Microscale patterning of hydrophobic/hydrophilic surfaces by spatially controlled galvanic displacement reactions.
In this letter, we report the design and fabrication of different metal patterns for the realization of spatially controlled hydrophobic/hydrophilic regions with micrometer resolution. The fabrication procedure, based on a combination of lithographic techniques and wet-chemistry reactions (namely, spontaneous Galvanic displacement reactions) is reliable, undemanding, and highly versatile, allowing the achievement of precise spatial control along with the use of a wide variety of different materials.
Rizzello
L
L
National Nanotechnology Laboratory of CNR-INFM, IIT Research Unit, Via per Arnesano, 73100 Lecce, Italy.
Shankar
S Shiv
SS
Fragouli
D
D
Athanassiou
A
A
Cingolani
R
R
Pompa
P P
PP
D006046:Gold / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008832:Microchemistry; D049329:Nanostructures / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
D014867:Water; D012834:Silver; D006046:Gold; D012825:Silicon