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Byproduct-induced in-situ formation of gold colloidal superparticles

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Abstract

Current work presents a simple and efficient method for the preparation of gold superparticles. The self-assembly of gold nanoparticles into colloidal superparticles was realized in-situ during the preparation of nanoparticles when a type of thiol molecules were used as ligands. Further investigation reveals that t-butylamine hydrochloride, an ionic byproduct generated during the redox reaction of precursors, plays a key role in the formation of gold superparticles. The polarity of monolayers made from these ligands on the nanoparticle surface allows the interaction of nanoparticles and the ionic byproduct, which is indispensable for the superparticle formation.

中文摘要

本文提供了一个简单有效的方法制备超级金纳米粒子.制备金纳米粒子的过程中加入一类巯基配体, 得到的金纳米粒子会自聚集形成超级金纳米粒子.进一步的研究发现,一个氧化还原反应的副产物叔丁胺盐酸盐在形成超级金纳米粒子的过程中起到了重要的作用.附着于金纳米粒子表面的配体与叔丁胺盐酸盐相互作用,促进了超级金纳米粒子的形成.

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Authors and Affiliations

  1. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore

    Shaojue Wu, Chung Yen Ang, Zhong Luo, Si Yu Tan, Kim Truc Nguyen & Yanli Zhao

  2. School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore

    Yanli Zhao

Authors
  1. Shaojue Wu
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  2. Chung Yen Ang
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  3. Zhong Luo
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  4. Si Yu Tan
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  5. Kim Truc Nguyen
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  6. Yanli Zhao
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Corresponding author

Correspondence to Yanli Zhao.

Additional information

Shaojue Wu is currently a fourth-year PhD student under the supervision of Associate Professor Yanli Zhao at Nanyang Technological University, Singapore. His research focuses on the preparation and self-assembly of metal nanoparticles for sensing applications.

Yanli Zhao is currently an Associate Professor at Nanyang Technological University, Singapore. He received his BSc degree in chemistry and PhD degree in physical chemistry under the supervision of Prof. Yu Liu from Nankai University in 2000 and 2005, respectively. He was a postdoctoral scholar in Prof. Sir Fraser Stoddart’s group from Oct. 2005 to Nov. 2008, and from Dec. 2008 to Dec. 2009 in Prof. Jeffrey Zink’s group at the University of California Los Angeles, and subsequently at Northwestern University from Jan. 2010 to Aug. 2010. He has published over 190 peer-reviewed scientific papers, and received several awards including the TR35@Singapore Award in 2012 and Singapore National Research Foundation Fellowship in 2010. His current research focuses on the development of integrated systems for diagnostics and therapeutics, as well as porous materials for gas storage and catalysis.

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Wu, S., Ang, C.Y., Luo, Z. et al. Byproduct-induced in-situ formation of gold colloidal superparticles. Sci. China Mater. 58, 860–866 (2015). https://doi.org/10.1007/s40843-015-0094-6

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  • DOI: https://doi.org/10.1007/s40843-015-0094-6

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