Physicochemical properties of surface charge-modified ZnO nanoparticles with different particle sizes
- Authors
- Kim, Kyoung-Min; Choi, Mun-Hyoung; Lee, Jong-Kwon; Jeong, Jayoung; Kim, Yu-Ri; Kim, Meyoung-Kon; Paek, Seung-Min; Oh, Jae-Min
- Issue Date
- 15-12월-2014
- Publisher
- DOVE MEDICAL PRESS LTD
- Keywords
- ZnO nanoparticles; surface coating; surface charge; particle size; physicochemical properties
- Citation
- INTERNATIONAL JOURNAL OF NANOMEDICINE, v.9, pp.41 - 56
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF NANOMEDICINE
- Volume
- 9
- Start Page
- 41
- End Page
- 56
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/96479
- DOI
- 10.2147/IJN.S57923
- ISSN
- 1176-9114
- Abstract
- In this study, four types of standardized ZnO nanoparticles were prepared for assessment of their potential biological risk. Powder-phased ZnO nanoparticles with different particle sizes (20 nm and 100 nm) were coated with citrate or L-serine to induce a negative or positive surface charge, respectively. The four types of coated ZnO nanoparticles were subjected to physicochemical evaluation according to the guidelines published by the Organisation for Economic Cooperation and Development. All four samples had a well crystallized Wurtzite phase, with particle sizes of similar to 30 nm and similar to 70 nm after coating with organic molecules. The coating agents were determined to have attached to the ZnO surfaces through either electrostatic interaction or partial coordination bonding. Electrokinetic measurements showed that the surface charges of the ZnO nanoparticles were successfully modified to be negative (about -40 mV) or positive (about +25 mV). Although all the four types of ZnO nanoparticles showed some agglomeration when suspended in water according to dynamic light scattering analysis, they had clearly distinguishable particle size and surface charge parameters and well defined physicochemical properties.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Department of Biomedical Sciences > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.