光学学报, 2015, 35 (8): 0816005, 网络出版: 2015-07-29
Nd3+掺杂的NaYF4∶Yb,Er/Tm 上转换纳米颗粒的光谱分析
Research on Photoluminescence of Nd3+ Doped NaYF4:Yb,Er/Tm Upconversion Nanoparticles
材料谱 上转换纳米颗粒 Nd3+掺杂 核壳结构 荧光光 materials upconversion nanoparticles Nd3+ dopant core/shell structure photoluminescence spectra
摘要
生物组织对980nm波长的光有较强的吸收,限制了Yb/Er或Yb/Tm共掺的NaYF4上转换纳米颗粒在生物方面的应用范围.通过对NaYF4∶Yb,Er/Tm纳米颗粒进行Nd掺杂,获得可在800 nm波长的激光激发下产生荧光的纳米颗粒.对多种不同形貌的Nd掺杂纳米颗粒的荧光光谱的研究表明,具有核壳结构的NaYF4∶Yb3+20%,Er3+2%@NaYF4∶Nd3+20%纳米颗粒在800 nm激光激发下的荧光强度最高,基本上与NaYF4∶Yb3+20%,Er3+2%纳米颗粒在980 nm激光激发下的荧光强度相当,其强度比NaYF4∶Yb3+20%,Er3+2%,Nd3+20%纳米颗粒提高了600倍以上.分析表明,Nd掺杂导致的淬灭效应主要来自于Nd和光敏剂Yb之间的作用,而不是与活化剂Er/Tm 之间的作用.
Abstract
Strong absorption of 980 nm wavelength light by biological tissues results in the limited application of Yb/Er or Yb/Tm doped NaYF4 upconversion nanoparticles.800 nm excited NaYF4∶Yb,Er/Tm nanoparticles doped with Nd3 + ions are reported.By comparing the photoluminescence spectra of different structured nanoparticles incorporated with Nd3 + ions,it is found that the emission intensity by 800 nm laser of core/shell structured NaYF4∶Yb3 + 20%,Er3 + 2%@NaYF4∶Nd3 + 20% nanoparticles is the highest,which is close to the emission intensity of NaYF4∶Yb3 + 20% ,Er3 + 2% nanoparticles excited by 980 nm laser.The emission intensity is enhanced by more than 600 times compared with that of NaYF4∶Yb3 + 20%,Er3 + 2%,Nd3 + 20% nanoparticles.It is proved that the quench effect due to Nd incorporation is mainly related to the interaction between Nd3 + ions and the sensitizer Yb3+ ions,but not that between Nd3+ ions and the activator Er3+/Tm3+ ions.
叶帅, 宋军, 陈林春, 王东, 彭晓, 屈军乐. Nd3+掺杂的NaYF4∶Yb,Er/Tm 上转换纳米颗粒的光谱分析[J]. 光学学报, 2015, 35(8): 0816005. Ye Shuai, Song Jun, Chen Linchun, Wang Dong, Peng Xiao, Qu Junle. Research on Photoluminescence of Nd3+ Doped NaYF4:Yb,Er/Tm Upconversion Nanoparticles[J]. Acta Optica Sinica, 2015, 35(8): 0816005.
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