Fabrication of CoPt nanoparticles with high coercivity on a polymer film
- Authors
- Kim, Jung Hoon; Kim, Jeon; Baek, Kwang H.; Im, Dong Hyun; Kim, Chang Kyung; Yoon, Chong Seung
- Issue Date
- Jul-2007
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- CoPt; magnetic nanoparticle; monolayer; polyimide
- Citation
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.301, no.1-3, pp.419 - 424
- Indexed
- SCIE
SCOPUS
- Journal Title
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Volume
- 301
- Number
- 1-3
- Start Page
- 419
- End Page
- 424
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/179900
- DOI
- 10.1016/j.colsurfa.2007.01.005
- ISSN
- 0927-7757
- Abstract
- L1(0) structured CoPt nanoparticles were fabricated on a polyimide film by depositing a 1.7-nm-thick Co-Pt alloy film, followed by annealing at 650-800 degrees C during which the Co-Pt alloy film was converted into a monolayer of 4 nm sized L1(0) phase CoPt particles. In order to produce well-separated larger particles, multiple depositions of 1.7-nm-thick Co-Pt alloy film were carried out. Heterogeneous nucleation on the pre-existing CoPt nanoparticles allowed the film deposition and annealing to be repeated up to four times to increase the average particle size from 4 nm to 7 nm as needed. The monolayer of 7-nm-szied CoPt nanoparticles exhibited a high coercivity of 9.8 kOe with a remanence ratio of 0.72. The method can be easily extended to a large area as well as other material systems to create a monolayer of metal nanoisland structures on a polymer film.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 신소재공학부 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.