Controlling light emission of CDSE nanoplatelets with metal nanoparticles

• Main Author: Sermsrisuwan, Tony
• Other Authors: Dang Cuong H.
• Format: Theses and Dissertations
• Language: English
• Published: 2019
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: http://hdl.handle.net/10356/77926
• Institution: Nanyang Technological University

With the advancements in photoluminescent NPLs, it is of great interest that they can be manipulated and controlled to achieve the best performance. Fluorescence quenching, as a way to lower the emission intensity and control its output wavelength and lifetime, is receiving a great amount of interest in the recent years. Although many researches have been done of such systems in solid substrates, few have analyzed the interactions between the a fluorescent NPLs and colloidal metal nanoparticles, and none, as far as it is concerned, between CdSe NPLs and gold or silver nanoparticles. CdSe NPLs were used for this purpose because they have recently emerged as a great fluorophore due to their controllability and high emission without significant quenching in the aqueous substrate. In this research, the gold and silver monometallic nanoparticles were synthesized using the existing protocols, before they were simply mixed with CdSe NPLs in aqueous solution to determine their quenching characteristics. It is observed that the emission of the CdSe decreases with the increasing proportion of gold or silver nanoparticles – with silver displaying a more significant effect. Further experiments are required to accurately evaluate the corresponding outcomes and obtain a useful conclusion from the results, which can be potentially useful in future device developments.