Seed-mediated synthesis of gold tetrahedra in high purity and with tunable, well-controlled sizes

Yiqun Zheng, Wenying Liu, Tian Lv, Ming Luo, Hefei Hu, Ping Lu, Sang Il Choi, Chao Zhang, Jing Tao, Yimei Zhu, Zhi Yuan Li, Younan Xia

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We report a facile synthesis of Au tetrahedra in high purity and with tunable, well-controlled sizes via seed-mediated growth. The success of this synthesis relies on the use of single-crystal, spherical Au nanocrystals as the seeds and manipulation of the reaction kinetics to induce an unsymmetrical growth pattern for the seeds. In particular, the dropwise addition of a precursor solution with a syringe pump, assisted by cetyltrimethylammonium chloride and bromide at appropriate concentrations, was found to be critical to the formation of Au tetrahedra in high purity. Their sizes could be readily tuned in the range of 30-60 nm by simply varying the amount of precursor added to the reaction solution. The current strategy not only enables the synthesis of Au tetrahedra with tunable and controlled sizes but also provides a facile and versatile approach to reducing the symmetry of nanocrystals made of a face-centered cubic lattice.

Original languageEnglish (US)
Pages (from-to)2635-2640
Number of pages6
JournalChemistry - An Asian Journal
Volume9
Issue number9
DOIs
StatePublished - Sep 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry

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