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Millifluidic synthesis of cadmium sulfide nanoparticles and their application in bioimaging

swin0826 添加于 2017/8/22 23:10:49  329次阅读 | 0次推荐 | 0个评论

In this paper, a miniature fluidic synthesis platform utilizing millimeter dimension channels for the synthesis of cadmium sulfide (CdS) quantum dots and nanocrystals is demonstrated. Traditional nanoparticle synthesis techniques involve macroscopic flasks where reaction conditions may vary at different positions inside the vessel. Therefore challenges in terms of batch reproducibility for large scale production are of great concern. Here, we show that it is possible to replicate reaction conditions so as to produce nanoparticles with similar optical characteristics across different batches using the same reaction parameters. Particle size control was established by varying the flow rate of the precursors, yielding gradually increasing nanocrystal sizes from 2.4 nm to 3.7 nm with increasing residence time. The as-synthesized CdS nanoparticles exhibited tunable photoluminescence by adjusting the molar ratio of the cadmium and sulfur precursors, giving rise to greenish-blue and orange-red emissions under ultraviolet light illumination. The particles were then studied and characterized using transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) absorbance, photoluminescence, X-ray diffraction (XRD) and selected area electron diffraction (SAED) techniques. Lastly, bioimaging of RAW264.7 mice macrophage cells using ligand exchanged CdS nanoparticles is presented.

作 者:Liying Hong, Tai-Lok Cheung, Nanxi Rao, Qingling Ouyang, Yue Wang, Shuwen Zeng, Chengbin Yang, Dang Cuong, Peter Han Joo Chong, Liwei Liu, Wing-Cheung Law, Ken-Tye Yong
期刊名称: RSC Advances
期卷页: 2017/7 第7卷 第期 36819-36832页
学科领域:化学科学 » 无机化学 » 无机纳米化学
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原文链接:http://pubs.rsc.org/en/content/articlelanding/ra/2017/c7ra05401g#!divAbstract
DOI: 10.1039/C7RA05401G
ISBN: 2046-2069
关键词: microfluidics, CdS, synthesis, bioimaging, fluidic synthesis, miniaturization system
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