Understanding the petal effect: Wetting properties and surface structure of natural rose petals and rose petal-derived surfaces
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Parra Vicente, Sergio; Ibáñez Ibáñez, Pablo Francisco; Cabrerizo Vílchez, Miguel Ángel; Sánchez Almazo, Isabel María; Rodríguez Valverde, Miguel Ángel; Montes Ruiz-Cabello, Francisco JavierEditorial
Elsevier
Materia
Petal surfaces Drop retention Templating
Date
2024-03-04Referencia bibliográfica
Parra-Vicente, Sergio, et al. Understanding the petal effect: Wetting properties and surface structure of natural rose petals and rose petal-derived surfaces. Colloids and Surfaces B: Biointerfaces 236 (2024) 113832 [10.1016/j.colsurfb.2024.113832]
Sponsorship
Project PID2020–116082GB-I00 funded by MCIN/ AEI/10.13039/501100011033; Margarita Salas grant (Ministerio de Universidades, Next Generation EU); Funding for open access charge: Universidad de Granada/CBUA.Abstract
The petal effect is identified as a non-wetting state with high drop adhesion. The wetting behavior of petal
surfaces is attributed to the papillose structure of their epidermis, which leads to a Cassie-Baxter regime combined
with strong pinning sites. Under this scenario, sessile drops are pearl shaped and, unlike lotus-like surfaces,
firmly attached to the surface. Petal surfaces are used as inspiration for the fabrication of functional parahydrophobic
surfaces such as antibacterial or water-harvesting surfaces. In this work, two types of rose petals
were replicated by using a templating technique based in Polydimethylsiloxane (PDMS) nanocasting. The
topographic structure, the condensation mechanism under saturated environments and the wetting properties of
the natural rose petal and their negative and positive replicas were analyzed. Finally, we performed prospective
ice adhesion studies to elucidate whether petal-like surfaces may be used as deicing solutions.