writer：Meiwen Peng, Peng Xiao, Youju Huang*, Jiaming Chen, Zhenzhong Liu, Zhidong Xiao, and Tao Chen*
keywords：PEI, Microcontact Printing, Surface Patterning
source：期刊
specific source：JMCC, 2015, 3, 8659-8664
Issue time：2015年
Multifunctional polymeric patterning surfaces are of significant importance for numerous surface-based researches. We demonstrated that commerical polymer of polyethylenimine (PEI) with rich amino groupscan be used as a versatile ink for the direct fabrication of PEI patterning surfaces viasupramolecular interaction between amino in PEI and -OH on silicon wafer induced by microcontact printing (μCP). The thickness and shapes of the formed PEI surfaces can be finely tuned by changing the molecular weight and/or concentration of PEI. The obtained polymeric patterning surfaces could be amplified further to grow other polymersas brushes, or be explored as novel surface-enhanced Raman scattering (SERS) active material by electrostatic adsorption with negative charged gold nanoparticles (AuNPs).