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All-Aqueous Soft Milli-swimmers
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-07-23 , DOI: 10.1021/acsami.4c05914
Chunmei Zhou 1, 2 , Xin Tang 1, 2 , Rui Shi 3 , Caihong Liu 1, 2 , Pingan Zhu 4 , Liqiu Wang 5
Affiliation  

Microscale swimmers are attractive for targeted drug delivery, noninvasive microsurgery and environmental remediation at different length scales, among which, Marangoni-based swimmers have garnered considerable attention due to their independence of external energy supply. However, applications of most existing chemical swimmers are limited by complex fabrication, high cost, utilization of organic (or even toxic) solvents, poor motility performance, and lack of controllability. To address these challenges, we propose an approach for all-aqueous soft milli-swimmers that utilizes biodegradable hydrogels and biocompatible fuels. This innovative method achieves swimmer body generation and fuel loading in one step by simply dripping one aqueous solution into another, saving fabrication time and minimizing fuel loss during transfer. These all-aqueous soft milli-swimmers have rove beetle-like self-propulsion, which stores low-surface-energy compounds within their body for propulsion on liquid surfaces. Isotropic and anisotropic all-aqueous soft milli-swimmers are formed with precise control over their dimension, morphology, and movement velocity. Through their motion within engineered channels, intricate labyrinths, dynamic air−liquid interfaces, and collective self-assemblies, their remarkable adaptability in complex aqueous environments is demonstrated. Furthermore, the integration of functional nanoparticles endows these all-aqueous milli-swimmers with multifunctionality, expanding their applications in cargo transportation, sensing, and environmental remediation.

中文翻译:


全水性 Soft Milli 游泳者



微型游泳运动员对于不同长度尺度的靶向药物递送、无创显微手术和环境修复具有吸引力,其中,马兰戈尼游泳运动员因其独立于外部能源供应而受到广泛关注。然而,大多数现有化学游泳器的应用受到制造复杂、成本高、使用有机(甚至有毒)溶剂、运动性能差和缺乏可控性的限制。为了应对这些挑战,我们提出了一种利用可生物降解水凝胶和生物相容性燃料的全水性软 milli-swimder 的方法。这种创新方法只需将一种水溶液滴入另一种水溶液中,即可一步完成游泳体的生成和燃料加载,从而节省制造时间并最大限度地减少转移过程中的燃料损失。这些全水性软 milli-swimder 具有类似甲虫的自推进功能,可在体内储存低表面能化合物,以便在液体表面推进。各向同性和各向异性全水性软 milli-swimr 的形成需要精确控制其尺寸、形态和运动速度。通过它们在工程通道、错综复杂的迷宫、动态气液界面和集体自组装中的运动,证明了它们在复杂水性环境中的非凡适应性。此外,功能性纳米颗粒的集成赋予了这些全水性毫游泳器多功能性,扩大了它们在货物运输、传感和环境修复方面的应用。
更新日期:2024-07-23
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