▎ 摘　　要

An effective and facile in situ electroless deposition approach has been developed for growing high-quality Prussian blue nanocubes on the surface of graphene oxide (PBNCs/GO) in a controlled manner. The resulting hybrids are characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared, ultraviolet visible, X-ray diffraction and electrochemical techniques. The electrochemical behavior on the modified electrode is discussed in detail. A linear calibration of the biosensor is obtained in the range of 0.002-2.8 mM with a detection limit of 0.48 mu M. The response is within less than 5 s and the detection sensitivity is 2502 mu A mM(-1) cm(-2). The proposed approach allows simple and controlled preparation of transition metal hexacyanoferrate nanocrystals/graphene oxide and is promising for the study of unique shape-, size-, and structure- dependent properties for optoelectronic, magnetic, and electrocatalytic applications.