| AVS 59th Annual International Symposium and Exhibition | |
| Biomaterial Interfaces | Tuesday Sessions |
| Session BI-TuP |
| Session: | Biomaterial Interfaces Poster Session |
| Presenter: | S. Das, University of Central Florida |
| Authors: | S. Das, University of Central Florida C. Neal, University of Central Florida A. Kumar, University of Central Florida A.S. Karakoti, Pacific Northwest National Laboratory S.S. Seal, University of Central Florida |
| Correspondent: | Click to Email |
The objective of this study is to ascertain the role of different molecular weights polyethylene glycol (PEG) solvents on the redox property of cerium nanoparticles. PEG with molecular weight of 300, 600, 1500, 3400 and 6000 were selected in this study for preparing 5mM cerium oxide nanoparticles (CNPs) in 20% PEG medium. The size and morphology of the particles were analyzed using TEM. Interestingly, the size and shapes of the nanoparticles were observed different in different chain length of the PEG nanoparticles from round to star shaped. The red-ox state of the samples was accessed at regular intervals, until stability was observed, using UV-Vis spectroscopy. Absorbance of each sample was recorded in the range of 250nm to 600nm. All the PEG-CNPs sample revealed stable peak at 298nm (characterstic of Ce3+) with additional minor peak observed at 380nm for 1500, 3400 and 6000 PEG-CNPs sample. The biological activity measured by superoxide dismutase mimetic assay was found to be similar for all the PEG-CNPs. The current research suggests that by changing the chain length of the PEG it is possible to synthesize different size and shape of the PEG-CNPs with similar redox activity for specific applications.