One-step synthesis and characterization of ultrastable and amorphous Fe3O4 colloids capped with cysteine molecules

Hua Cohen; Aharon Gedanken; Ziyi Zhong

doi:10.1021/jp805090y

One-step synthesis and characterization of ultrastable and amorphous Fe₃O₄ colloids capped with cysteine molecules

Hua Cohen, Aharon Gedanken^*, Ziyi Zhong

^*Corresponding author for this work

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

71 Scopus citations

Abstract

A one-step sonochemical synthesis of a uniformly dispersed aqueous solution of amorphous Fe₃O₄ nanoparticles capped with DL-cysteine (cys) has been achieved. During the sonication, several processes or chemical reactions occurred: the decomposition of iron pentacarbonyl (Fe(CO)5), the formation of amorphous Fe₃CO₄ nanoparticles, the capping of the Fec with cysteine molecules, the formation of a surface chemical bond of Fe-S between Fe₃O₄ particles and sulfur from cysteine, and the formation of cystine by linking two cysteine molecules. These capping cystine and cysteine molecules acted both as antioxidants and stabilizers, and the capped Fe₃O₄ colloids could be stable as long as 3 months at room temperature. Usually, the size of the amorphous Fe ₃O₄ nanoparticles capped with Cys was found to be 20-30 nm. The products were characterized by a number of analytical techniques, such as XRD, DSC, TGA, XPS, TEM, HRTEM, Raman Spectroscopy, magnetic measurements, and spot tests.

Original language	English
Pages (from-to)	15429-15438
Number of pages	10
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	39
DOIs	https://doi.org/10.1021/jp805090y
State	Published - 2 Oct 2008
Externally published	Yes

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title = "One-step synthesis and characterization of ultrastable and amorphous Fe3O4 colloids capped with cysteine molecules",

abstract = "A one-step sonochemical synthesis of a uniformly dispersed aqueous solution of amorphous Fe3O4 nanoparticles capped with DL-cysteine (cys) has been achieved. During the sonication, several processes or chemical reactions occurred: the decomposition of iron pentacarbonyl (Fe(CO)5), the formation of amorphous Fe3CO4 nanoparticles, the capping of the Fec with cysteine molecules, the formation of a surface chemical bond of Fe-S between Fe3O4 particles and sulfur from cysteine, and the formation of cystine by linking two cysteine molecules. These capping cystine and cysteine molecules acted both as antioxidants and stabilizers, and the capped Fe3O4 colloids could be stable as long as 3 months at room temperature. Usually, the size of the amorphous Fe 3O4 nanoparticles capped with Cys was found to be 20-30 nm. The products were characterized by a number of analytical techniques, such as XRD, DSC, TGA, XPS, TEM, HRTEM, Raman Spectroscopy, magnetic measurements, and spot tests.",

author = "Hua Cohen and Aharon Gedanken and Ziyi Zhong",

year = "2008",

month = oct,

day = "2",

doi = "10.1021/jp805090y",

language = "英语",

volume = "112",

pages = "15429--15438",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

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T1 - One-step synthesis and characterization of ultrastable and amorphous Fe3O4 colloids capped with cysteine molecules

AU - Cohen, Hua

AU - Gedanken, Aharon

AU - Zhong, Ziyi

PY - 2008/10/2

Y1 - 2008/10/2

N2 - A one-step sonochemical synthesis of a uniformly dispersed aqueous solution of amorphous Fe3O4 nanoparticles capped with DL-cysteine (cys) has been achieved. During the sonication, several processes or chemical reactions occurred: the decomposition of iron pentacarbonyl (Fe(CO)5), the formation of amorphous Fe3CO4 nanoparticles, the capping of the Fec with cysteine molecules, the formation of a surface chemical bond of Fe-S between Fe3O4 particles and sulfur from cysteine, and the formation of cystine by linking two cysteine molecules. These capping cystine and cysteine molecules acted both as antioxidants and stabilizers, and the capped Fe3O4 colloids could be stable as long as 3 months at room temperature. Usually, the size of the amorphous Fe 3O4 nanoparticles capped with Cys was found to be 20-30 nm. The products were characterized by a number of analytical techniques, such as XRD, DSC, TGA, XPS, TEM, HRTEM, Raman Spectroscopy, magnetic measurements, and spot tests.

AB - A one-step sonochemical synthesis of a uniformly dispersed aqueous solution of amorphous Fe3O4 nanoparticles capped with DL-cysteine (cys) has been achieved. During the sonication, several processes or chemical reactions occurred: the decomposition of iron pentacarbonyl (Fe(CO)5), the formation of amorphous Fe3CO4 nanoparticles, the capping of the Fec with cysteine molecules, the formation of a surface chemical bond of Fe-S between Fe3O4 particles and sulfur from cysteine, and the formation of cystine by linking two cysteine molecules. These capping cystine and cysteine molecules acted both as antioxidants and stabilizers, and the capped Fe3O4 colloids could be stable as long as 3 months at room temperature. Usually, the size of the amorphous Fe 3O4 nanoparticles capped with Cys was found to be 20-30 nm. The products were characterized by a number of analytical techniques, such as XRD, DSC, TGA, XPS, TEM, HRTEM, Raman Spectroscopy, magnetic measurements, and spot tests.

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U2 - 10.1021/jp805090y

DO - 10.1021/jp805090y

M3 - 文章

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SN - 1932-7447

VL - 112

SP - 15429

EP - 15438

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 39

ER -

One-step synthesis and characterization of ultrastable and amorphous Fe₃O₄ colloids capped with cysteine molecules

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