H. Mori et al., DESIGN OF AN ATOM-CLUSTER GENERATOR FOR A TRANSMISSION ELECTRON-MICROSCOPE AND IN-SITU OBSERVATION OF THE DEPOSITION PROCESS OF LARGE ATOM CLUSTERS, Journal of vacuum science & technology. B, Microelectronics and nanometer structures processing, measurement and phenomena, 12(4), 1994, pp. 2462-2464
An atom-cluster generator which can be set in the specimen chamber of
a transmission electron microscope has been designed and constructed.
The generator essentially consists of two vacuum chambers; one is the
chamber for differential pumping and the other the cluster source cham
ber. The former plays an essential role in keeping the column of a mic
roscope in a high vacuum. The latter is kept in a gas atmosphere and n
m-sized metal clusters are produced in this chamber by evaporating a m
etal element from a tungsten filament. With this apparatus, preliminar
y in situ deposition experiments were carried out, and it was observed
that isolated gold clusters, ejected from the atom-cluster generator,
landed sequentially on a substrate.