title: Versatile surface micropatterning and functionalization enabled by microcontact printing of poly(4-aminostyrene).
abstract: Microcontact printing (μCP) of polyelectrolytes is a facile and powerful method for surface micro/nanopatterning and functionalization. Poly(4-aminostyrene) (PAS) is a polyelectrolyte that can be converted to aryldiazonium salt and exhibits pH-dependent hydrophobicity. Here we demonstrate μCP of PAS and the expansion of this technique in various directions. First, the microcontact-printed PAS can be diazotized to micropattern biomolecules including DNA and protein and nanomaterials including single-walled carbon nanotubes and gold nanoparticles. Second, the diazotized PAS enables μCP of a metallic structure on a carbon surface. Third, the hydrophobic nature of PAS at the neutral pH allows the microcontact-printed PAS-based polyelectrolyte multilayer to be used as masks for wet etching. Lastly, this technique allows facile fabrication of highly engineered microparticles with a unique structure. Overall, this work has established a novel μCP platform with various potential applications.
authors.affiliation: Department of Chemical and Biomedical Engineering and ‡Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering, Florida State University , Tallahassee, Florida 32310, United States.
authors.forename: Zhibin
authors.initials: Z
authors.lastname: Wang
authors.forename: Junfei
authors.initials: J
authors.lastname: Xia
authors.forename: Sida
authors.initials: S
authors.lastname: Luo
authors.forename: Peipei
authors.initials: P
authors.lastname: Zhang
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Xiao
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.forename: Jingjiao
authors.initials: J
authors.lastname: Guan
mesh_terms: D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D015394:Molecular Structure; D010316:Particle Size; D011137:Polystyrenes / Q000737:chemistry*; D011327:Printing; D013499:Surface Properties
chemical_list: D011137:Polystyrenes