Retracted Article: Facile fabrication of water-dispersible AgInS2 quantum dots and mesoporous AgInS2 nanospheres with visible photoluminescence

Hui Jin; Rijun Gui; Zonghua Wang; Jianfei Xia; Min Yang; Feifei Zhang; Sai Bi

doi:10.1039/C5RA11545K

Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence†

Hui Jin,^a Rijun Gui,*^a Zonghua Wang,*^a Jianfei Xia,^a Min Yang,^a Feifei Zhang^a and Sai Bi^a

* Corresponding authors

^a Collaborative Innovation Center for Marine Biomass Fiber, Laboratory of Fiber Materials and Modern Textiles, The Growing Base for State Key Laboratory, College of Chemical Science and Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Qingdao University, Shandong 266071, China
E-mail: guirijun@qdu.edu.cn, wangzonghua@qdu.edu.cn
Fax: +86 532 85950873
Tel: +86 532 85950873

Abstract

A facile one-step method for preparing water-dispersible carboxylic acid-terminated AgInS₂ quantum dots (QDs) with near-infrared (NIR) emission was developed. In the presence of polyethylenimine, the as-prepared AgInS₂ QDs gathered together to form QDs-self-assemblies, followed by centrifugating to obtain QDs aggregates. After that, the resulting QDs aggregates were calcined at elevated temperature to yield AgInS₂ nanospheres. Experimental results confirmed that the AgInS₂ nanospheres exhibited a mesoporous structure and consisted of repeated units of AgInS₂ QDs. The mesoporous AgInS₂ nanospheres had photoluminescence (PL) in the visible region that was different from that of the original AgInS₂ QDs emitted in the NIR region. High PL stability and low cytotoxicity of the nanospheres were verified experimentally. These results further revealed the potential of mesoporous AgInS₂ nanospheres for biomedical application, especially serving as novel nanoprobes for in vitro and in vivo PL imaging.

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Retracted Article: Facile fabrication of water-dispersible AgInS₂ quantum dots and mesoporous AgInS₂ nanospheres with visible photoluminescence†

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