DLVO interaction energies between hollow nanoparticles and fractal surfaces

文献类型： 外文期刊

第一作者： Wang, Hong

作者： Wang, Hong;Yao, Li;Zhang, Qi;Wang, Lin;Wu, Yueying;Cai, Kai;Lin, Chaowen;Chen, Honglin;Liu, Dinghui;Shen, Chongyang;Huang, Yuanfang

作者机构：

关键词： Hollow nanoparticle; Fractal surface; Attachment; Detachment

期刊名称：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS （ 影响因子：5.4； 五年影响因子：5.2 ）

ISSN： 0927-7757

年卷期： 2025 年 708 卷

页码：

收录情况： SCI

摘要： Quantifying interfacial interaction energy between the 30 nm hollow nanoparticles and fractal surfaces is the prerequisite for quantitatively understanding and evaluating the environmental risks of hollow nanoparticles and their associated pollutants. Although some studies have investigated the interaction energy between hollow nanoparticles and a planar surface, the influence of different fractal dimension D or fractal roughness G on the interaction energies of hollow nanoparticles with different interior fluids under different ionic strengths is unclear. In this study, the attachment and detachment of the 30 nm hollow nanoparticles from fractal surfaces were evaluated through computing the extended Derjaguin-Landau-Verwey-Overbeek (extended-DLVO) interaction energies with the three-dimensional space based on surface element integration (SEI). The results indicated that for hollow nanoparticles filled with water, the primary minimum decreased slightly with all fractal surfaces, while it reduced significantly between hollow nanoparticles filled with air and fractal surfaces at 1 mM. Interestingly, the maximum energy barrier for hollow nanoparticles increased significantly, especially for hollow nanoparticles filled with air at the 200 mM ionic strength or with fractal surfaces with largestD value or smallest G value. Compared with solid nanoparticles, the attachment efficiency in the primary minimum decreased slightly at the ionic strength from 1 to 100 mM for both hollow nanoparticles, and reduced significantly at 200 mM, especially for nanoparticles filled with air. The reduced attachment efficiency in primary minimum decreased with the increasing fractal dimension D and decreasing fractal roughness G . Although values of secondary energy minimum for solid nanoparticles were small at both valleys and peaks at 200 mM, it further decreased for hollow nanoparticles with different interior fluids. The findings in the present study have important implications for the design and use of hollow nanoparticles in soil remediation and colloid assembly.

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