Tin clusters adopt prolate geometries
نویسندگان
چکیده
We have characterized the structures of Snn cations up to n568 using ion mobility measurements. Up to n;35, tin clusters track the prolate growth pattern previously found for Sin and Gen . However, the detailed size-dependent variations start deviating from those observed for Sin above n514 and Gen above n521. Over the n;35– 65 size range, tin clusters gradually rearrange towards near-spherical geometries, passing through several intermediate structural families. Two or three isomers are resolved for some sizes in the n518– 49 range. The observed geometries are independent of the He buffer gas temperature between 78 and 378 K and are not affected by collisional annealing. @S1050-2947~99!02608-6#
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تاریخ انتشار 1999