Ferromagnetic Ordering in Superatomic Solids

Lee, Chul‐Ho; Liu, Lian; Bejger, Christopher; Turkiewicz, Ari; Goko, T.; Arguello, Carlos; Frandsen, Benjamin A.; Cheung, Sky C.; Medina, T.; Munsie, Timothy; D'Ortenzio, Robert; Luke, G. M.; Besara, Tiglet; Lalancette, Roger A.; Siegrist, T.; Stephens, Peter W.; Crowther, Andrew C.; Brus, L. E.; Matsuo, Yutaka; Nakamura, Eiichi; Uemura, Y. J.; Kim, Philip; Nuckolls, Colin; Steigerwald, Michael L.; Roy, Xavier

doi:10.1021/ja5098622

Cited by 64 publications

(56 citation statements)

References 35 publications

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“…These materials, which we term superatomic crystals, provide a bridge between traditional semiconductors, molecular solids, and nanocrystal arrays by combining tunability and atomic precision. Fullerenes have been particularly useful to produce collective properties in superatomic crystals, including ferromagnetic ordering, coherent thermal transport and semiconducting behavior …”

Section: Figurementioning

confidence: 99%

Dimerization of Endohedral Fullerene in a Superatomic Crystal

Voevodin

Abella

Castro

et al. 2017

Chemistry A European J

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We describe a solid state material created from the reaction of Ni9Te6(PEt3)8 and Lu3N@C80. The resulting superatomic crystal, [Ni12Te12(PEt3)8]2[(Lu3N@C80)2], contains dimers of Lu3N@C80 that form upon reduction of the fullerene through a single C−C bond at the triple hexagon junctions. The encapsulated Lu3N cluster displays an unprecedented orientation that is collinear and coplanar with the intercage carbon bond. Density functional theory calculations rationalize this unique bonding and relative orientation of the Lu3N clusters. Our structural and theoretical results provide new insights into the effect that the M3N cluster species has on the dimerization process of endohedral fullerenes.

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Section: Figurementioning

confidence: 99%

Dimerization of Endohedral Fullerene in a Superatomic Crystal

Voevodin

Abella

Castro

et al. 2017

Chemistry A European J

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“…7). 74 The properties of such materials need to be explored further since they extend our understanding of atoms. 70 What about further decreasing the size of the building unit?…”

Section: Crystal and Self-assemblymentioning

confidence: 99%

Nanostructure formation via post growth of particles

Wang

2015

CrystEngComm

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Post growth of particles will lead to new nanostructure formation, and blur the boundaries of crystal growth and molecular chemistry as well. The driving force of post growth usually stems from the inherent stabilities of the nanoparticles (NPs) and the environmental changes, which results in the transformation of the pristine nanostructures. One type of post growth driven by thermodynamic stability is Ostwald ripening, which usually leads to the elimination of small particles, and can be utilized to prepare hollow structures. By sophisticatedly controlling the reaction conditions, the NPs may undergo oriented attachment to form nanostructures with more complexity. This process is different from the random aggregation of nanoparticles; the final morphologies can be ingeniously controlled, and the kinetics resemble polymerization in some cases. If the chemical bonding during the oriented attachment process is replaced by non-covalent bonding, self-assembly of the NPs is achieved. Self-assembly of NPs further extends the diversity of nanostructures, as well as the understanding of crystallization. Post growth of particles is also a feasible strategy to fabricate heterostructures. The wetting behaviour sheds light on the final morphologies of the heterostructures. Meanwhile, seed mediated growth enables an alternative method to control pre-formed NPs. Another heterostructure of atomically-thin layered sheets connected via van der Waals forces also extends the potential of nanomaterials. The driving forces of the post growth of particles are divergent, and the applications are various. It can be utilized to prepare homogeneous and heterogeneous structures. CrystEngCommThis journal is

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“…12 These superatoms exhibit electronic characteristics similar to atoms and over the past years, superatoms mimicking a large variety of elements have been identified. [16][17][18][19][20][21] In particular, superatoms with closed electronic shells are found to be more stable but have higher ionization energies. Our first objective is to demonstrate how such units could be transformed into effective multiple electron donors.…”

Section: Introductionmentioning

confidence: 99%

Co6Se8(PEt3)6 superatoms as tunable chemical dopants for two-dimensional semiconductors

Reber

2018

npj Comput Mater

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Electronic, optoelectronic, and other functionalities of semiconductors are controlled by the nature and density of carriers, and the location of the Fermi energy. Developing strategies to tune these parameters holds the key to precise control over semiconductors properties. We propose that ligand exchange on superatoms can offer a systematic strategy to vary these properties. We demonstrate this by considering a WSe 2 surface doped with ligated metal chalcogenide Co 6 Se 8 (PEt 3 ) 6 clusters. These superatoms are characterized by valence quantum states that can readily donate multiple electrons. We find that the WSe 2 support binds more strongly to the Co 6 Se 8 cluster than the PEt 3 ligand, so ligand exchange between the phosphine ligand and the WSe 2 support is energetically favorable. The metal chalcogenide superatoms serves as a donor that may transform the WSe 2 p-type film into an ntype semiconductor. The theoretical findings complement recent experiments where WSe 2 films with supported Co 6 Se 8 (PEt 3 ) 6 are indeed found to undergo a change in behavior from p-to n-type. We further show that by replacing the PEt 3 ligands by CO ligands, one can control the electronic character of the surface and deposited species.

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Ferromagnetic Ordering in Superatomic Solids

Cited by 64 publications

References 35 publications

Dimerization of Endohedral Fullerene in a Superatomic Crystal

Dimerization of Endohedral Fullerene in a Superatomic Crystal

Nanostructure formation via post growth of particles

Co6Se8(PEt3)6 superatoms as tunable chemical dopants for two-dimensional semiconductors

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