Charge Transfer Complexation of Ta-Encapsulating Ta@Si16 Superatom with C60

Tsutomu Ohta; Masahiro Shibuta; Hironori Tsunoyama; Toyoaki Eguchi; Atsushi Nakajima

doi:10.1021/acs.jpcc.6b04955

Charge Transfer Complexation of Ta-Encapsulating Ta@Si₁₆ Superatom with C₆₀

Tsutomu Ohta, Masahiro Shibuta, Hironori Tsunoyama, Toyoaki Eguchi, Atsushi Nakajima

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

The tantalum-encapsulating Si₁₆ cage nanocluster superatom (Ta@Si₁₆) has been a promising candidate for a building block of nanocluster-based functional materials. Its chemical states of Ta@Si₁₆ deposited on an electron acceptable C₆₀ fullerene film were evaluated by X-ray and ultraviolet photoelectron spectroscopies (XPS and UPS, respectively). XPS results for Si, Ta, and C showed that Ta@Si₁₆ combines with a single C₆₀ molecule to form the superatomic charge transfer (CT) complex, (Ta@Si₁₆)⁺C₆₀^-. The high thermal and chemical robustness of the superatomic CT complex has been revealed by the XPS and UPS measurements conducted before and after heat treatment and oxygen exposure. Even when heated to 720 K or subjected to ambient oxygen, Ta@Si₁₆ retained its original framework, forming oxides of Ta@Si₁₆ superatom.

Original language	English
Pages (from-to)	15265-15271
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	120
Issue number	28
DOIs	https://doi.org/10.1021/acs.jpcc.6b04955
Publication status	Published - 2016 Jul 21

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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abstract = "The tantalum-encapsulating Si16 cage nanocluster superatom (Ta@Si16) has been a promising candidate for a building block of nanocluster-based functional materials. Its chemical states of Ta@Si16 deposited on an electron acceptable C60 fullerene film were evaluated by X-ray and ultraviolet photoelectron spectroscopies (XPS and UPS, respectively). XPS results for Si, Ta, and C showed that Ta@Si16 combines with a single C60 molecule to form the superatomic charge transfer (CT) complex, (Ta@Si16)+C60-. The high thermal and chemical robustness of the superatomic CT complex has been revealed by the XPS and UPS measurements conducted before and after heat treatment and oxygen exposure. Even when heated to 720 K or subjected to ambient oxygen, Ta@Si16 retained its original framework, forming oxides of Ta@Si16 superatom.",

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AU - Tsunoyama, Hironori

AU - Eguchi, Toyoaki

AU - Nakajima, Atsushi

PY - 2016/7/21

Y1 - 2016/7/21

N2 - The tantalum-encapsulating Si16 cage nanocluster superatom (Ta@Si16) has been a promising candidate for a building block of nanocluster-based functional materials. Its chemical states of Ta@Si16 deposited on an electron acceptable C60 fullerene film were evaluated by X-ray and ultraviolet photoelectron spectroscopies (XPS and UPS, respectively). XPS results for Si, Ta, and C showed that Ta@Si16 combines with a single C60 molecule to form the superatomic charge transfer (CT) complex, (Ta@Si16)+C60-. The high thermal and chemical robustness of the superatomic CT complex has been revealed by the XPS and UPS measurements conducted before and after heat treatment and oxygen exposure. Even when heated to 720 K or subjected to ambient oxygen, Ta@Si16 retained its original framework, forming oxides of Ta@Si16 superatom.

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Charge Transfer Complexation of Ta-Encapsulating Ta@Si₁₆ Superatom with C₆₀

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