Water binding and hygroscopicity in π-conjugated polyelectrolytes oleh Cindy Guanyu Tang, Mazlan Nur Syafiqah, Qi-Mian Koh, Mervin Chun-Yi Ang, Kim-Kian Choo, Ming-Ming Sun, Martin Callsen, Yuan-Ping Feng, Lay-Lay Chua, Rui-Qi Png, Peter K. H. Ho