Surface Patterns of Tetragonal Phase FePt Thin Films from Pt{at}Fe2O3 Core-Shell Nanoparticles Using Combined Langmuir-Blodgett and Soft Lithographic Techniques

Conference · Tue Sep 30 04:00:00 EDT 2003

OSTI ID:816679

Guo, Q ^[1]; Teng, X; Yang, H

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1. Laboratory for Laser Energetics, University of Rochester, Rochester, NY

OAK B204 We present the fabrication of micron-sized patterns of FePt thin films from Pt{at}Fe2O3 core-shell 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 (u-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.

• Research Organization: Laboratory for Laser Energetics (US)
• Sponsoring Organization: (US)
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 816679
• Report Number(s): DOE/SF-19460-504; 1407; 2003-59
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
ALLOYS
ATOMIC FORCE MICROSCOPY
FABRICATION
HYDROGEN
MAGNETOMETERS
SCANNING ELECTRON MICROSCOPY
SILICON
SQUID DEVICES
THIN FILMS
WATER
X-RAY DIFFRACTION