Work

Water-soluble, high-quality ZnSe@ZnS core/shell structure nanocrystals

Year: 2013

Type: article

Abstract: Water-soluble and high photoluminescence (PL) efficiency ZnSe@ZnS core/shell quantum dots were synthesized by a facile aqueous phase route in the presence of additional glutathione ligand as a stabilizer and thiourea as a sulfur source. The structure and optical properties of the obtained ZnSe@ZnS nanocrystals were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy, ultraviolet–visible spectroscopy, PL spectroscopy, and Fourier transform infrared spectrometer. The ZnSe@ZnS shows a cubic zinc-blende crystal phase and has a narrow size distribution. Experimental results indicate that the ZnS shell plays a pivotal role in determining optical features. With the reaction time from 0 to 3 h, the fluorescence emissions of ZnSe@ZnS nanocrystals are tunable between 372 and 380 nm. The high quantum yields are calculated to be in the range of 23%–62.8%. The mechanism for the resulting high-quality optical properties is also elucidated.

Source: Journal of the Chinese Advanced Materials Society

DOI: 10.1080/22243682.2013.773649

Authors: Yongling Ding, Huadong Sun, Dong Liu, Futian Liu, Dongzhi Wang, Qinghui Jiang

Institutions: University of Jinan, China University of Petroleum, Beijing, China University of Petroleum, East China

Language: English

Topic: Quantum Dots Synthesis And Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Department of Education of Shandong Province, National Natural Science Foundation of China, Natural Science Foundation of Shandong Province

Award: BiFeO3基多铁性纳米陶瓷的制备及物性研究