Author: Huaqi Huang

0000000000825783

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Huaqi Huang

All-thiol-stabilized Ag44 and Au12Ag32 nanoparticles with single-crystal structures

Noble metal nanoparticles stabilized by organic ligands are important for applications in assembly, site-specific bioconjugate labelling and sensing, drug delivery and medical therapy, molecular recognition and molecular electronics, and catalysis. Here we report crystal structures and theoretical analysis of three Ag44(SR)30 and three Au12Ag32(SR)30 intermetallic nanoclusters stabilized with fluorinated arylthiols (SR=SPhF, SPhF2 or SPhCF3). The nanocluster forms a Keplerate solid of concentric icosahedral and dodecahedral atom shells, protected by six Ag2(SR)5 units. Positive counterions in the crystal indicate a high negative charge of 4(-) per nanoparticle, and density functional theory…

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Plasmonic twinned silver nanoparticles with molecular precision

Determining the structures of nanoparticles at atomic resolution is vital to understand their structure–property correlations. Large metal nanoparticles with core diameter beyond 2 nm have, to date, eluded characterization by single-crystal X-ray analysis. Here we report the chemical syntheses and structures of two giant thiolated Ag nanoparticles containing 136 and 374 Ag atoms (that is, up to 3 nm core diameter). As the largest thiolated metal nanoparticles crystallographically determined so far, these Ag nanoparticles enter the truly metallic regime with the emergence of surface plasmon resonance. As miniatures of fivefold twinned nanostructures, these structures demonstrate a subtle dis…

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CCDC 1496141: Experimental Crystal Structure Determination

Related Article: Huayan Yang, Yu Wang, Xi Chen, Xiaojing Zhao, Lin Gu, Huaqi Huang, Juanzhu Yan, Chaofa Xu, Gang Li, Junchao Wu, Alison J. Edwards, Birger Dittrich, Zichao Tang, Dongdong Wang, Lauri Lehtovaara, Hannu Häkkinen, Nanfeng Zheng|2016|Nat.Commun.|7|12809|doi:10.1038/ncomms12809

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