Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 2, Pages 786-790Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2011.08.096
Keywords
ZnO nanoparticles; Surface-modification; Visible light-emission; Zeta potential; Noncytotoxicity; Azide/alkyne click reaction
Categories
Funding
- Foundation for Priority Research Project (S-Takumi Nanomedicine) of Shimane University
- Grants-in-Aid for Scientific Research [23570138] Funding Source: KAKEN
Ask authors/readers for more resources
Novel surface-modified, visible light-emitting and noncytotoxic ZnO nanoparticles (NPs) (ZPAZ) having aminotriethylene oxide chains linked by 1,4-and/or 1,5-disubstituted 1,2,3-triazole rings were prepared from ZnO NPs (ZPA) with ethynyl groups on the surfaces and an azide derivative of triethylene oxide chain linking terminal amino group (ATA) via 1,3-dipolar azide/alkyne click reaction by heating without Cu(I) catalyst. FTIR spectroscopy, elemental analysis, XRD analysis and TEM observation suggested that the resulting ZPA and ZPAZ NPs have the particle sizes below 10 nm in diameters, triethylene oxide chains linking the terminal amino groups and wurtzite crystal structure. UV-vis absorption spectrum of the ZPAZ NPs in methanol showed maximum absorption band at 346.5 nm, supporting the TEM observation. PL spectra depicted that the ZPA and ZPAZ NPs display broad light green and lightly greenish yellow visible light emitting bands in methanol. Zeta potentials measured in distilled water suggested that the ZPAZ NPs have a low tendency to aggregate and possess better stability than the ZPA NPs. Cytotoxicity assay revealed that the ZPAZ NPs, having water-dispersion properties, are noncytotoxic at low concentrations and almost all RAW264.7 cells are alive after 24 h of treatment. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available