Wang Z1, Xia J, Luo S, Zhang P, Xiao Z, Liu T, Guan J.
Langmuir. 2014 Nov 11;30(44):13483-90. doi: 10.1021/la503393j. Epub 2014 Oct 31.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. Read More