Controlled coassembly of dumbbell-like Au nanoparticles with a porous nitrogen doped carbon aerogel for cancer cell H2O2 detection

Abstract

The homogeneous dumbbell-like Au nanoparticles (DL-AuNPs) with large exposed active surfaces were obtained with a porous N-doped carbon aerogel (NCA). Such coassembly of DL-AuNPs with NCA (NCA@DL-AuNPs) had a large specific surface area (788 m2/g), rich mesopores, and a high N content (4.93 at%). The unique structures of NCA@DL-AuNPs yielded better electrocatalytic activity for the detection of H2O2 both in PBS and released from Hale cells than that of previously reported Au catalysts loaded on carbon materials, which demonstrates that such novel NCA@DL-AuNPs nanocomposite is promising for design of efficient nonenzymatic H2O2 biosensors.