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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