S-1 Supplementary Information Anatase TiO 2 - a model system for large polaron transport Bixing Yan 1,2 , Dongyang Wan 1,2* , Xiao Chi 2,3 , Changjian Li 4 , Mallikarjuna Rao Motapothula 1 , Sonu Hooda 1 , Ping Yang 3 , Zhen Huang 1 , Shengwei Zeng 1 , Akash Gadekar Ramesh 1,2 , Stephen John Pennycook 4 , Andrivo Rusydi 1,2,3 , Ariando 1,2* , Jens Martin 2,6* , Thirumalai Venkatesan 1,2,4,5,7* 1 NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore. 2 Department of Physics, National University of Singapore, Singapore 117551, Singapore. 3 Singapore Synchrotron Light Source, National University of Singapore, Singapore 117603, Singapore. 4 Department of Material Science and Engineering, National University of Singapore, Singapore 117575, Singapore. 5 NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore. 6 Center for Advanced 2D Material, National University of Singapore, Singapore 117551, Singapore.