Abstract
In this article, we report the synthesis of "solid solution" and "core-shell" types of well-defined Co-Pt nanoalloys smaller than 10 nm. The formation of these alloys is driven by redox transmetalation reactions between the reagents without the need for any additional reductants. Also the reaction proceeds selectively as long as the redox potential between the two metals is favorable. The reaction between Co2(CO)8 and Pt(hfac)2 (hfac = hexafluoroacetylacetonate) results in the formation of "solid solution" type alloys such as CocorePt3 nanoparticles. On the other hand, the reaction of Co nanoparticles with Pt(hfac)2 in solution results in "Cocore-Ptshell" type nanoalloys. Nanoparticles synthesized by both reactions are moderately monodispersed (σ < 10%) without any further size selection processes. The composition of the alloys can also be tuned by adjusting the ratio of reactants. The magnetic and structural properties of the obtained nanoparticles and reaction byproducts are characterized by TEM, SQUID, UV/vis, IR, EDAX, and XRD.
| Original language | English |
|---|---|
| Pages (from-to) | 5743-5746 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 123 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2001 Oct 9 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry
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Synthesis of "solid solution" and "core-shell" type cobalt-platinum magnetic nanoparticles via transmetalation reactions. / Park, J. I.; Cheon, J.
In: Journal of the American Chemical Society, Vol. 123, No. 24, 09.10.2001, p. 5743-5746.Research output: Contribution to journal › Article
TY - JOUR
T1 - Synthesis of "solid solution" and "core-shell" type cobalt-platinum magnetic nanoparticles via transmetalation reactions
AU - Park, J. I.
AU - Cheon, J.
PY - 2001/10/9
Y1 - 2001/10/9
N2 - In this article, we report the synthesis of "solid solution" and "core-shell" types of well-defined Co-Pt nanoalloys smaller than 10 nm. The formation of these alloys is driven by redox transmetalation reactions between the reagents without the need for any additional reductants. Also the reaction proceeds selectively as long as the redox potential between the two metals is favorable. The reaction between Co2(CO)8 and Pt(hfac)2 (hfac = hexafluoroacetylacetonate) results in the formation of "solid solution" type alloys such as CocorePt3 nanoparticles. On the other hand, the reaction of Co nanoparticles with Pt(hfac)2 in solution results in "Cocore-Ptshell" type nanoalloys. Nanoparticles synthesized by both reactions are moderately monodispersed (σ < 10%) without any further size selection processes. The composition of the alloys can also be tuned by adjusting the ratio of reactants. The magnetic and structural properties of the obtained nanoparticles and reaction byproducts are characterized by TEM, SQUID, UV/vis, IR, EDAX, and XRD.
AB - In this article, we report the synthesis of "solid solution" and "core-shell" types of well-defined Co-Pt nanoalloys smaller than 10 nm. The formation of these alloys is driven by redox transmetalation reactions between the reagents without the need for any additional reductants. Also the reaction proceeds selectively as long as the redox potential between the two metals is favorable. The reaction between Co2(CO)8 and Pt(hfac)2 (hfac = hexafluoroacetylacetonate) results in the formation of "solid solution" type alloys such as CocorePt3 nanoparticles. On the other hand, the reaction of Co nanoparticles with Pt(hfac)2 in solution results in "Cocore-Ptshell" type nanoalloys. Nanoparticles synthesized by both reactions are moderately monodispersed (σ < 10%) without any further size selection processes. The composition of the alloys can also be tuned by adjusting the ratio of reactants. The magnetic and structural properties of the obtained nanoparticles and reaction byproducts are characterized by TEM, SQUID, UV/vis, IR, EDAX, and XRD.
UR - http://www.scopus.com/inward/record.url?scp=0034812336&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034812336&partnerID=8YFLogxK
U2 - 10.1021/ja0156340
DO - 10.1021/ja0156340
M3 - Article
C2 - 11403607
AN - SCOPUS:0034812336
VL - 123
SP - 5743
EP - 5746
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 24
ER -