期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 23, 期 8, 页码 4927-4934出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cp06355j
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG) within Collaborative Research Center Functional Microgels and Microgel Systems'' [SFB 985]
- Government of Russian Federation [02.A03.21.0011]
- Ministry of Science and Higher Education of the Russian Federation [075-15-2020-273]
- Russian Foundation for Basic Research [20-33-70242]
- RWTH Aachen University [bund0006]
The behavior of microgels at solid-liquid interfaces is influenced by the preparation method. Through a combination of experimentation and simulation, it was found that the driving force for deformation of microgels varies depending on the surface and deposition method, and the simulated equilibrium structure is retained after rehydration.
Soft matter at solid-liquid interfaces plays an important role in multiple scientific disciplines as well as in various technological fields. For microgels, representing highly interesting soft matter systems, we demonstrate that the preparation method, i.e. the way how the microgel is applied to the specific surface, plays a key role. Focusing on the three most common sample preparation methods (spin-coating, drop-casting and adsorption from solution), we performed a comparative study of the deformation behavior of microgels at the solid-liquid interface on three different surfaces with varying hydrophilicities. For in situ visualization of the deformation of pNIPMAM microgels, we conducted highly sensitive 3D super resolution fluorescence microscopy methods. We furthermore performed complementary molecular dynamics simulations to determine the driving force responsible for the deformation depending on the surface and the deposition method. The combination of experiments and simulations revealed that the simulated equilibrium structure obtained after simulation of the completely dry microgel after deposition is retained after rehydration and subsequent fluorescent imaging.
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