Well dispersed chitosangraphene oxide nanocomposites

Supporting information: Well-dispersed Chitosan/Graphene Oxide Nanocomposites Xiaoming Yang,1,3 Yingfeng Tu,1 Liang Li,2,3,* Songmin Shang, 3,* and Xiao-ming Tao3 College of Chemistry, Chemical Engineering and Materials Sciences, Soochow University, Suzhou 215123, China, Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, China Address correspondence to: msell08@163.com; tcshang@inet.polyu.edu.hk (b) C-C C-O 286.2eV Intensity (a u.) 284.6eV 280 C=O 287.8eV O-C=O 289.1eV (a) 284 288 292 Binding Energy (eV) Figure S1 XPS C 1s core-level spectra of graphite (a) and GO (b) Compared with the spectrum of graphite, that of GO indicates the presence of four types of carbon bonds: C–C (284.6 eV), C–O (286.2 eV), C=O (287.8 eV) and O–C=O (289.1 eV), as reported in Carbon 2009, 47, 493-499, J Am Chem Soc 2009, 131, 13490-13497, J Phys Chem B 2006, 110, 8535-8539, Chem Commun 2010, 46, 1112-1114 It is in agreement with the results of XRD Figure S2 TEM image of thin section of composite Transmission electron microscopy (TEM) images of thin section of wt% CS/GO film is shown in Figure S2 The curly black lines represent the cross-sections of the GO While GO platelets are randomly distributed along the film thickness, they tend to align parallel to the film surface, as reported in Chem Mater 2008, 20, 2066-2068, Small 2010, 6, 205-209