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Development of a charge-implicit ReaxFF for C/H/O systems
Modeling chemical reactions in condensed phases is difficult. Interaction potentials (or force fields) like ReaxFF can perform this modeling with a high overall accuracy, but the disadvantage of ReaxFF is a low simulation speed arising from costly algorithms, in particular charge equilibration. Therefore, we reparametrized ReaxFF to incorporate Coulomb forces into other terms of the force field. Because of this change, our charge-implicit ReaxFF-CHO is >2 times faster than the original parametrization. Despite the lack of explicit electrostatic interactions, our potential can correctly model the reactions and densities of systems containing carbon, hydrogen, and oxygen atoms. We have used the new potential to simulate bombardment of trehalose by water clusters. It has been observed experimentally that these water projectiles can increase the sensitivity of secondary ion mass spectrometry by more than an order of magnitude, but no explanation for this phenomenon was given. Our simulations show that the increase in the intensity of the recorded signal coincides with the emission of trehalose–water complexes.
cris.lastimport.scopus | 2024-04-07T15:26:57Z | |
cris.lastimport.wos | 2024-04-10T03:23:22Z | |
dc.abstract.en | Modeling chemical reactions in condensed phases is difficult. Interaction potentials (or force fields) like ReaxFF can perform this modeling with a high overall accuracy, but the disadvantage of ReaxFF is a low simulation speed arising from costly algorithms, in particular charge equilibration. Therefore, we reparametrized ReaxFF to incorporate Coulomb forces into other terms of the force field. Because of this change, our charge-implicit ReaxFF-CHO is >2 times faster than the original parametrization. Despite the lack of explicit electrostatic interactions, our potential can correctly model the reactions and densities of systems containing carbon, hydrogen, and oxygen atoms. We have used the new potential to simulate bombardment of trehalose by water clusters. It has been observed experimentally that these water projectiles can increase the sensitivity of secondary ion mass spectrometry by more than an order of magnitude, but no explanation for this phenomenon was given. Our simulations show that the increase in the intensity of the recorded signal coincides with the emission of trehalose–water complexes. | pl |
dc.affiliation | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego | pl |
dc.contributor.author | Kański, Michał - 187198 | pl |
dc.contributor.author | Hrabar, Sviatoslav - 408198 | pl |
dc.contributor.author | van Duin, Adri C. T. | pl |
dc.contributor.author | Postawa, Zbigniew - 100132 | pl |
dc.date.accessioned | 2022-02-19T08:51:54Z | |
dc.date.available | 2022-02-19T08:51:54Z | |
dc.date.issued | 2022 | pl |
dc.date.openaccess | 0 | |
dc.description.accesstime | w momencie opublikowania | |
dc.description.number | 2 | pl |
dc.description.physical | 628-633 | pl |
dc.description.version | ostateczna wersja wydawcy | |
dc.description.volume | 13 | pl |
dc.identifier.doi | 10.1021/acs.jpclett.1c03867 | pl |
dc.identifier.eissn | 1948-7185 | pl |
dc.identifier.uri | https://ruj.uj.edu.pl/xmlui/handle/item/288349 | |
dc.language | eng | pl |
dc.language.container | eng | pl |
dc.rights | Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa | * |
dc.rights.licence | CC-BY | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/legalcode.pl | * |
dc.share.type | inne | |
dc.subtype | Article | pl |
dc.title | Development of a charge-implicit ReaxFF for C/H/O systems | pl |
dc.title.journal | The Journal of Physical Chemistry Letters | pl |
dc.type | JournalArticle | pl |
dspace.entity.type | Publication |
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Except as otherwise noted, this item is licensed under the Attribution 4.0 International licence