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Selective Synthesis of Different-Sized Gold Nanoclusters through HCl-Etching and -Growth Effect
Ting Huang,Zhi-hu Sun,Guo-qiang Pan*
Author NameAffiliationE-mail
Ting Huang National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Zhi-hu Sun National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Guo-qiang Pan* National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China gqpan@ustc.edu.cn 
Abstract:
Controllable syntheses of different-sized gold nanoclusters are of great significance for their fundamental science and practical applications.In this work,we achieve the controllable and selective syntheses of Au7 and Au13 clusters through adding HCl to the traditional Au11 synthetic route at different reaction time.Time-dependent mass spectra and UVVis spectra were employed to monitor these two HCl-directed processes,and revealed the distinct roles of HCl as an etchant or a growth promotor,respectively.Furthermore,parallel experiments on independent synthetic routes involving only non-chlorine H+(acetic acid) or Cl-(tetraethy lammonium chloride) instead of HCl were performed,which illustrated the main role of H+-etching and Cl--assisted growth in HCl-directed cluster synthetic routes.We propose the HCl-etching is mainly achieved via the H+ action to break the Au (I)-PPh3 part of clusters,while the HCl-promoted growth is realized via the attachment of Au-Cl species to the pre-formed clusters.
Key words:  Selective synthesis  Route control  HCl  Etching and growth effects
FundProject:This work was supported by the National Natural Science Foundation of China (No.11475176, No.U1632263, and No.21533007), and the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (No.11621063).
通过盐酸刻蚀和生长作用来选择性合成不同尺寸大小的金纳米团簇
黄婷,孙治湖,潘国强*
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DOI:10.1063/1674-0068/31/cjcp1707142
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