Chen C.-HI-CHUN CHENGJIAN-ZHANG CHEN2022-11-162022-11-16202224680230https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126986729&doi=10.1016%2fj.surfin.2022.101901&partnerID=40&md5=df81a1590d8a3b44e0dfa728bddcc948https://scholars.lib.ntu.edu.tw/handle/123456789/625327The present study uses a facile method to produce a superhydrophobic polydimethylsiloxane (PDMS) surface with sandpaper molding and convert it from petal effect surface to lotus effect surface. This process increases the water contact angle (WCA) from 116.4° to 150.3°. The sandpaper-molded PDMS exhibits high adhesion for water droplets, that is, it has a petal effect surface. With perfluorodecyltrichlorosilane (PFDTS) solution immersion treatment of the PDMS, the contact angle hysteresis (CAH) reduces from 20.3° to 8.2° as the sliding angle (SA) reduces to 4°, that is, it has a lotus effect surface. This study presents a facile method to convert a petal effect surface to a lotus effect one for a rough PDMS surface. The chemical stability of fluorocarbons was tested in a solvent bath with 10 min ultrasonication. The results show that PFDTS can be grafted on sandpaper-molded PDMS surfaces without plasma pretreatment. © 2022Lotus effect; Perfluorodecyltrichlorosilane; Petal effect; Polydimethylsiloxane; Sandpaper; Superhydrophobic surfacejournal article10.1016/j.surfin.2022.1019012-s2.0-85126986729