Issue 1, 2013
From the journal:

Nanoscale

Templated assembly of Co–Pt nanoparticlesvia thermal and laser-induced dewetting of bilayer metal films†

Yong-Jun Oh,*a   Jung-Hwan Kim,a   Carl V. Thompsonb  and  Caroline A. Ross*b  

* Corresponding authors

a Department of Advanced Materials Science and Engineering, Hanbat National University, 125, Dongseo-daero, Yuseong-gu, Daejeon 305-719, Korea
E-mail: yjoh@hanbat.ac.kr

b Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
E-mail: caross@mit.edu

Abstract

Templated dewetting of a Co/Pt metal bilayer film on a topographic substrate was used to assemble arrays of Co–Pt alloy nanoparticles, with highly uniform particle size, shape and notably composition compared to nanoparticles formed on an untemplated substrate. Solid-state and liquid-state dewetting processes, using furnace annealing and laser irradiation respectively, were compared. Liquid state dewetting produced more uniform, conformal nanoparticles but they had a polycrystalline disordered fcc structure and relatively low magnetic coercivity. In contrast, solid state dewetting enabled formation of magnetically hard, ordered L10 Co–Pt single-crystal particles with coercivity >12 kOe. Furnace annealing converted the nanoparticles formed by liquid state dewetting into the L10 phase.

Graphical abstract: Templated assembly of Co–Pt nanoparticles via thermal and laser-induced dewetting of bilayer metal films

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C2NR32932H
Article type
Paper
Submitted
26 Sep 2012
Accepted
06 Nov 2012
First published
23 Nov 2012

Nanoscale, 2013,5, 401-407

Permissions

Request permissions

Templated assembly of Co–Pt nanoparticles via thermal and laser-induced dewetting of bilayer metal films

Y. Oh, J. Kim, C. V. Thompson and C. A. Ross, Nanoscale, 2013, 5, 401 DOI: 10.1039/C2NR32932H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements