AI Article Synopsis
- - A gas-phase condensation cluster source generates size-selected Au cluster beams, achieving beam currents of up to 9.13 nA for small clusters and 80 pA for larger ones.
- - Scanning transmission electron microscopy reveals four metastable Au cluster structures: ino-decahedron (Dh), cuboctahedron (Fcc), and icosahedron (Ih), with cuboctahedron structures making up only 10-20% of the total.
- - Adjusting beam conditions can shift the cluster composition from Dh-dominant to Ih-dominant phases, enhancing control over nanoparticle properties beyond just size.
Article Abstract
A size-selected beam of Au clusters is generated in a gas-phase condensation cluster source equipped with a lateral time-of-flight mass selector. The beam current reaches up to 9.13 nA for small clusters and 80 pA for Au clusters, which are then analyzed using a scanning transmission electron microscope. Four types of metastable structures are observed for the Au clusters, including ino-decahedron (Dh), cuboctahedron and icosahedron (Ih). The proportion of bulk-favorable cuboctahedron ( face center cubic (Fcc)) structure takes up only 10-20%, while the penta-rotating symmetrical structures (Dh/Ih) are the dominant ones which take up over three quarters. Changing the beam condition may optimize the clusters from Dh-dominant to the Ih-dominant phase, which paves the way towards nanoparticle control beyond the diameters.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9418728 | PMC |
| http://dx.doi.org/10.1039/d0na00304b | DOI Listing |
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