中国物理B ›› 2016, Vol. 25 ›› Issue (4): 46103-046103.doi: 10.1088/1674-1056/25/4/046103

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Convenient synthesis of stable silver quantum dots with enhanced photoluminescence emission by laser fragmentation

Shuang Li(李爽), Ming Chen(陈明)   

  1. School of Physics, Shandong University, Jinan 250100, China
  • 收稿日期:2015-10-20 修回日期:2015-12-10 出版日期:2016-04-05 发布日期:2016-04-05
  • 通讯作者: Ming Chen E-mail:chenming@sdu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11575102, 11105085, 11275116, and 11375108) and the Fundamental Research Funds of Shandong University, China (Grant No. 2015JC007).

Convenient synthesis of stable silver quantum dots with enhanced photoluminescence emission by laser fragmentation

Shuang Li(李爽), Ming Chen(陈明)   

  1. School of Physics, Shandong University, Jinan 250100, China
  • Received:2015-10-20 Revised:2015-12-10 Online:2016-04-05 Published:2016-04-05
  • Contact: Ming Chen E-mail:chenming@sdu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11575102, 11105085, 11275116, and 11375108) and the Fundamental Research Funds of Shandong University, China (Grant No. 2015JC007).

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摘要： A new strategy for the facile synthesis of very stable and mono-dispersed silver (Ag) quantum dots (QDs) is developed by laser fragmentation of bulk Ag in water using polysorbate 80 as a dispersing and stabilizing agent. The surfactant plays an important role in the formation of size-controlled Ag nano-structures. The Ag QDs have excellent photo-stability of ～500 h and enhanced photoluminescence (PL) at 510 nm. This has significant implications for selective and ultrasensitive PL probes. Based on laser fragmentation in the biocompatible surfactant solution, our results have opened up a novel paradigm to obtain stable metal QDs directly from bulk targets. This is a breakthrough in the toxicity problems that arise from standard chemical fabrication.

关键词: size-controlled Ag nano-structures, pulsed laser fragmentation

Abstract: A new strategy for the facile synthesis of very stable and mono-dispersed silver (Ag) quantum dots (QDs) is developed by laser fragmentation of bulk Ag in water using polysorbate 80 as a dispersing and stabilizing agent. The surfactant plays an important role in the formation of size-controlled Ag nano-structures. The Ag QDs have excellent photo-stability of ～500 h and enhanced photoluminescence (PL) at 510 nm. This has significant implications for selective and ultrasensitive PL probes. Based on laser fragmentation in the biocompatible surfactant solution, our results have opened up a novel paradigm to obtain stable metal QDs directly from bulk targets. This is a breakthrough in the toxicity problems that arise from standard chemical fabrication.

Key words: size-controlled Ag nano-structures, pulsed laser fragmentation

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
52.38.Mf (Laser ablation)