Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 3, Issue 30, Pages 7946-7953Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc01093d
Keywords
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Funding
- European Union (Advanced ERC Grant SPINMOL)
- Spanish MINECO [MAT2011-22785, MAT2014-56143-R]
- Generalidad Valenciana (PROMETEO Programme)
- Generalidad Valenciana (ISIC-Nano Programme)
- International Research Chair Blaise Pascal award
- MICINN
- EU [H2020-MSCA-IF-EF-658224]
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A systematic study of the key synthetic parameters that control the growth of spin-crossover (SCO) nanoparticles (NPs) using the reverse micelle technique has been undertaken in the system [Fe(Htrz)(2)(trz)](BF4)center dot H2O, (Htrz = 1,2,4-triazole). This has permitted us to modulate the physical properties of the NPs in a controlled and reproducible manner. In particular, a control over the size of the NPs (in the range 4 to 16 nm) has been achieved by varying the water to surfactant molar ratio. The consequences of this size variation on the cooperativity of the spin transition are discussed. Finally, this approach has been extended to the chemical alloy [Fe(Htrz)(2.95)(NH(2)trz)(0.05)](ClO4)(2) in order to prepare NPs exhibiting a cooperative and hysteretic spin transition centred closer to room temperature.
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