Fig. 5. (a) and (b) Preparation of GO membrane by two different spinning methods. Reproduced with permission from ref. 41. Copyright© 2013, American Association for the Advancement of Science. (c) Synthetic process of a novel GO membrane by LBL self-assembly method. Reprinted with permission from (ref. 67). Copyright (2009) American Chemical Society. (d) Ordered deposition of GO sheets by vacuum filtration; (e) the mechanism of physically packed GO nanosheets by vacuum filtration. Reproduced with permission from ref. 21. Copyright© 2014, American Association for the Advancement of Science.