Size Dependence of the Electronic Properties of Tantalum Nanoclusters
https://doi.org/10.56304/S2079562923010244
Abstract
The results of studying the electronic states of tantalum nanoclusters on a silicon substrate by scanning tunneling spectroscopy are presented. Nanoclusters were obtained by the method of cluster deposition from the gas phase using magnetron sputtering of a tantalum target. Clusters were formed using a Nanogen-50 cluster source (Mantis Deposition) with a quadrupole mass filter integrated into the preparation chamber of the Omicron Multiprobe MXPS VT AFM-25 ultrahigh vacuum system. It has been established that for spherical nanoclusters of different sizes, the tunneling current differs significantly, the measured differential current-voltage characteristic of nanoclusters near the Fermi energy is nonmonotonic, which may indicate a change in the density of states near the Fermi energy. This change in the tunneling conductivity of nanoclusters depending on their size indicates the presence of a metal-nonmetal transition in metal nanoclusters on the semiconductor surface as the cluster size decreases.
Supporting agencies: The research was supported by a grant from the Russian Science Foundation (project No. 21-72-10054).
About the Authors
V. A. Shilov
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
Russian Federation
Russian Federation
K. M. Balakhnev
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
Russian Federation
Russian Federation
P. V. Borisuk
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
Russian Federation
Russian Federation
D. V. Bortko
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
Russian Federation
Russian Federation
O. S. Vasilyev
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
Russian Federation
Russian Federation
References
1. Hutter E., Fendler J.H. // Adv. Mater. 2004. V. 16 (19). P. 1685.
2. Reyna A.S., de Araújo C.B. // J. Optics. V. 24 (10). P. 104006.
3. Zhou B. et al. // Nat. Nanotechnol. 2015. V. 10 (11). P. 924.
4. Pan P. et al. // Angew. Chem. Int. Ed. 2022. V. 61 (50). P. e202213016.
5. Kuemmeth F. et al. // Nano Lett. 2008. V. 8 (12). P. 4506.
6. Mocatta D. et al. // Science. 2011. V. 332 (6025). P. 77.
7. Kano S., Tada T., Majima Y. // Chem. Soc. Rev. 2015. V. 44 (4). P. 970.
8. Борман В.Д. и др. // Письма в журнал экспериментальной и теоретической физики. 2007. Т. 86 (6). С. 450.
9. Buffat P., Borel J.P. // Phys. Rev. A. 1976. V. 13 (6). P. 2287.
10. Bifone A., Casalis L., Riva R. // Phys. Rev. B. 1995. V. 51 (16). P. 11043.
11. Bortko D.V. et al. // Phys. At. Nucl. 2022. V. 85 (12). P. 2115.
12. D’Addato S., Perricone F., Paolicelli G. // SN Appl. Sci. 2022. V. 4 (2). P. 65.
13. Barr E. T.L. Modern Escathe Principles and Practice of X-ray Photoelectron Spectroscopy. 1994. Boca Raton: CRC press.
Review
For citations:
Shilov V.A., Balakhnev K.M., Borisuk P.V., Bortko D.V., Vasilyev O.S. Size Dependence of the Electronic Properties of Tantalum Nanoclusters. Nuclear Physics and Engineering. 2024;15(1):98-104. (In Russ.) https://doi.org/10.56304/S2079562923010244
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