Paper Title:
Polymer-Stabilized Co Nanocrystals
  Abstract

Polymer-coated cobalt nanocrystals were prepared in a polar solvent at high temperature through an organometallic thermal-decomposition route in the presence of poly (N-viny-2- pyrrolidone) as a protective polymer. The as-synthesized PVP-coated cobalt nanocrystals were 20 to 80 nm cubic/hexagonal shapes. HCP was further determined as a main phase in these samples. For comparison purposes, we have also prepared PVP-cobalt nanocrystals using the seed-mediated thermal decomposition method. It revealed that PVP plays a significant role in the synthesis of cubicstructured cobalt nanocrystals. It was also noted that the formation of Co nanocrystals and their magnetic properties were dependent not only on the PVP component but also in the synthetic route. The saturation magnetization (MS) determined from the seed-mediated sample is lower than that of the conventional sample. The coercivity of the former (610 Oe at 5 K), however, is double that of latter (300 Oe at 5 K), indicating that coercivity strongly depends on the crystallinity of the cobalt.

  Info
Periodical
Key Engineering Materials (Volumes 277-279)
Edited by
Kwang Hwa Chung, Yong Hyeon Shin, Sue-Nie Park, Hyun Sook Cho, Soon-Ae Yoo, Byung Joo Min, Hyo-Suk Lim and Kyung Hwa Yoo
Pages
956-960
DOI
10.4028/www.scientific.net/KEM.277-279.956
Citation
E. Y. Shin, J. Fang, C. J. O'Connor, V. Golub, C. Wang, M. J. Jun, "Polymer-Stabilized Co Nanocrystals", Key Engineering Materials, Vols. 277-279, pp. 956-960, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: C. Satienpattanakoon, D. Yiamsawas, Wiyong Kangwansupamonkon, R. Nuisin
Abstract:The nanostructural zinc oxide (ZnO) particles have been synthesized by two techniques, solid-state reaction and solvothermal method. The...
657
Authors: Yu Liang Zhang, Xiao Feng Li
Abstract:The structure and the magnetic properties of 3.0 and 0.3 at.% Mn-containing ZnO-based DMSs, synthesized by a straightforward and...
533
Authors: Bo Yang Liu, De Chang Jia, Li Hua Dong, Yan Sheng Yin
Abstract:Hollow carbon spheres containing Fe3N nanocrystals (Fe3N/HCSs) are synthesized by ferrocene and ammonium chloride in high pressure argon at...
1281
Authors: Zhen Li, Li Wei Peng, Fei Gao, Deng Yu Pan, Ming Hong Wu
Micro/Nano Materials
Abstract:In this paper, a rapid, facile and green strategy — electron beam irradiation has been developed to prepare CdSe nanoparticles. 10 mA GJ-2-II...
697
Authors: Xu Yao Xu, Lin Ma, Xiao Ping Zhou
Chapter 10: Material Preparation, Properties and Failure
Abstract:LaF3 and LaF3: Re (Re= Ce3+, Eu3+ and Tb3+) nanocrystals have been successfully...
1547