Wearable pressure sensors show significant potential in areas such as health monitoring, electronic skin and human–computer interaction. However, achieving a balance between a wide sensing range and high sensitivity while simultaneously reducing manufacturing costs and simplifying fabrication processes remains a significant challenge for wearable pressure sensors. In this study, pressure sensors based on an MXene/Ag NFs coated cotton fabric (MACF) were prepared by a simple dip-coating technique. The hydroxyl groups in the cotton fabric interact with the hydrophilic groups on the MXene nanosheets, promoting strong adhesion between the two materials and forming a practical conductive pathway. The MACF sensor adopts a sandwich structure, demonstrating excellent performance, including a wide sensing range (0–60 kPa), high sensitivity (1.45 kPa⁻¹, 0–10 kPa), and stable responses over 410 cycles. The working mechanism of the MACF sensor is discussed in detail. Notably, the sensor maintains stable sensing performance under extreme humidity (40–80 RH%) and temperature conditions (20–100 °C). Furthermore, the sensor successfully detects and differentiates various human physiological signals, such as finger movements and wrist pulses. This study presents a simple fabrication method that achieves a balance between sensitivity and sensing range in cotton fabric-based sensors, demonstrating promising potential for applications in flexible wearable devices, electronic skins, and bionic robots.

The rapid dissipation of soft metal lubricants would deteriorate the self-lubricating properties of the coatings at elevated temperatures. In this study, the core-shell structured Mo@Ag@Ni particles were prepared via electroless plating to suppress the rapid dissipation of Ag and facilitate tribochemical reactions at high temperatures. The NiCrAlY-Mo@Ag@Ni composite coating was sprayed on the substrate of Inconel 718 alloy using atmospheric plasma spraying technology. The results of this study show that the structural design of Mo@Ag@Ni can enhance the bonding strength of the particle interface, resulting in a high microhardness of approximately 332.2 HV. During high-temperature friction tests, Mo@Ag@Ni can provide excellent tribological properties by promoting the silver molybdate formation on the worn surface. At 800 °C, the friction coefficient and wear rate are only about 0.32 and 1.58 × 10⁻⁵ mm³N⁻¹m⁻¹, respectively. Moreover, the Ni shell layer can inhibit the rapid diffusion of Ag and provide sufficient Ag₂O to maintain the continuity of Ag₂MoO₄ lubricating film, which endows the coating with a longer lubrication life. Over multi-thermal cycles, the friction coefficient and wear rate constantly maintain at about 0.3 and 2.5 × 10⁻⁵ mm³N⁻¹m⁻¹, respectively.