Ultrasmall Metal Clusters Act Metallic | February 7, 2011 Issue - Vol. 89 Issue 6 | Chemical & Engineering News
 
 
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Volume 89 Issue 6 | p. 27 | Concentrates
Issue Date: February 7, 2011

Ultrasmall Metal Clusters Act Metallic

Bucking prior theory, sodium clusters with as few as three atoms have metallic character analogous to bulk metals
Department: Science & Technology
Keywords: metal cluster, dipole moment, superatom, electric field

Metal clusters with as few as three atoms have metallic character analogous to bulk metals, according to experiments done at Georgia Institute of Technology (Phys. Rev. Lett., DOI: 10.1103/physrevlett­.106.043401). A classical metal is one that can’t support an internal electric field and therefore has no permanent electric dipole moment. Theoretical analysis had predicted that small clusters would show a dipole moment and therefore should not be considered metallic, even for a traditional metal . . .

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