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Surface patterns of tetragonal phase FePt thin films from Pt@Fe2O3 core-shell nanoparticles using combined Langmuir-Blodgett and soft lithographic techniques

Published online by Cambridge University Press:  15 February 2011

Qijie Guo ,
Xiaowei Teng  and
Hong Yang
Qijie Guo
Affiliation:
Department of Chemical Engineering, Laboratory for Laser Energetics (LLE), 206 Gavett , University of Rochester, Rochester, New York 14627-0166, U.S.A.
Xiaowei Teng
Affiliation:
Department of Chemical Engineering, Laboratory for Laser Energetics (LLE), 206 Gavett , University of Rochester, Rochester, New York 14627-0166, U.S.A.
Hong Yang
Affiliation:
Department of Chemical Engineering, Laboratory for Laser Energetics (LLE), 206 Gavett , University of Rochester, Rochester, New York 14627-0166, U.S.A.
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Abstract

We present the fabrication of micron-sized patterns of FePt thin films from Pt@Fe2O3 coreshell nanoparticles. In a typical procedure, Pt@Fe2O3 core-shell nanoparticles were spread and formed a Langmuir film using water as the subphase. This film was lifted onto polydimethylsiloxane (PDMS) stamps with micron-sized patterns of lines, dots and wells, and transferred onto silicon wafers using microcontact printing (ν-CP). The patterns of Pt@Fe2O3 core-shell nanoparticles were converted into face-centered tetragonal phase FePt alloy at enhanced temperatures in the presence of 5% hydrogen. Scanning electron microscopy (SEM), atomic force microscopy (AFM), powder X-ray diffraction (PXRD) and superconducting quantum interference device (SQUID) magnetometer were used to characterize the patterns and the properties of the final FePt alloy films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 776: Symposium Q – Unconventional Approaches to Nanostructures with Applications in Electronics, Photonics, Information Storage and Sensing , 2003 , Q10.7
Copyright
Copyright © Materials Research Society 2003

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