We have carefully deposited an alkali-like superatom consisting of a Ta-encapsulating Si16 cage, Ta@Si16, onto an inert graphite substrate, and have evaluated its chemical property and robustness by x-ray photoelectron spectroscopy. The result shows that both Ta and Si atoms consisting of the superatom have been well modelled with a single chemical component, revealing the formation of a symmetric Si cage around the Ta atom in the deposited nanoclusters. The deposited Ta@Si16 shows extreme stability for heating up to 700 K and oxygen exposure. The chemical robustness of Ta@Si16 nanoclusters shows the promising possibility of applying Ta@Si16 as a building block to construct novel nanodevices and catalyst utilizing their unique properties as superatom chemistry.
Nakajima Designer Nanocluster Assembly Project
Masahiro Shibuta, Tsutomu Ohta, Masato Nakaya, Hironori Tsunoyama, Toyoaki Eguchi, and Atsushi Nakajima. “Chemical Characterization of an Alkali-Like Superatom Consisting of a Ta-Encapsulating Si16 Cage”. Journal of the American Chemical Society, 2015, Advance Article, Published online October 29, 2015, doi: 10.1021/jacs.5b08035.
Atsushi Nakajima, Ph.D.
Research Director, “Nakajima Designer Nanocluster Assembly Project, JST-ERATO,” Professor, Keio University
Department of Research Project, JST