Aqueous synthesis of high bright Ag2Se-ZnSe quantum dots with tunable near-infrared emission

作者：Che, Dongchen; Ding, Di; Wang, Hongzhi^*; Zhang, Qinghong; Li, Yaogang^*

来源：Journal of Alloys and Compounds, 2016, 678: 51-56.

DOI：10.1016/j.jallcom.2016.03.172

• Quantum dots
• Ag2Se-ZnSe
• Tunable luminescence
• Near-infrared emission
• Aqueous synthesis

Efficient aqueous synthetic methods for near-infrared quantum dots as bioimaging agents are urgently required. In this work, a simple and fast synthesis of highly luminescent, near-infrared Ag2Se quantum dots (QDs) in aqueous media is reported. The method avoids high temperature, pressure and organic solvents to directly generate water-dispersible Ag2Se QDs. The photoluminescence emission of Ag2Se QDs ranges from 835 to 940 nm by different Ag:Se molar ratio. Using the ZnSe as a shell, the quantum yield reaches up to 42%. The Ag2Se-ZnSe QDs with high quantum yield, near-infrared and low cytotoxic could be used as good cell labels, showing great potential applications in bio-imaging.

• 出版日期2016-9-5
• 单位东华大学