We report the synthesis of platinum telluride nanoparticles (Pt 3Te4 NPs) in the solution phase at room temperature using a template-assisted method. The dendrimeric aggregates formed are composed of several small units of Pt3Te4 NPs of ̃4 nm diameter. Tellurium nanowires (Te NWs) are used as the template and the reducing agent in the growth of NPs which occurs due to the galvanic replacement reaction between Te NWs and PtCl62-. Surface-enhanced Raman scattering (SERS) of the dispersed Pt3Te4 NPs was studied using crystal violet (CV) as the analyte. SERS sensitivity up to 10-8 M of CV was observed. The Raman enhancement factor (EF) of adsorbed CV on NP aggregates was calculated to be 1.74×105. The catalytic ability of the as-synthesized Pt3Te4 NPs for the reduction of 4-nitrophenol (4-NP) was studied. © 2010 American Chemical Society.