Layer-by-layer self-assembly and disassembly of single charged inorganic small molecules: towards surface patterning
Literature Information
Mengjiao Cheng, Chao Jiang, Zhiyi Ding, Yajun Zhang, Yu Fu, Feng Shi
The patterning of layer-by-layer (LbL) polyelectrolyte multilayers with metal ions is important for the facile fabrication of circuits or selective catalysis. The strategy includes two issues: the incorporation of metal ions and their controlled assembly–disassembly, which require a good understanding of the assembly mechanism. Therefore, we explored the LbL assembly between a polycation, poly-(diallyldimethylammonium chloride) (PDDA) and an inorganic single charged molecule, [AuCl4]−, which could assemble at pH = 3.7 and disassemble at lower pH values. Moreover, we have demonstrated that the driving force in the assembly is a ligand-to-metal charge transfer interaction. Combining the controlled assembly–disassembly of PDDA–[AuCl4]− multilayers and photolithography, we obtained a surface pattern of PDDA–[AuCl4]− multilayers.
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