Fig. 3From: Exploring the Intrinsic Piezofluorochromic Mechanism of TPE-An by STS Technique a Typical STM image of TPE-An film on Si (001) substrate (100 × 100 nm). The given voltage was −1.2 V, and the set current was 1000 pA. b The surface height distribution curve of TPE-An film, which corresponds to the cross-section curve in Fig. 2a Back to article page