Abstract
In this article, we will discuss our efforts towards investigating controlled efforts of ligand exchange in CdSe nanocrystals. Most notably, we focus on the trioctylphosphine oxide coated CdSe system examining the effects of multiple washing of the nanocrystals during the cleaning process. The materials still possess quantum confinement like features, yet are not dispersible in typical organic solvents. Using a host of analytical techniques, including nuclear magnetic resonance, infrared spectroscopy, and thermogravimetric analysis, we probe the how surface coverage is affected during the cleaning process of the nanocrystals. Intriguingly, thin films made from these “excessively cleaned” nanocrystal solutions leads to preferential orientation of particle as observed from powder x-ray diffraction. Lastly, we discuss the impact these surface chemistry treatments have on the photoluminescence of these materials.
Published Version
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