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The state-of-the-art diabetes diagnosis is concerned with developing non-invasive nano-enabled exhaled breath-acetone detection strategies. This communication details the potential of polypyrrole (PPy)–Silver/silver chloride (Ag/AgCl) ternary nanocomposites (NCs) for monitoring low-trace of acetone in human breath for diabetes diagnosis. The PPy–Ag/AgCl NCs were synthesized through in situ chemical oxidative polymerization of aniline by silver nitrate in the presence of hydrochloric acid. The morphological analysis revealed the existence of spherical Ag/AgCl nanoparticles (diameter∼ 50 nm) embedded in PPy matrix of nano fibrillar morphology (diameter∼ 20 nm). The structural investigations confirm the co-existence of PPy, Ag and AgCl nanoparticles in the ternary nanocomposite. The NC exhibited manifold superior sensing performance towards low trace (as low as∼ 1 ppm) of breath-acetone with …