Templated synthesis of gold-iron alloy nanoparticles using pulsed laser deposition

Won Suk Chang; Jin Won Park; Vijay Rawat; Timothy Sands; Gil U. Lee

doi:10.1088/0957-4484/17/20/015

Templated synthesis of gold-iron alloy nanoparticles using pulsed laser deposition

Won Suk Chang, Jin Won Park, Vijay Rawat, Timothy Sands, Gil U. Lee

Dept. of Chemical and Biomolecular Engineering

Purdue University

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A means for synthesizing paramagnetic nanoparticles composed of an Au-Fe alloy is described using pulsed laser deposition (PLD) of the alloy into a mesoporous alumina membrane template. Nanoparticles 46 13nm in diameter and composed of a 17%Fe alloy have been created by depositing a 35%Fe alloy into a template with 65nm diameter pores. These paramagnetic nanoparticles had a saturation magnetization of 11.5emug^-1 at 2000G, and their UV-visible extinction spectrum was dominated by strong absorption similar to that of Fe₃O₄ nanoparticles. The surfaces of these nanoparticles were readily functionalized with a dense monolayer of DNA oligonucleotides that had a 5′ thiol group. The Au-Fe nanoparticles appear to be well suited for biotechnological applications and single molecule measurements as they can be synthesized in a specific size range, are strongly paramagnetic, and may be easily functionalized with biological macromolecules.

Original language	English
Article number	015
Pages (from-to)	5131-5135
Number of pages	5
Journal	Nanotechnology
Volume	17
Issue number	20
DOIs	https://doi.org/10.1088/0957-4484/17/20/015
State	Published - 28 Oct 2006

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title = "Templated synthesis of gold-iron alloy nanoparticles using pulsed laser deposition",

abstract = "A means for synthesizing paramagnetic nanoparticles composed of an Au-Fe alloy is described using pulsed laser deposition (PLD) of the alloy into a mesoporous alumina membrane template. Nanoparticles 46 13nm in diameter and composed of a 17\%Fe alloy have been created by depositing a 35\%Fe alloy into a template with 65nm diameter pores. These paramagnetic nanoparticles had a saturation magnetization of 11.5emug-1 at 2000G, and their UV-visible extinction spectrum was dominated by strong absorption similar to that of Fe3O4 nanoparticles. The surfaces of these nanoparticles were readily functionalized with a dense monolayer of DNA oligonucleotides that had a 5′ thiol group. The Au-Fe nanoparticles appear to be well suited for biotechnological applications and single molecule measurements as they can be synthesized in a specific size range, are strongly paramagnetic, and may be easily functionalized with biological macromolecules.",

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AU - Chang, Won Suk

AU - Park, Jin Won

AU - Rawat, Vijay

AU - Sands, Timothy

AU - Lee, Gil U.

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AB - A means for synthesizing paramagnetic nanoparticles composed of an Au-Fe alloy is described using pulsed laser deposition (PLD) of the alloy into a mesoporous alumina membrane template. Nanoparticles 46 13nm in diameter and composed of a 17%Fe alloy have been created by depositing a 35%Fe alloy into a template with 65nm diameter pores. These paramagnetic nanoparticles had a saturation magnetization of 11.5emug-1 at 2000G, and their UV-visible extinction spectrum was dominated by strong absorption similar to that of Fe3O4 nanoparticles. The surfaces of these nanoparticles were readily functionalized with a dense monolayer of DNA oligonucleotides that had a 5′ thiol group. The Au-Fe nanoparticles appear to be well suited for biotechnological applications and single molecule measurements as they can be synthesized in a specific size range, are strongly paramagnetic, and may be easily functionalized with biological macromolecules.

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Templated synthesis of gold-iron alloy nanoparticles using pulsed laser deposition

Abstract

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