Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-05T15:30:24.103Z Has data issue: false hasContentIssue false

Sulfur Segregation and Surface Site Vacancy Compensation During Methanol to Methoxy Reactions on MoS2

Published online by Cambridge University Press:  27 December 2018

Prescott E. Evans*
Affiliation:
Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE68588-0299, U.S.A
Hae-Kyung Jeong
Affiliation:
Department of Physics, Institute of Basic Science, Daegu University, Gyeongsan712-714, Korea
Peter A. Dowben
Affiliation:
Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE68588-0299, U.S.A
*
Get access

Abstract

Sulfur loss from the surface of MoS2(0001) is observed following the adsorption of methanol on MoS2 at 86 K and subsequent annealing of MoS2 near 300 K. This sulfur loss, at the MoS2 surface, leads to suppression of inverse photoemission features characteristic of the unoccupied states associated with MoS2. This sulfur loss is counteracted by further annealing to 350 K, as is evident in the temperature dependent sulfur to molybdenum integrated X-ray photoemission intensity ratios near 300 to 350 K. Upon further annealing to 350 K, inverse photoemission additionally indicates a reestablishment of characteristic features associated with the unoccupied states of MoS2. These results are indicative of sulfur segregation to the surface and compensation of surface vacancy sites.

Type
Articles
Copyright
Copyright © Materials Research Society 2018 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Evans, P. E., Jeong, H. K., Hooshmand, Z., Le, D., Rawal, T. B., Alvillar, S. N., Bartels, L., Rahman, T. S., Dowben, P. A., J. Phys. Chem. C. 122 (18), 10042-10049 (2018)CrossRefGoogle Scholar
Le, D., Rawal, T. B., Rahman, T. S., J. Phys. Chem. C. 118 (10), 5346-5351 (2014)CrossRefGoogle Scholar
Ye, G., Gong, Y., Lin, J., Li, B., He, Y., Pantelides, S. T., Zhou, W., Vajtai, R., Ajayan, P. M., Nano. Lett. 16, 1097-1103 (2016)CrossRefGoogle Scholar
Makarova, M., Okawa, Y., Aono, M., J. Phys Chem. C. 116 (42), 22411-22416 (2012)CrossRefGoogle Scholar
Ma, Q., Odenthal, P. M., Mann, J., Le, D., Wang, C. S., Zhu, Y., Chen, T., Sun, D., Yamaguchi, K., Tran, T., Wurch, M., McKinley, J. L., Wyrick, J., Magnone, K., Heinz, T. F., Rahman, T. S., Kawakami, R., Bartels, L., J. Phys.: Condens. Matter. 25 (25), 252201 (2013)Google Scholar
Kunimori, K., Kawai, T., Kondow, T., Onishi, T., Tamaru, K., Surf. Sci. 46 (2), 567-576 (1974)CrossRefGoogle Scholar
Grabke, H. J., Viefhaus, H., in Surface Segregation Phenomena, edited by Dowben, P. A. and Miller, A. (CRC Press, Boca Raton, Fl, 1990) pp. 207-240Google Scholar
Zhang, X., Scott, T., Socha, T., Nielsen, D., Manno, M., Johnson, M., Yan, Y., Losovyj, T., Dowben, P., Aydil, E. S., Leighton, C., ACS Appl. Mater. Interfaces 7 (25), 14130-14139 (2015)CrossRefGoogle Scholar
Choi, J., Dowben, P. A., Pebley, S., Bune, A. V., Ducharme, S., Fridkin, V.M., Palto, S. P., Petukhova, N., Phys. Rev. Lett. 80, 1328-1311 (1998)CrossRefGoogle Scholar
McIlroy, D., Waldried, C., Zhang, J., Choi, J. W., Foong, F., Liou, S., Dowben, P., Phys. Rev. B: Condens. Matter. Mater. Phys. 54, 17438-17451 (1996)CrossRefGoogle Scholar
Zhang, Z., González, R., Diáz, G., Rosa, L. G., Ketsman, I., Zhang, X., Sharma, P., Gruverman, A., Dowben, P. A., J. Phys. Chem. C. 115 (26), 13041-13046 (2011)CrossRefGoogle Scholar
Wong, F., Godohaldo, P., Bonilla, M., Colon-Santana, J. A., Zhang, X., Sharma, P., Gruverman, A., Dowben, P. A., Rosa, L. G., RSC Adv. 4, 3020-3027 (2014)CrossRefGoogle Scholar
Smith, N. V., Rep. Prog. Surf. Sci. 51 (9), 1227-1294 (1988)CrossRefGoogle Scholar
Komesu, T., Le, D., Zhang, X., Ma, Q., Schwier, E. F., Kojima, Y., Zheng, M., Iwasawa, H., Shimada, K., Taniguchi, M., Bartels, L., Rahman, T. S., Dowben, P. A., Appl. Phys. Lett. 105, 241602 (2014)CrossRefGoogle Scholar