<p>Smart textiles, along with flexible electronics and wearable technologies, have become integral to modern life, including healthcare and defense. The increasing demand for these innovations has emphasized the need for scalable, efficient, and reproducible manufacturing techniques. In response to this demand, a novel atmospheric pressure plasma jet (APPJ) technique has been developed to deposit various nanomaterials, including carbon nanotubes, graphene nanoplatelets, polyaniline, and iron chloride, onto flexible and delicate substrates such as paper and fabric. This cost-effective, single-step method offers significant advantages over conventional approaches by eliminating the need for post-processing while maintaining excellent compatibility with flexible surfaces. Plasma-deposited nanomaterials were compared with other samples deposited under similar gas flow and other experimental conditions. The results revealed higher density and superior conductivity of the plasma-treated coatings, with a sheet resistance of 3.32 kΩ/sq over a 1&#xa0;cm² area. In contrast, non-plasma-coated samples demonstrated a sheet resistance range of several hundreds of kΩ/sq for the same area. Furthermore, the plasma-coated fibers showed remarkable durability in non-ionic detergent solutions, confirming their potential in real-life applications. This advanced plasma-assisted deposition method can revolutionize the fabrication of conductive textiles, wearable electronics, sensors, supercapacitors, and other emerging technologies, providing a versatile platform for integrating electrical functionality into the next generation of flexible devices.</p> Graphical abstract <p></p>