title: Photoinduced cleaning of water-soluble dyes on patterned superhydrophilic/superhydrophobic substrates.
abstract: Herein we present a novel but simple method to fabricate photoinduced cleaning substrates with patterned superhydrophobic hierarchical silicon cone arrays (SCAs) and superhydrophilic TiO(2) nanorod clusters (TNCs). In our experiment, the photoinduced cleaning properties of the obtained substrate are investigated by repeatedly adsorbing and decomposing rhodamine B (RhB) molecules for at least six cycles. In addition, we demonstrate that the low-surface-energy coating on the superhydrophobic areas is stable, resulting in the high wettability contrast being well preserved during the renewal process. This straightforward method may open up new possibilities for the practical use of microchips with patterned superhydrophobic and superhydrophilic areas.
authors.affiliation: State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, PR China.
authors.forename: Xuemin
authors.initials: X
authors.lastname: Zhang
authors.forename: Junhu
authors.initials: J
authors.lastname: Zhang
authors.forename: Zhiyu
authors.initials: Z
authors.lastname: Ren
authors.forename: Xun
authors.initials: X
authors.lastname: Zhang
authors.forename: Tian
authors.initials: T
authors.lastname: Tian
authors.forename: Yunan
authors.initials: Y
authors.lastname: Wang
authors.forename: Fengxia
authors.initials: F
authors.lastname: Dong
authors.forename: Bai
authors.initials: B
authors.lastname: Yang
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008856:Microscopy, Fluorescence; D043942:Nanotubes / Q000737:chemistry / Q000648:ultrastructure; D055668:Photochemical Processes; D012235:Rhodamines / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry
chemical_list: D005456:Fluorescent Dyes; D012235:Rhodamines; C009495:titanium dioxide; D014025:Titanium; C029773:rhodamine B; D012825:Silicon