Tris Base Assisted Synthesis of Monodispersed Citrate-capped Gold Nanospheres with Tunable Size Xuefei Lu, Anirban Dandapat, Youju Huang*, Lei Zhang, Yun Rong, Liwei Dai, Yoel Sasson, Jiawei Zhang, Tao Chen* RSC Adv., 2016, Accepted Manuscript