Synthesis of borophane polymorphs through hydrogenation of borophene
Abstract
Synthetic two-dimensional polymorphs of boron, or borophene, have attracted attention because of their anisotropic metallicity, correlated-electron phenomena, and diverse superlattice structures. Although borophene heterostructures have been realized, ordered chemical modification of borophene has not yet been reported. Here, we synthesize "borophane" polymorphs by hydrogenating borophene with atomic hydrogen in ultrahigh vacuum. Through atomic-scale imaging, spectroscopy, and first-principles calculations, the most prevalent borophane polymorph is shown to possess a combination of two-center-two-electron boron-hydrogen and three-center-two-electron boron-hydrogen-boron bonds. Borophane polymorphs are metallic with modified local work functions and can be reversibly returned to pristine borophene through thermal desorption of hydrogen. Finally, hydrogenation also provides chemical passivation because borophane reduces oxidation rates by more than two orders of magnitude after ambient exposure.
- Authors:
-
[1];
[2];
[1];
[3];
[1];
[4];
[5];
[5];
[6]
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA.
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA., Department of Materials Science and Engineering, University of Florida, 1885 Stadium Road, Gainesville, FL 32611, USA., Quantum Theory Project, University of Florida, 1885 Stadium Road, Gainesville, FL 32611, USA.
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA., Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA.
- Department of Materials Science and Engineering, University of Florida, 1885 Stadium Road, Gainesville, FL 32611, USA., Quantum Theory Project, University of Florida, 1885 Stadium Road, Gainesville, FL 32611, USA.
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA., Northwestern-Argonne Institute of Science and Engineering, 2205 Tech Drive, Evanston, IL 60208, USA.
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA., Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA., Department of Electrical and Computer Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR)
- OSTI Identifier:
- 1770505
- Alternate Identifier(s):
- OSTI ID: 1798336
- Grant/Contract Number:
- AC02-06CH11357; N00014-17-1-2993; DMR-1720139
- Resource Type:
- Published Article
- Journal Name:
- Science
- Additional Journal Information:
- Journal Name: Science Journal Volume: 371 Journal Issue: 6534; Journal ID: ISSN 0036-8075
- Publisher:
- American Association for the Advancement of Science (AAAS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Li, Qiucheng, Kolluru, Venkata Surya Chaitanya, Rahn, Matthew S., Schwenker, Eric, Li, Shaowei, Hennig, Richard G., Darancet, Pierre, Chan, Maria K. Y., and Hersam, Mark C. Synthesis of borophane polymorphs through hydrogenation of borophene. United States: N. p., 2021.
Web. doi:10.1126/science.abg1874.
Li, Qiucheng, Kolluru, Venkata Surya Chaitanya, Rahn, Matthew S., Schwenker, Eric, Li, Shaowei, Hennig, Richard G., Darancet, Pierre, Chan, Maria K. Y., & Hersam, Mark C. Synthesis of borophane polymorphs through hydrogenation of borophene. United States. https://doi.org/10.1126/science.abg1874
Li, Qiucheng, Kolluru, Venkata Surya Chaitanya, Rahn, Matthew S., Schwenker, Eric, Li, Shaowei, Hennig, Richard G., Darancet, Pierre, Chan, Maria K. Y., and Hersam, Mark C. Thu .
"Synthesis of borophane polymorphs through hydrogenation of borophene". United States. https://doi.org/10.1126/science.abg1874.
@article{osti_1770505,
title = {Synthesis of borophane polymorphs through hydrogenation of borophene},
author = {Li, Qiucheng and Kolluru, Venkata Surya Chaitanya and Rahn, Matthew S. and Schwenker, Eric and Li, Shaowei and Hennig, Richard G. and Darancet, Pierre and Chan, Maria K. Y. and Hersam, Mark C.},
abstractNote = {Synthetic two-dimensional polymorphs of boron, or borophene, have attracted attention because of their anisotropic metallicity, correlated-electron phenomena, and diverse superlattice structures. Although borophene heterostructures have been realized, ordered chemical modification of borophene has not yet been reported. Here, we synthesize "borophane" polymorphs by hydrogenating borophene with atomic hydrogen in ultrahigh vacuum. Through atomic-scale imaging, spectroscopy, and first-principles calculations, the most prevalent borophane polymorph is shown to possess a combination of two-center-two-electron boron-hydrogen and three-center-two-electron boron-hydrogen-boron bonds. Borophane polymorphs are metallic with modified local work functions and can be reversibly returned to pristine borophene through thermal desorption of hydrogen. Finally, hydrogenation also provides chemical passivation because borophane reduces oxidation rates by more than two orders of magnitude after ambient exposure.},
doi = {10.1126/science.abg1874},
journal = {Science},
number = 6534,
volume = 371,
place = {United States},
year = {Thu Mar 11 00:00:00 EST 2021},
month = {Thu Mar 11 00:00:00 EST 2021}
}
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