ABSTRACT Self-organization of nanoparticles into two- and three-dimensional superlattices on a large scale is required for their implementation into nano- or microelectronic devices1,2. This

is achieved, generally after a size-selection process3,4, through spontaneous self-organization on a surface5,6,7,8,9,10,11, layer-by-layer deposition12 or the three-layer technique of

oversaturation3,14, but these techniques consider superlattices of limited size. An alternative method developed in our group involves the direct formation in solution of crystalline

superlattices, for example of tin nanospheres, iron nanocubes or cobalt nanorods, but these are also of limited size15,16,17. Here, we report the first direct preparation in solution of

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TREATMENTS Article Open access 14 October 2020 REFERENCES * Alivisatos, A. P. Semiconductor clusters, nanocrystals and quantum dots. _Science_ 271, 933–937 (1996). Article  Google Scholar  *

Carter, J. D., Cheng, G. & Guo, T. Growth of self-aligned crystalline cobalt silicide nanostructures from Co nanoparticles. _J. Phys. Chem. B._ 108, 6901–6904 (2004). Article  Google

Scholar  * Wang, Z. L. et al. Superlattices of self-assembled tetrahedral Ag nanocrystals. _Adv. Mater._ 10, 808–812 (1998). Article  Google Scholar  * Park, J. et al. Ultra-large-scale

syntheses of monodisperse nanocrystals. _Nature Mater._ 3, 891–895 (2004). Article  Google Scholar  * Legrand, J., Ngo, A. T., Petit, C. & Pileni, M. P. Domain shapes and superlattices

made of cobalt nanocrystals. _Adv. Mater._ 13, 58–62 (2001). Article  Google Scholar  * Sigman, M. B., Saunders, A. E. & Korgel, B. A. Metal nanocrystal superlattice nucleation and

growth. _Langmuir_ 20, 978–983 (2004). Article  Google Scholar  * Hoogenboom, J. P. et al. Template induced growth of close-packed colloidal crystals during solvent evaporation. _Nano Lett._

4, 205–208 (2004). Article  Google Scholar  * Sun, S. & Murray, C. B. Synthesis of monodisperse cobalt nanocrystals and their assembly into magnetic superlattices. _J. Appl. Phys._ 85,

4325–4330 (1999). Article  Google Scholar  * Stoeva, S. I. et al. Face-centered cubic and hexagonal closed-packed nanocrystal superlattices of gold nanoparticles prepared by different

methods. _J. Phys. Chem. B_ 107, 7441–7448 (2003). Article  Google Scholar  * Sun, S., Murray, C. B., Weller, D., Folks, L. & Moser, A. Monodisperse FePt nanoparticles and ferromagnetic

FePt nanocrystal superlattices. _Science_ 287, 1989–1992 (2000). Article  Google Scholar  * Lisiecki, I., Albouy, P. A. & Pileni, M. P. Face-centered cubic “supracrystals” of cobalt

nanocrystals. _Adv. Mater._ 15, 712–716 (2003). Article  Google Scholar  * Wang, Z. L. Nanobelts, nanowires, and nanodiskettes of semiconducting oxides—from materials to nanodevices. _Adv.

Mater._ 15, 432–436 (2003). Article  Google Scholar  * Talapin, D. V. et al. A new approach to crystallization of CdSe nanoparticles into ordered three-dimensional superlattices. _Adv.

Mater._ 13, 1868–1871 (2001). Article  Google Scholar  * Shevchenko, E. V. et al. Colloidal synthesis and self-assembly of CoPt3 nanocrystals. _J. Am. Chem. Soc._ 124, 11480–11485 (2002).

Article  Google Scholar  * Soulantica, K., Maisonnat, A., Fromen, M. C., Casanove, M. J. & Chaudret, B. Spontaneous formation of ordered 3D super-lattices of nanocrystals from

polydisperse colloidal solutions. _Angew. Chem. Int. Edn Engl._ 42, 1945–1949 (2003). Article  Google Scholar  * Dumestre, F., Chaudret, B., Amiens, C., Renaud, P. & Fejes, P.

Superlattices of iron nanocubes synthesized from Fe[N(SiMe3)2]2 . _Science_ 303, 821–823 (2004). Article  Google Scholar  * Dumestre, F. et al. Unprecedented crystalline super-lattices of

monodisperse cobalt nanorods. _Angew. Chem. Int. Edn Engl._ 42, 5213–5216 (2003). Article  Google Scholar  * Duc, N. H., Danh, T. M., Tuan, N. A. & Teillet, J. Large magnetostrictive

susceptibility in Tb-FeCo/FeCo multilayers. _Appl. Phys. Lett._ 78, 3648–3650 (2001). Article  Google Scholar  * Cooke, M. D. et al. The effect of thermal treatment, composition and

substrate on the texture and magnetic properties of FeCo thin films. _J. Phys. D_ 33, 1450–1459 (2000). Article  Google Scholar  * Albert, F. J., Katine, J. A., Buhrman, R. A. & Ralph,

D. C. Spin-polarized current switching of a Co thin film nanomagnet. _Appl. Phys. Lett._ 77, 3809–3811 (2000). Article  Google Scholar  * Garcia-Miquel, H., Bhagat, S. M., Lofland, S. E.,

Kurlyandskaya, G. V. & Svalov, A. V. Ferromagnetic resonance in FeCoNi electroplated wires. _J. Appl. Phys._ 94, 1868–1872 (2003). Article  Google Scholar  * Willard, M. A., Laughlin, D.

E. & McHenry, M. E. Ferromagnetic resonnance and eddy currents in high-permeable thin films. _J. Appl. Phys._ 87, 7091–7096 (2000). Article  Google Scholar  * Corrias, A., Casula, M.

F., Falqui, A. & Paschina, G. Evolution of the structure and magnetic properties of FeCo nanoparticles in an alumina aerogel matrix. _Chem. Mater._ 16, 3130–3138 (2004). Article  Google

Scholar  * Tang, S. L. et al. Nanostructure and magnetic properties of Fe69Co31 nanowire arrays. _Chem. Phys. Lett._ 384, 1–4 (2004). Article  Google Scholar  * Zitoun, D. et al. Synthesis

and magnetism of Co_x_Rh1−_x_ and Co_x_Ru1−_x_ nanoparticles. _J. Phys. Chem. B_ 107, 6997–7005 (2003). Article  Google Scholar  * Margeat, O., Amiens, C., Chaudret, B., Lecante, P. &

Benfield, R. E. Chemical control of structural and magnetic properties of cobalt nanoparticles. _Chem. Mater._ 17, 107–111 (2005). Article  Google Scholar  * Dassenoy, F. et al. Experimental

evidence of structural evolution in ultrafine cobalt particles stabilized in different polymers. From a polytetrahedral arrangement to hexagonal structure. _J. Chem. Phys._ 112, 8137–8145

(2000). Article  Google Scholar  * Dinega, D. P. & Bawendi, M. G. A solution-phase chemical approach to a new crystal structure of cobalt. _Angew. Chem. Int. Edn_ 38, 1788–1791 (1999).

Article  Google Scholar  * Turgut, Z., Nuhfer, N. T., Piehler, H. R. & McHenry, M. E. Magnetic properties and microstructural observations of oxide coated FeCo nanocrystals before and

after compaction. _J. Appl. Phys._ 85, 4406–4408 (1999). Article  Google Scholar  * Turgut, Z., Huang, M.-Q., Gallagher, K., McHenry, M. E. & Majetich, S. A. Magnetic evidence for

structural phase transformation in FeCo nanpocrystals produced by a carbon arc. _J. Appl. Phys._ 81, 4039–4041 (1997). Article  Google Scholar  * Kechrakos, D. & Trohidou, K. N. Magnetic

properties of dipolar interacting single domain particles. _Phys. Rev. B_ 58, 12169–12177 (1998). Article  Google Scholar  * Otsuka, S. & Rossi, M. Synthesis, structure, and properties

of -cyclo-octenyl–cyclo-octa- 1,5-dienecobalt. _J. Chem. Soc. A_ 2630–2633 (1968). * Andersen, R. A. et al. Synthesis of bis[bis(trimethylsilyl)amido]iron(II). Structure and bonding in

M[N(SiMe3)2]2 (M=Mn,Fe,Co) : Two coordinate transition-metal amides. _Inorg. Chem._ 27, 1782–1786 (1988). Article  Google Scholar  Download references ACKNOWLEDGEMENTS The authors thank CNRS

and FREESCALE S. P. S. for support, M. Vincent Collière, Lucien Datas and TEMSCAN service (Université Paul Sabatier Toulouse) for TEM, Mlle Isabelle Fourquaux and Mr Bruno Payré (CMEAB,

Université Paul Sabatier Toulouse) for ultramicrotomy and Alain Mari for the magnetic measurements. AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Laboratoire de Chimie de Coordination du

CNRS, 205, route de Narbonne, 31077, Toulouse, Cedex 04, France Céline Desvaux, Catherine Amiens & Bruno Chaudret * Freescale Semiconductor, le Mirail BP 1029, 31023, Toulouse Cedex,

France Céline Desvaux & Philippe Renaud * Freescale Semiconductor, Inc., 2100 E. Elliot Road, Tempe, Arizona, 85824, USA Peter Fejes * Laboratoire de la Physique de la Matière Condensée,

INSA, 135 avenue de Rangueil, 31077, Toulouse, France Marc Respaud * Centre d’Elaboration des Matériaux et d’Etude Structurale, 29, rue Jeanne Marvig, BP94347, 31055, Toulouse, Cedex 04,

France Pierre Lecante & Etienne Snoeck Authors * Céline Desvaux View author publications You can also search for this author inPubMed Google Scholar * Catherine Amiens View author

publications You can also search for this author inPubMed Google Scholar * Peter Fejes View author publications You can also search for this author inPubMed Google Scholar * Philippe Renaud

View author publications You can also search for this author inPubMed Google Scholar * Marc Respaud View author publications You can also search for this author inPubMed Google Scholar *

Pierre Lecante View author publications You can also search for this author inPubMed Google Scholar * Etienne Snoeck View author publications You can also search for this author inPubMed 

Google Scholar * Bruno Chaudret View author publications You can also search for this author inPubMed Google Scholar CORRESPONDING AUTHOR Correspondence to Bruno Chaudret. ETHICS

DECLARATIONS COMPETING INTERESTS The authors declare no competing financial interests. SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION Supplementary figures S1, S2 and S3 (PDF 78 kb)

RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Desvaux, C., Amiens, C., Fejes, P. _et al._ Multimillimetre-large superlattices of air-stable iron–cobalt

nanoparticles. _Nature Mater_ 4, 750–753 (2005). https://doi.org/10.1038/nmat1480 Download citation * Received: 17 March 2005 * Accepted: 28 July 2005 * Published: 11 September 2005 * Issue

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