Evaporation of a Reactive Nanofluid Sessile Drop: <i>Capturing Rapid Emergence of Surface Crystals with In Situ Synchrotron X-ray Diffraction</i>.

ABSTRACT: Mechanisms for surface pattern formation from evaporation of a reactive nanofluid sessile drop are not well understood. In contrast to the coffee-ring effect from inert particles, rapid chemical and morphological transformation of reactive nanoparticles upon rapid evaporative drying are challenging to probe experimentally. Here, using grazing-incidence X-ray surface scattering, the nanostructure of nascent surface patterns has been probed as a ZnO nanofluid sessile drop rapidly dries. The high temporal resolution enabled by the high flux of synchrotron X-rays allows the observation of the emergence of Zn(OH)₂ surface crystals from the onset of evaporation and their rapid evolution into the final residual surface pattern, via transient layered complexes evident from

SUBMITTER: Wasik P 

PROVIDER: S-EPMC12288063 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature