Electrochemiluminescence behaviors of Eu3+-doped CdS nanocrystals film in aqueous solution

被引：81

作者：

Deng, Li ^{[1
]}

Shan, Yun ^{[1
,2
]}

Xu, Jing-Juan ^{[1
]}

Chen, Hong-Yuan ^{[1
]}

机构：

[1] Nanjing Univ, State Key Lab Analyt Chem Life Sci, Sch Chem & Chem Engn, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Xiaozhuang Univ, Sch Biochem & Environm Engn, Nanjing 211171, Jiangsu, Peoples R China

来源：

NANOSCALE | 2012年 / 4卷 / 03期

基金：

中国国家自然科学基金;

关键词：

MAGNETIC SEMICONDUCTOR CLUSTERS; ELECTROGENERATED CHEMILUMINESCENCE; QUANTUM DOTS; ENERGY-TRANSFER; NANOPARTICLES; ZNO; HYDROLYSIS; EU3+; CDTE;

D O I：

10.1039/c1nr11470k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Eu3+ doped CdS nanocrystals (CdS:Eu NCs) were synthesized via a co-precipitation method. The doping of Eu3+ ions caused a 4-fold enhancement in electrochemiluminescence (ECL) intensity and more stable cathodic signals compared to pure CdS NCs. Such enhancement was mostly ascribed to doping-induced improvement in the stability of reduced NCs. A new emission peak around 620 nm was observed in ECL spectra of the doped NCs, which belongeded to the D-5(0) -> F-7(2) transition of Eu3+ ions in CdS NCs. Correspondingly, a pair of oxidation and reduction peaks occurred at +1.01 V and +0.61 V because of the formation of Eu3+-surface states complex when the CdS:Eu NCs solution underwent cyclic voltammogram scanning. Benefiting from the strong ECL emission of the doped NCs and high affinity of the doped Eu3+ ions to oxygen, the CdS:Eu NCs film showed a great oxygen-sensitivity. The intense red luminescence of the characteristic transitions of Eu3+ in CdS:Eu NCs would also have enormous potential in bioanlytical systems.

引用

页码：831 / 836

页数：6

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