title: Insights into the effect of surface ligands on the optical properties of thiolated Au25 nanoclusters.
abstract: An abnormal optical absorption at about 780 and 980 nm was observed for Au25 nanoclusters (NCs) protected by negatively charged thiolate ligands collocating with positively or neutrally charged thiolate ligands, largely due to the resultant surface charge anisotropy on the NC surface which could induce structural distortions of the thiolated Au25 NCs.
authors.affiliation: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore. chexiej@nus.edu.sg.
authors.forename: Xun
authors.initials: X
authors.lastname: Yuan
authors.forename: Nirmal
authors.initials: N
authors.lastname: Goswami
authors.forename: Weiliang
authors.initials: W
authors.lastname: Chen
authors.forename: Qiaofeng
authors.initials: Q
authors.lastname: Yao
authors.forename: Jianping
authors.initials: J
authors.lastname: Xie