lectrical conductivity (2.87 × 105 S·m−1). The CNT@GC film achieved EMI SE of 60 dB at a thickness of 2 µm after post-acid treatment and high specific SE of 3.49 × 105 dB·cm2·g−1, with comprehensive properties surpassing those of the majority of previous shielding materials. Additionally, the CNT@GC film exhibited Joule heating capability, reaching a surface temperature of 135 °C at 3 V with a fast thermal response of about 0.5 s, enabling anti-icing/de-icing functionality. This work presented a methodology for constructing a robust CNT@GC film with high EMI shielding performance and exceptional Joule heating capability, demonstrating immense potential in wearable devices, defense, and aerospace applications.22:T532,Carbon nanotubes (CNTs) had room temperature response, large surface area, and excellent mechanical properties, making them favorable for the design of flexible, wearable, and portable gas sensors. However, CNTs were lacking in response and selective response to different gases, such as H₂S. Here, we demonstrated a flexible H₂S ppb-level gas sensor based on a carbon nanotube/amorphous Fe₂O₃ (CNT/Fe₂O₃) film at room temperature, which was fabricated via a simple one-step solvent-thermal method. The CNT/Fe₂O₃ film gas sensor exhibited a high selective response to H₂S (with a response of 55.1% to 100 ppb H₂S), rapid reversible response at room temperature (with a response time of ∼127 s to 100 ppb H₂S), and low limit of detection to about 2 ppb. Additionally, the CNT/Fe₂O₃ film maintained good sensing performance under various bending conditions and could be further fabricated into the fiber gas sensor device via wet stretching, retaining response at the ppb level (with a response of 18.6% to 100 ppb H₂S). This research on a flexible gas sensor device based on the CNT film/fiber opened up new possibilities for wearable portable electronic device applications.

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