AI 中文总结
该研究发现基底接触角会调控微凝胶的水合形状、刚度，进而影响朗缪尔-布洛杰特沉积单层的干燥重排与最终组装结构，为界面自组装及转移结构的调控提供了关键机制。
AI 中文摘要
软微凝胶被广泛用作二维组装的可变形构建单元，但固体基底在界面沉积后常被视为被动支撑。本文表明，基底润湿性会在干燥前对软微凝胶产生力学预调控。通过液体中力体积原子力显微镜，研究发现相同微凝胶会根据基底接触角呈现显著不同的水合形状与刚度分布：疏水基底诱导微凝胶铺展、扁平化及内部硬化，而亲水基底则保留更高、更软且接触面积更小的微凝胶。这些单微凝胶状态可解释朗缪尔-布洛杰特（Langmuir-Blodgett）沉积的单层在干燥过程中的响应。在亲水基底上，观察到的组装体符合柔软且弱固定的微凝胶在浸没-毛细管力作用下重排，产生不同的冠-冠、核-核接触状态及明显的等结构转变；在疏水基底上，扁平化且硬化的微凝胶固定性更强，可能抑制毛细管驱动的重排，很大程度上保留转移后的界面组装结构。这些发现确立了基底调控的微凝胶力学性能，是连接界面自组装与转移干燥后最终结构的缺失环节。
英文摘要
Soft microgels are widely used as deformable building blocks for two-dimensional assemblies, yet solid substrates are often treated as passive supports after interfacial deposition. Here, we show that substrate wettability mechanically preconditions soft microgels before drying. Using in-liquid force-volume atomic force microscopy, we find that the same microgels adopt markedly different hydrated shapes and stiffness profiles depending on substrate contact angle: hydrophobic substrates induce spreading, flattening, and internal stiffening, whereas hydrophilic substrates preserve taller, softer microgels with smaller contact areas. These single-microgel states can explain how Langmuir-Blodgett-deposited monolayers respond during drying. On hydrophilic substrates, the observed assemblies are consistent with soft and weakly immobilized microgels rearranging under immersion-capillary forces, producing distinct corona-corona and core-core contact states and an apparent isostructural transition. On hydrophobic substrates, the flattened and stiffened microgels are more strongly immobilized, likely suppressing capillary-driven rearrangements and largely preserving the transferred interfacial assembly structure. These findings establish substrate-controlled microgel mechanics as the missing link between interfacial self-assembly and the final structures observed after transfer and drying.
