Cr（VI）降解性能，但与CdS/ Fe-SrTiO₃相比，由于其降低了可见光吸收和更高的H*吸附自由能，它仅表现出第二好的H₂演化活性。因此，最佳光催化剂不应仅由异质结构类型决定，而应由控制光催化效率的多种因素的协同相互作用决定。

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引用次数: 0