Single phased and well-crystallized beta-AgCuPO4 thin films were grown by pulsed laser deposition in an oxygen atmosphere (PO2 = 3 x 10(-1) mBar) at a temperature of about 500 degrees C. Their potentiometric response was tested in silver containing solutions. It obeys a Nernstian voltage variation with a fast response time (< 60 s), a good reversibility and present a good selectivity with the silver in absence of copper and/or mercury cations. The conductivity of this material has been evaluated to better understand the response of this material. (c) 2004 Elsevier Ltd. All rights reserved.