A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell

Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly appl...
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Gespeichert in:

Autor*in:	Douvalis, Alexios P. [verfasserIn] Zboril, Radek [verfasserIn] Bourlinos, Athanasios B. [verfasserIn] Tucek, Jiri [verfasserIn] Spyridi, Stavroula [verfasserIn] Bakas, Thomas [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2012

Schlagwörter:	Magnetic nanoparticles Core–shell Borohydride Ferrihydrite Mössbauer spectroscopy Magnetization measurements

Übergeordnetes Werk:	Enthalten in: Journal of nanoparticle research - Dordrecht [u.a.] : Springer Science + Business Media B.V, 1999, 14(2012), 9 vom: 31. Aug.
Übergeordnetes Werk:	volume:14 ; year:2012 ; number:9 ; day:31 ; month:08

Links:	Volltext

DOI / URN:	10.1007/s11051-012-1130-z

Katalog-ID:	SPR016070224

Internformat


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520			\|a Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine.
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650		4	\|a Ferrihydrite \|7 (dpeaa)DE-He213
650		4	\|a Mössbauer spectroscopy \|7 (dpeaa)DE-He213
650		4	\|a Magnetization measurements \|7 (dpeaa)DE-He213
700	1		\|a Zboril, Radek \|e verfasserin \|4 aut
700	1		\|a Bourlinos, Athanasios B. \|e verfasserin \|4 aut
700	1		\|a Tucek, Jiri \|e verfasserin \|4 aut
700	1		\|a Spyridi, Stavroula \|e verfasserin \|4 aut
700	1		\|a Bakas, Thomas \|e verfasserin \|4 aut
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912			\|a GBV_ILN_151
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912			\|a GBV_ILN_187
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912			\|a GBV_ILN_213
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912			\|a GBV_ILN_230
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912			\|a GBV_ILN_702
912			\|a GBV_ILN_2001
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912			\|a GBV_ILN_2005
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912			\|a GBV_ILN_2010
912			\|a GBV_ILN_2011
912			\|a GBV_ILN_2014
912			\|a GBV_ILN_2015
912			\|a GBV_ILN_2020
912			\|a GBV_ILN_2021
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912			\|a GBV_ILN_2026
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912			\|a GBV_ILN_2031
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912			\|a GBV_ILN_2048
912			\|a GBV_ILN_2049
912			\|a GBV_ILN_2050
912			\|a GBV_ILN_2055
912			\|a GBV_ILN_2057
912			\|a GBV_ILN_2059
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936	b	k	\|a 51.45 \|q ASE
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952			\|d 14 \|j 2012 \|e 9 \|b 31 \|c 08

Indexfelder

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matchkey_str	article:1572896X:2012----::fclsnhtcottwrartbeantcaolosihei
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publishDate	2012
allfields	10.1007/s11051-012-1130-z doi (DE-627)SPR016070224 (SPR)s11051-012-1130-z-e DE-627 ger DE-627 rakwb eng 570 ASE 51.45 bkl Douvalis, Alexios P. verfasserin aut A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine. Magnetic nanoparticles (dpeaa)DE-He213 Core–shell (dpeaa)DE-He213 Borohydride (dpeaa)DE-He213 Ferrihydrite (dpeaa)DE-He213 Mössbauer spectroscopy (dpeaa)DE-He213 Magnetization measurements (dpeaa)DE-He213 Zboril, Radek verfasserin aut Bourlinos, Athanasios B. verfasserin aut Tucek, Jiri verfasserin aut Spyridi, Stavroula verfasserin aut Bakas, Thomas verfasserin aut Enthalten in Journal of nanoparticle research Dordrecht [u.a.] : Springer Science + Business Media B.V, 1999 14(2012), 9 vom: 31. Aug. (DE-627)320575667 (DE-600)2017013-0 1572-896X nnns volume:14 year:2012 number:9 day:31 month:08 https://dx.doi.org/10.1007/s11051-012-1130-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 51.45 ASE AR 14 2012 9 31 08
spelling	10.1007/s11051-012-1130-z doi (DE-627)SPR016070224 (SPR)s11051-012-1130-z-e DE-627 ger DE-627 rakwb eng 570 ASE 51.45 bkl Douvalis, Alexios P. verfasserin aut A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine. Magnetic nanoparticles (dpeaa)DE-He213 Core–shell (dpeaa)DE-He213 Borohydride (dpeaa)DE-He213 Ferrihydrite (dpeaa)DE-He213 Mössbauer spectroscopy (dpeaa)DE-He213 Magnetization measurements (dpeaa)DE-He213 Zboril, Radek verfasserin aut Bourlinos, Athanasios B. verfasserin aut Tucek, Jiri verfasserin aut Spyridi, Stavroula verfasserin aut Bakas, Thomas verfasserin aut Enthalten in Journal of nanoparticle research Dordrecht [u.a.] : Springer Science + Business Media B.V, 1999 14(2012), 9 vom: 31. Aug. (DE-627)320575667 (DE-600)2017013-0 1572-896X nnns volume:14 year:2012 number:9 day:31 month:08 https://dx.doi.org/10.1007/s11051-012-1130-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 51.45 ASE AR 14 2012 9 31 08
allfields_unstemmed	10.1007/s11051-012-1130-z doi (DE-627)SPR016070224 (SPR)s11051-012-1130-z-e DE-627 ger DE-627 rakwb eng 570 ASE 51.45 bkl Douvalis, Alexios P. verfasserin aut A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine. Magnetic nanoparticles (dpeaa)DE-He213 Core–shell (dpeaa)DE-He213 Borohydride (dpeaa)DE-He213 Ferrihydrite (dpeaa)DE-He213 Mössbauer spectroscopy (dpeaa)DE-He213 Magnetization measurements (dpeaa)DE-He213 Zboril, Radek verfasserin aut Bourlinos, Athanasios B. verfasserin aut Tucek, Jiri verfasserin aut Spyridi, Stavroula verfasserin aut Bakas, Thomas verfasserin aut Enthalten in Journal of nanoparticle research Dordrecht [u.a.] : Springer Science + Business Media B.V, 1999 14(2012), 9 vom: 31. Aug. (DE-627)320575667 (DE-600)2017013-0 1572-896X nnns volume:14 year:2012 number:9 day:31 month:08 https://dx.doi.org/10.1007/s11051-012-1130-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 51.45 ASE AR 14 2012 9 31 08
allfieldsGer	10.1007/s11051-012-1130-z doi (DE-627)SPR016070224 (SPR)s11051-012-1130-z-e DE-627 ger DE-627 rakwb eng 570 ASE 51.45 bkl Douvalis, Alexios P. verfasserin aut A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine. Magnetic nanoparticles (dpeaa)DE-He213 Core–shell (dpeaa)DE-He213 Borohydride (dpeaa)DE-He213 Ferrihydrite (dpeaa)DE-He213 Mössbauer spectroscopy (dpeaa)DE-He213 Magnetization measurements (dpeaa)DE-He213 Zboril, Radek verfasserin aut Bourlinos, Athanasios B. verfasserin aut Tucek, Jiri verfasserin aut Spyridi, Stavroula verfasserin aut Bakas, Thomas verfasserin aut Enthalten in Journal of nanoparticle research Dordrecht [u.a.] : Springer Science + Business Media B.V, 1999 14(2012), 9 vom: 31. Aug. (DE-627)320575667 (DE-600)2017013-0 1572-896X nnns volume:14 year:2012 number:9 day:31 month:08 https://dx.doi.org/10.1007/s11051-012-1130-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 51.45 ASE AR 14 2012 9 31 08
allfieldsSound	10.1007/s11051-012-1130-z doi (DE-627)SPR016070224 (SPR)s11051-012-1130-z-e DE-627 ger DE-627 rakwb eng 570 ASE 51.45 bkl Douvalis, Alexios P. verfasserin aut A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine. Magnetic nanoparticles (dpeaa)DE-He213 Core–shell (dpeaa)DE-He213 Borohydride (dpeaa)DE-He213 Ferrihydrite (dpeaa)DE-He213 Mössbauer spectroscopy (dpeaa)DE-He213 Magnetization measurements (dpeaa)DE-He213 Zboril, Radek verfasserin aut Bourlinos, Athanasios B. verfasserin aut Tucek, Jiri verfasserin aut Spyridi, Stavroula verfasserin aut Bakas, Thomas verfasserin aut Enthalten in Journal of nanoparticle research Dordrecht [u.a.] : Springer Science + Business Media B.V, 1999 14(2012), 9 vom: 31. Aug. (DE-627)320575667 (DE-600)2017013-0 1572-896X nnns volume:14 year:2012 number:9 day:31 month:08 https://dx.doi.org/10.1007/s11051-012-1130-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 51.45 ASE AR 14 2012 9 31 08
language	English
source	Enthalten in Journal of nanoparticle research 14(2012), 9 vom: 31. Aug. volume:14 year:2012 number:9 day:31 month:08
sourceStr	Enthalten in Journal of nanoparticle research 14(2012), 9 vom: 31. Aug. volume:14 year:2012 number:9 day:31 month:08
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Magnetic nanoparticles Core–shell Borohydride Ferrihydrite Mössbauer spectroscopy Magnetization measurements
dewey-raw	570
isfreeaccess_bool	false
container_title	Journal of nanoparticle research
authorswithroles_txt_mv	Douvalis, Alexios P. @@aut@@ Zboril, Radek @@aut@@ Bourlinos, Athanasios B. @@aut@@ Tucek, Jiri @@aut@@ Spyridi, Stavroula @@aut@@ Bakas, Thomas @@aut@@
publishDateDaySort_date	2012-08-31T00:00:00Z
hierarchy_top_id	320575667
dewey-sort	3570
id	SPR016070224
language_de	englisch
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author	Douvalis, Alexios P.
spellingShingle	Douvalis, Alexios P. ddc 570 bkl 51.45 misc Magnetic nanoparticles misc Core–shell misc Borohydride misc Ferrihydrite misc Mössbauer spectroscopy misc Magnetization measurements A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell
authorStr	Douvalis, Alexios P.
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topic_title	570 ASE 51.45 bkl A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell Magnetic nanoparticles (dpeaa)DE-He213 Core–shell (dpeaa)DE-He213 Borohydride (dpeaa)DE-He213 Ferrihydrite (dpeaa)DE-He213 Mössbauer spectroscopy (dpeaa)DE-He213 Magnetization measurements (dpeaa)DE-He213
topic	ddc 570 bkl 51.45 misc Magnetic nanoparticles misc Core–shell misc Borohydride misc Ferrihydrite misc Mössbauer spectroscopy misc Magnetization measurements
topic_unstemmed	ddc 570 bkl 51.45 misc Magnetic nanoparticles misc Core–shell misc Borohydride misc Ferrihydrite misc Mössbauer spectroscopy misc Magnetization measurements
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title	A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell
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title_full	A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell
author_sort	Douvalis, Alexios P.
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author_browse	Douvalis, Alexios P. Zboril, Radek Bourlinos, Athanasios B. Tucek, Jiri Spyridi, Stavroula Bakas, Thomas
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author-letter	Douvalis, Alexios P.
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title_sort	facile synthetic route toward air-stable magnetic nanoalloys with fe–ni/fe–co core and iron oxide shell
title_auth	A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell
abstract	Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine.
abstractGer	Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine.
abstract_unstemmed	Abstract Air-stable bimetallic spherically shaped Fe–Ni and Fe–Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core–shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe–Ni and Fe–Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and Mössbauer data demonstrate a core–shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below ~25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine.
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container_issue	9
title_short	A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell
url	https://dx.doi.org/10.1007/s11051-012-1130-z
remote_bool	true
author2	Zboril, Radek Bourlinos, Athanasios B. Tucek, Jiri Spyridi, Stavroula Bakas, Thomas
author2Str	Zboril, Radek Bourlinos, Athanasios B. Tucek, Jiri Spyridi, Stavroula Bakas, Thomas
ppnlink	320575667
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isOA_txt	false
hochschulschrift_bool	false
doi_str	10.1007/s11051-012-1130-z
up_date	2024-07-03T20:33:45.263Z
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A facile synthetic route toward air-stable magnetic nanoalloys with Fe–Ni/Fe–Co core and iron oxide shell

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