Dual-Functional Janus Nanosheets With Cation Exchangeability And Thermo-Responsiveness Prepared Via Regioselective Modification Of K4nb6o17 Center Dot 3h(2)O

Dual-functional Janus nanosheets were prepared by growing poly(N-isopropylacrylamide-co-N-hydroxymethylacrylamide) chains on one face of individual negatively-charged nanosheets derived from K(4)Nb(6)O17 center dot 3H(2)O via surface-initiated atom transfer radical polymerization. They exhibited aggregation behavior in water upon heating based on the thermo-responsiveness of the poly(N-isopropylacrylamide-co-N-hydroxymethylacrylamide) chains and the intrinsic cation exchangeability of the unmodified face.