Imaging size-selected silicon clusters with a low-temperature scanning tunneling microscope

Size-selected Si30 and Si39 clusters produced by a laser vaporization cluster source are deposited on the Ag(111) surface at room temp. and at liq.-nitrogen temp. resp. Subsequently, the sample is transferred at low temp. (120 K) in a sep. mobile ultrahigh vacuum chamber (vacuum-suitcase) from the cluster source to a low-temp. scanning tunneling microscope (STM). Soft landing of the supported clusters is indicated by the following observations: (i) at.-resoln. images taken at low bias voltages show transparent Si clusters and an unperturbed Ag(111) substrate; (ii) manipulation expts. on the supported clusters and subsequently taken at.-resoln. images show a defect-free Ag(111) surface. In spite of the fact that the clusters are mass-selected in the gas phase, a statistical anal. of the STM images indicates a finite size-distribution on the support. This finding is attributed to the presence of different isomers and/or cluster orientations on the surface. [on SciFinder(R)]     «

Size-selected Si30 and Si39 clusters produced by a laser vaporization cluster source are deposited on the Ag(111) surface at room temp. and at liq.-nitrogen temp. resp. Subsequently, the sample is transferred at low temp. (120 K) in a sep. mobile ultrahigh vacuum chamber (vacuum-suitcase) from the cluster source to a low-temp. scanning tunneling microscope (STM). Soft landing of the supported clusters is indicated by the following observations: (i) at.-resoln. images taken at low bias voltages s...     »

CAN 134:33312 66-3 Surface Chemistry and Colloids Institut de Physique de la Matiere Condensee, Universite de Lausanne, Lausanne, Switz. Journal 0039-6028 7440-22-4 (Silver) Role: NUU (Other use, unclassified), USES (Uses) (imaging size-selected Si clusters on); 145810-87-3 (Silicon, mol. (Si30)); 145810-89-5 (Silicon, mol. (Si39)) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process) (imaging size-selected Si clusters with low-temp. scanning tunneling microscope)     «

CAN 134:33312 66-3 Surface Chemistry and Colloids Institut de Physique de la Matiere Condensee, Universite de Lausanne, Lausanne, Switz. Journal 0039-6028 7440-22-4 (Silver) Role: NUU (Other use, unclassified), USES (Uses) (imaging size-selected Si clusters on); 145810-87-3 (Silicon, mol. (Si30)); 145810-89-5 (Silicon, mol. (Si39)) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process) (imaging size-selected Si clusters with low-temp. scanning tunneling microsc...     »