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Lotus-Like Water Repellency of Gas-Phase-Synthesized Graphene
journal contribution
posted on 2022-04-21, 12:06 authored by M. Weston Miller, Makenna Parkinson, Albert DatoThe
ability of lotus leaves to repel water is desired in numerous
applications, such as self-cleaning surfaces, biomedical devices,
and naval vessels. Creating materials that mimic the hierarchical
structure and surface chemistry of lotus leaves requires multistep
processes that are impractical for the mass production of nonwettable
products. Superhydrophobic surfaces have been created using graphene.
However, graphene sheets obtained through graphite exfoliation or
deposition on substrates are not superhydrophobic and require additional
processes to achieve lotus-like water repellency. In this work, we
show that graphene produced in the gas phase is inherently superhydrophobic.
Gas-phase-synthesized graphene (GSG) and lotus leaves have fundamentally
different structures, yet water droplets on both materials exhibit
comparable contact angles, roll-off angles, and bouncing characteristics.
Furthermore, hydrophilic surfaces become superhydrophobic when covered
with GSG. The substrate-free synthesis of GSG is straightforward and
sustainable, which could enable the manufacturing of a diverse range
of water-repellent technologies.
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require additional processesfundamentally different structuresgraphene sheets obtainedcreated using grapheneyet water dropletslike water repellencysynthesized graphenegraphene producedrepel watersurface chemistryrepellent technologiesnumerous applicationsnonwettable productsnaval vesselsmass productionhierarchical structuregraphite exfoliationfree synthesisdiverse rangecreating materialscould enablecleaning surfacesbouncing characteristicsbiomedical devices
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