Co‐deposition of Atomic Clusters of Different Size and Composition

Abstract

The creation of tailored films of size‐selected metal clusters of mixed size and composition is reported. The TEM image shows Au10 000 and Au330 nanoclusters co‐deposited on amorphous carbon. At room temperature the different cluster sizes are present but coalescence is observed at 200 °C. High‐angle annular dark‐field imaging allows the gold and silver clusters to be distinguished by the intensity difference. These innovative cluster systems demonstrate new ways to investigate and utilize the properties of selected combinations of nanoclusters with desired size and composition.

Size Selected Clusters on Surfaces

“…The growth pattern of lead sulfide cluster structures via dimerization of (PbS) 4n units. For (PbS) 16 and (PbS) 32 , both, the lowest, (a), and higher, ((b) and (c)), energy isomers are shown. The chemical compositions of lead sulfide clusters were confirmed by in situ XPS measurements.…”

“…However, controlling the ultimate size, structure, and therefore functionality of deposited clusters created by this means relies on understanding the relationships between the size of the incident gas phase clusters and the nature of the deposited clusters, determined by cluster-cluster and cluster-surface interactions [8; 9]. Our knowledge of the structures that gas phase clusters adopt on solid surfaces comes predominantly from studies on metal clusters deposited by soft-landing, or, in a few cases, low energy ion beam deposition on atomically smooth surfaces such as highly ordered pyrolytic graphite (HOPG) and mica [10][11][12][13][14][15][16][17]. In general, the surface structures formed have been found to depend on the size of the incident gas phase clusters.…”

Compositional changes of Pd-Au bimetallic nanoclusters upon hydrogenation

“…Furthermore, the signal is also sensitive to the difference in atomic number, which is called Z-sensitivity. This Z-sensitivity can also be used to distinguish between different elements in nanoclusters 13 allowing the compositional determination from the HAADF intensity alone.…”

Gold nanoparticles for applications in energy and environment: synthesis and characterization

“…Size selected positively charged Au clusters were generated through gas phase condensation and size selection processes using a magnetron sputtering cluster source and lateral time-of-flight mass filter described previously and operated at resolution of ( ) M M Δ~ 25 [9][10]. MgO cubes [11] on holey amorphous carbon film are used as substrates for Au 80 cluster deposition.…”