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Schematic representation of a LMIS jet shrinking by steps down to the atomic size of the thinnest nanowire. In inset, the atomic geometry of the tip are displayed either for Au or for Ge and Sn.
LMIS mass spectrum: (a) the pure Ge case and (b) the Au-Ge alloy case. Note that the different isotopic compositions in Ge clusters can clearly appear in the structure of the different peaks. The LMIS emission current is in Figs. 2(a) and 2(b).
Partial LMIS mass spectrum of the Au-Si alloy case. The LMIS emission current is , respectively.
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