Fig. 1: Characterizations of Bi2O2Se and its adsorption active sites. | Nature Communications

Fig. 1: Characterizations of Bi2O2Se and its adsorption active sites.

From: Molecularly specific detection towards trace nitrogen dioxide by utilizing Schottky-junction-based Gas Sensor

Fig. 1

a Cross-sectional HAADF-STEM image showing the Bi2O2Se grown on the SrTiO3 (001) substrate (scale bar: 1 nm). b The element distributions for the HAADF-STEM image (scale bar: 1 nm). The AFM images of Bi2O2Se surface (c; scale bar: 2 µm) and its zoom-in (d; scale bar: 400 nm). The profile in (d) shows 0.6-nm step-height of the Bi2O2Se terraces. The STM images presenting the Bi2O2Se surface without (e; scale bar: 5 nm) / with adsorbates (f; scale bar: 5 nm). The adsorbed O2 molecules are indicated with red boxes.

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