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Figure 10. Gas sensor based on SP-structured SnO₂. (A) Schematic illustration of the sensor structure; (B) Single-cycle response curves of six representative gases under pulse heating; (C) Surface states of the metal oxide semiconductor during the gas sensing test; (D) Sensing mechanism toward gas molecules; (E) Extraction of overshoot peak data and gas recognition based on a convolutional neural network model. This figure is reproduced under the terms of the CC BY-NC-ND 4.0 License^[7]. Copyright 2026, The Authors. IDE: interdigitated electrode; MEMS: microelectromechanical systems; EDL: electron depletion layer; SP: single primitive.