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Facile synthesis of hollow nano-spheres and hemispheres of cobalt by polyol reduction.

Authors :
Haitao Yang
Chengmin Shen
Ningning Song
Yumei Wang
Tianzhong Yang
Hongjun Gao
Zhaohua Cheng
Source :
Nanotechnology; Sep2010, Vol. 21 Issue 37, p375602-375602, 1p
Publication Year :
2010

Abstract

The hydrophilic hollow nano-spheres and hemispheres of Co are synthesized via ethylene glycol reduction of cobalt acetate in the presence of PVP and Pd nano-particle seeds. The dimensions of the hollow core can be tuned from 100 to 300 nm by controlling the amount of Pd nano-particle seeds. The morphology of the hollow materials strongly depends on the molar ratio of the amide unit in PVP over Co and the Mw of PVP. The hollow structure is formed when the ratio falls in the range 1-1.5 and the Mw is over 40 000. Based on the experimental data, a possible formation mechanism of Co hollow spheres is proposed. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09574484
Volume :
21
Issue :
37
Database :
Complementary Index
Journal :
Nanotechnology
Publication Type :
Academic Journal
Accession number :
53378587
Full Text :
https://doi.org/10.1088/0957-4484/21/37/375602