ArticleNano letters2024
Nanoscopic Interfacial Hydrogel Viscoelasticity Revealed from Comparison of Macroscopic and Microscopic Rheology.
Article in Nano letters, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Programmable Self-Assembly of Traditional Chinese Medicine (TCM) Monomers: From Molecular Mechanisms to Multifunctional Nanomedicine.International journal of nanomedicine · 2026Review
- Hydrogel-based systems with nanoparticle and microencapsulation for food preservation: Preparation, characterization, and application.Food chemistry: X · 2026Review
- Tuning Nanostructure of Gels: From Structural and Functional Controls to Food Applications.Gels (Basel, Switzerland) · 2025Review
- Topological linking determines elasticity in limited valence networks.Nature materials · 2025Article
- High-throughput Mucus Microrheology for Phenotyping and Disease Modeling.bioRxiv : the preprint server for biology · 2025Article
Corrections and comments
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Authors and funding
5 authors.
Funding
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Abstract
Deviations between macrorheological and particle-based microrheological measurements are often considered to be a nuisance and neglected. We study aqueous poly(ethylene oxide) (PEO) hydrogels for varying PEO concentrations and chain lengths that contain microscopic tracer particles and show that these deviations reveal the nanoscopic viscoelastic properties of the particle-hydrogel interface. Based on the transient Stokes equation, we first demonstrate that the deviations are not due to finite particle radius, compressibility, or surface-slip effects. Small-angle neutron scattering rules out hydrogel heterogeneities. Instead, we show that a generalized Stokes-Einstein relation, accounting for an interfacial shell around tracers with viscoelastic properties that deviate from bulk, consistently explains our macrorheological and microrheological measurements. The extracted shell diameter is comparable to the PEO end-to-end distance, indicating the importance of dangling chain ends. Our methodology reveals the nanoscopic interfacial rheology of hydrogels and is applicable to different kinds of viscoelastic fluids and particles.
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Registered trials
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