“One‐Pot” In Situ Formation of Gold Nanoparticles within Poly(acrylamide) Hydrogels

Natalya A. Dolya, Oscar Rojas, Sabine Kosmella, Brigitte Tiersch, Joachim Koetz, Sarkyt E. Kudaibergenov

2013

DOI 10.1002/macp.201200727

Data confidence 70 medium

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Abstract

Abstract This paper focuses on two different strategies to incorporate gold nanoparticles (AuNPs) into the matrix of polyacrylamide (PAAm) hydrogels. Poly(ethyleneimine) (PEI) is used as both reducing and stabilizing agent for the formation of AuNPs. In addition, the influence of an ionic liquid (IL) (i.e., 1‐ethyl‐3‐methylimidazolium ethylsulfate) on the stability of the nanoparticles and their immobilization in the hydrogel is investigated The results show that AuNPs surrounded by a shell containing PEI and IL, synthesized according to the “one‐pot” approach, are much better immobilized within the PAAm hydrogel. Hereby, the IL is responsible for structural changes in the hydrogel as well as the improved stabilization and embedding of the AuNPs into the polymer gel matrix. magnified image