Mass selected cations of Ag-clusters are deposited, together with Ar seeded with CO (or other electron scavengers such as O, NO, or CCl), on a cold substrate, while being flooded with low energy electrons. Optical absorption measurements reveal an efficient trapping of Ag cluster cations in the Ar matrix, provided CO or another electron scavenger is present to ensure charge neutrality of the matrix. The spectrum of Ag thus obtained is in excellent agreement with previous predictions from quantum chemical calculations.
Simon Nessim Henein, Ramiro Tau
Florent Gérard Krzakala, Lenka Zdeborová