Synthesis of blue photoluminescent WS2 quantum dots via ultrasonic cavitation

被引：60
作者：
Bayat, A. [1 ]
Saievar-Iranizad, E. [1 ]
机构：
[1] Tarbiat Modares Univ, Fac Basic Sci, Dept Phys, Tehran, Iran
来源：
JOURNAL OF LUMINESCENCE | 2017年 / 185卷
关键词：
WS2 quantum dot; Probe sonication; Luminescence; Eco-friendly solvent; TUNGSTEN DISULFIDE; LIQUID-EXFOLIATION; OPTICAL-PROPERTIES; BAND-STRUCTURES; MONOLAYER MOS2; NANOSHEETS; NANOPARTICLES; NANOCRYSTALS; FABRICATION;
D O I：
10.1016/j.jlumin.2017.01.024
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Blue photoluminescent WS2 quantum dots (QDs) were synthesized using a simple top-down method from natural raw mineral tungsten disulfide via tip ultrasonication followed by centrifugation in a water ethanol (0.7/03 ratio) as eco-friendly solvent. Cavitation process at a high power (300 W) led to the breaking of bulk WS2 flakes to its quantum dots. The as synthesized WS2 QDs showed blue photoluminescence upon UV excitation. The synthesized WS2 QDs were analysed by UV-vis and photoluminescence spectrophotometry, transmission electron microscopy, atomic force microscopy and X-ray diffraction. According to the transmission electron microscopy images, the size of WS2 QDs was obtained as 5 nm in average. (C) 2017 Published by Elsevier B.V.
引用
收藏
页码：236 / 240
页数：5
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