Synthesis and characterization of surface-modified FePt nanocrystals by supercritical hydrothermal method

Toshihiko Arita; Hidetsugu Hitaka; Kimitaka Minami; Takashi Naka; Tadafumi Adschiri

doi:10.1246/cl.2011.588

Synthesis and characterization of surface-modified FePt nanocrystals by supercritical hydrothermal method

Toshihiko Arita, Hidetsugu Hitaka, Kimitaka Minami, Takashi Naka, Tadafumi Adschiri

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Abstract

We have synthesized single nanosized FePt nanocrystals (NCs) by supercritical (sc-) hydrothermal synthesis. The synthesized FePt NCs were characterized by X-ray diffraction (XRD), transmission electron micrography (TEM), electron diffraction (ED), superconducting quantum interference device magnetometry (SQUID), and Fourier transform infrared spectroscopy (FTIR). Surface modification with oleic acid was also successful, and it gave spherical FePt NCs that had average particle size (APS) of 5.0 ± 1.5 nm. In addition, the surfacemodified FePt NCs showed good dispersition into organic solvents. A dispersion in tetrahydrofuran (THF) was stable for at least 3 days. The dried surface-modified FePt NCs were easily oxidized in the atmosphere. This high reactivity to oxygen makes the characterization difficult and, at the same time, may indicate that quite a small amount of Fe NC is included in the reaction products.

Original language	English
Pages (from-to)	588-590
Number of pages	3
Journal	Chemistry Letters
Volume	40
Issue number	6
DOIs	https://doi.org/10.1246/cl.2011.588
Publication status	Published - 2011

ASJC Scopus subject areas

Chemistry(all)

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10.1246/cl.2011.588

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title = "Synthesis and characterization of surface-modified FePt nanocrystals by supercritical hydrothermal method",

abstract = "We have synthesized single nanosized FePt nanocrystals (NCs) by supercritical (sc-) hydrothermal synthesis. The synthesized FePt NCs were characterized by X-ray diffraction (XRD), transmission electron micrography (TEM), electron diffraction (ED), superconducting quantum interference device magnetometry (SQUID), and Fourier transform infrared spectroscopy (FTIR). Surface modification with oleic acid was also successful, and it gave spherical FePt NCs that had average particle size (APS) of 5.0 ± 1.5 nm. In addition, the surfacemodified FePt NCs showed good dispersition into organic solvents. A dispersion in tetrahydrofuran (THF) was stable for at least 3 days. The dried surface-modified FePt NCs were easily oxidized in the atmosphere. This high reactivity to oxygen makes the characterization difficult and, at the same time, may indicate that quite a small amount of Fe NC is included in the reaction products.",

author = "Toshihiko Arita and Hidetsugu Hitaka and Kimitaka Minami and Takashi Naka and Tadafumi Adschiri",

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T1 - Synthesis and characterization of surface-modified FePt nanocrystals by supercritical hydrothermal method

AU - Arita, Toshihiko

AU - Hitaka, Hidetsugu

AU - Minami, Kimitaka

AU - Naka, Takashi

AU - Adschiri, Tadafumi

PY - 2011

Y1 - 2011

N2 - We have synthesized single nanosized FePt nanocrystals (NCs) by supercritical (sc-) hydrothermal synthesis. The synthesized FePt NCs were characterized by X-ray diffraction (XRD), transmission electron micrography (TEM), electron diffraction (ED), superconducting quantum interference device magnetometry (SQUID), and Fourier transform infrared spectroscopy (FTIR). Surface modification with oleic acid was also successful, and it gave spherical FePt NCs that had average particle size (APS) of 5.0 ± 1.5 nm. In addition, the surfacemodified FePt NCs showed good dispersition into organic solvents. A dispersion in tetrahydrofuran (THF) was stable for at least 3 days. The dried surface-modified FePt NCs were easily oxidized in the atmosphere. This high reactivity to oxygen makes the characterization difficult and, at the same time, may indicate that quite a small amount of Fe NC is included in the reaction products.

AB - We have synthesized single nanosized FePt nanocrystals (NCs) by supercritical (sc-) hydrothermal synthesis. The synthesized FePt NCs were characterized by X-ray diffraction (XRD), transmission electron micrography (TEM), electron diffraction (ED), superconducting quantum interference device magnetometry (SQUID), and Fourier transform infrared spectroscopy (FTIR). Surface modification with oleic acid was also successful, and it gave spherical FePt NCs that had average particle size (APS) of 5.0 ± 1.5 nm. In addition, the surfacemodified FePt NCs showed good dispersition into organic solvents. A dispersion in tetrahydrofuran (THF) was stable for at least 3 days. The dried surface-modified FePt NCs were easily oxidized in the atmosphere. This high reactivity to oxygen makes the characterization difficult and, at the same time, may indicate that quite a small amount of Fe NC is included in the reaction products.

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Synthesis and characterization of surface-modified FePt nanocrystals by supercritical hydrothermal method

Abstract

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