Supporting InformationUltra-high Efficient Degradation Activity of Single- and Few-layered MoSe2 through Piezo-Catalyst EffectMei-Hsuan Wu†, Jyun-Ting Lee†, Yun Jung Chung†, Masimukku Srinivaas, and Jyh-

Ming Wu*

Department of Materials Science and Engineering, National Tsing Hua University, 101, Section 2 Kuang Fu Road, Hsinchu 300, Taiwan.†These authors contributed equally to this work*Address correspondence to wujm@mx.nthu.edu.tw

Figure S1. (a) The 3D AFM image of the MoSe2 nanoflowers. (b) The pizeoresponse

image showing the bright and dark areas, which indicates the different polarization

orientation. (c) The corresponding 3D image showing the piezoelectric responsive

potential of the MoSe2 nanoflowers in voltage

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Figure S2. SEM images of (a) Commercial MoSe2 sheets, (b) TiO2 nanoparticles.

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