skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Direct Synthesis and Size Selection of Ferromagnetic FePt Nanoparticles

Abstract

A one-step synthesis of L10 FePt nanoparticles ca. 17.0 nm in diameter by reductive decomposition of the single-source precursor, FePt(CO)4dppmBr2, on a water-soluble support (Na2CO3) is demonstrated. Direct conversion of a FePt(CO)4dppmBr2/Na2CO3 composite to a L10 FePt/Na2CO3 nanocomposite occurs at 600 C under getter gas with metal-ion reduction and minimal nanoparticle coalescence. Triturating the resulting nanocomposite with water simultaneously dissolves the sodium carbonate solid support and precipitates the formed fct FePt nanoparticles. As-prepared FePt nanoparticles are ferromagnetic and exhibit coercivities of 14.5 kOe at 300 K and 21.8 kOe at 5 K. When capped by functionalized methoxypoly(ethylene glycol) surfactant molecules, as-prepared, polydisperse ferromagnetic FePt nanoparticles can be dispersed and size-selected by fractional precipitation.

Authors:
 [1];  [1];  [2];  [2];  [2];  [1];  [1]
  1. Vanderbilt University
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shared Research Equipment Collaborative Research Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931894
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemistry of Materials; Journal Volume: 19; Journal Issue: 10
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; IRON ALLOYS; PLATINUM ALLOYS; FERROMAGNETIC MATERIALS; PARTICLE SIZE; SYNTHESIS; NANOSTRUCTURES; PRECURSOR; COERCIVE FORCE; FePt; ferromagnetism; L10 ordering; TEM; nanoparticles; synthesis; size selection

Citation Formats

Wellons, M.S., MorrisIII, William H, Gai, Zheng, Shen, Jian, Bentley, James, Wittig, J. E., and Lukehart, C.M. Direct Synthesis and Size Selection of Ferromagnetic FePt Nanoparticles. United States: N. p., 2007. Web. doi:10.1021/cm062455e.
Wellons, M.S., MorrisIII, William H, Gai, Zheng, Shen, Jian, Bentley, James, Wittig, J. E., & Lukehart, C.M. Direct Synthesis and Size Selection of Ferromagnetic FePt Nanoparticles. United States. doi:10.1021/cm062455e.
Wellons, M.S., MorrisIII, William H, Gai, Zheng, Shen, Jian, Bentley, James, Wittig, J. E., and Lukehart, C.M. Mon . "Direct Synthesis and Size Selection of Ferromagnetic FePt Nanoparticles". United States. doi:10.1021/cm062455e.
@article{osti_931894,
title = {Direct Synthesis and Size Selection of Ferromagnetic FePt Nanoparticles},
author = {Wellons, M.S. and MorrisIII, William H and Gai, Zheng and Shen, Jian and Bentley, James and Wittig, J. E. and Lukehart, C.M.},
abstractNote = {A one-step synthesis of L10 FePt nanoparticles ca. 17.0 nm in diameter by reductive decomposition of the single-source precursor, FePt(CO)4dppmBr2, on a water-soluble support (Na2CO3) is demonstrated. Direct conversion of a FePt(CO)4dppmBr2/Na2CO3 composite to a L10 FePt/Na2CO3 nanocomposite occurs at 600 C under getter gas with metal-ion reduction and minimal nanoparticle coalescence. Triturating the resulting nanocomposite with water simultaneously dissolves the sodium carbonate solid support and precipitates the formed fct FePt nanoparticles. As-prepared FePt nanoparticles are ferromagnetic and exhibit coercivities of 14.5 kOe at 300 K and 21.8 kOe at 5 K. When capped by functionalized methoxypoly(ethylene glycol) surfactant molecules, as-prepared, polydisperse ferromagnetic FePt nanoparticles can be dispersed and size-selected by fractional precipitation.},
doi = {10.1021/cm062455e},
journal = {Chemistry of Materials},
number = 10,
volume = 19,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}