In this paper, we report on the one-step preparation of Ag nanoparticle (AgNP)-decorated coordination polymer nanobelts, carried out by direct mixing of an aqueous AgNO3 solution and a N,N-dimethylformamide (DMF) solution of 4,4'-bipyridine (BPD) at room temperature. The construction of an enzymeless H2O2 sensor using such nanocomposites with a detection limit of 0.9 mu M is also demonstrated. (C) 2011 Elsevier Ltd. All rights reserved.