Electron Irradiation-driven charge state modulation in metal-intercalated SAMs
<p dir="ltr">Metal ion intercalation provides a powerful strategy to modulate the physical and electronic properties of molecular self-assembled monolayers (SAMs), with the charge state of the intercalated metal ions playing a critical role in determining system functionality. Here,...
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2025
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| _version_ | 1864513532030091264 |
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| author | Yongfeng Tong (3121338) |
| author2 | Manal Alsalama (17316895) Golibjon Berdiyorov (6325997) Hicham Hamoudi (1984285) |
| author2_role | author author author |
| author_facet | Yongfeng Tong (3121338) Manal Alsalama (17316895) Golibjon Berdiyorov (6325997) Hicham Hamoudi (1984285) |
| author_role | author |
| dc.creator.none.fl_str_mv | Yongfeng Tong (3121338) Manal Alsalama (17316895) Golibjon Berdiyorov (6325997) Hicham Hamoudi (1984285) |
| dc.date.none.fl_str_mv | 2025-11-03T12:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.apsusc.2025.165010 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Electron_Irradiation-driven_charge_state_modulation_in_metal-intercalated_SAMs/30819815 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Materials engineering Nanotechnology Electronic irradiation Molecular self-assembled monolayer Metal intercalation Charge transfer Molecular diode |
| dc.title.none.fl_str_mv | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">Metal ion intercalation provides a powerful strategy to modulate the physical and electronic properties of molecular self-assembled monolayers (SAMs), with the charge state of the intercalated metal ions playing a critical role in determining system functionality. Here, we demonstrate that electron irradiation can be employed as an external stimulus to control the charge state of metal ions within π-conjugated molecular SAMs on Au (111) substrates. Using copper-intercalated 5,5′-bis(mercaptomethyl)-2,2′-bipyridine (BPD) −based SAMs as a model system, we systematically investigate the effect of electron beam exposure on the valence state of copper ions. X-ray photoelectron spectroscopy reveals a progressive conversion of Cu2<sup>+</sup> to Cu<sup>+</sup> under electron irradiation, attributed to irradiation-induced molecular rearrangements that lower the metal coordination. Density functional theory calculations further indicate that external electrons promote crosslinking patterns stabilizing twofold metal coordination. These findings establish electron irradiation as a versatile tool for post-synthetic charge state modulation in metal-intercalated SAMs, enabling new routes to tailor nanoscale molecular electronic devices.</p><h2>Other Information</h2><p dir="ltr">Published in: Applied Surface Science<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.apsusc.2025.165010" target="_blank">https://dx.doi.org/10.1016/j.apsusc.2025.165010</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_72d5a1a7ef90856b5b97ac45e406a749 |
| identifier_str_mv | 10.1016/j.apsusc.2025.165010 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/30819815 |
| publishDate | 2025 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Electron Irradiation-driven charge state modulation in metal-intercalated SAMsYongfeng Tong (3121338)Manal Alsalama (17316895)Golibjon Berdiyorov (6325997)Hicham Hamoudi (1984285)EngineeringMaterials engineeringNanotechnologyElectronic irradiationMolecular self-assembled monolayerMetal intercalationCharge transferMolecular diode<p dir="ltr">Metal ion intercalation provides a powerful strategy to modulate the physical and electronic properties of molecular self-assembled monolayers (SAMs), with the charge state of the intercalated metal ions playing a critical role in determining system functionality. Here, we demonstrate that electron irradiation can be employed as an external stimulus to control the charge state of metal ions within π-conjugated molecular SAMs on Au (111) substrates. Using copper-intercalated 5,5′-bis(mercaptomethyl)-2,2′-bipyridine (BPD) −based SAMs as a model system, we systematically investigate the effect of electron beam exposure on the valence state of copper ions. X-ray photoelectron spectroscopy reveals a progressive conversion of Cu2<sup>+</sup> to Cu<sup>+</sup> under electron irradiation, attributed to irradiation-induced molecular rearrangements that lower the metal coordination. Density functional theory calculations further indicate that external electrons promote crosslinking patterns stabilizing twofold metal coordination. These findings establish electron irradiation as a versatile tool for post-synthetic charge state modulation in metal-intercalated SAMs, enabling new routes to tailor nanoscale molecular electronic devices.</p><h2>Other Information</h2><p dir="ltr">Published in: Applied Surface Science<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.apsusc.2025.165010" target="_blank">https://dx.doi.org/10.1016/j.apsusc.2025.165010</a></p>2025-11-03T12:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.apsusc.2025.165010https://figshare.com/articles/journal_contribution/Electron_Irradiation-driven_charge_state_modulation_in_metal-intercalated_SAMs/30819815CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/308198152025-11-03T12:00:00Z |
| spellingShingle | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs Yongfeng Tong (3121338) Engineering Materials engineering Nanotechnology Electronic irradiation Molecular self-assembled monolayer Metal intercalation Charge transfer Molecular diode |
| status_str | publishedVersion |
| title | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs |
| title_full | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs |
| title_fullStr | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs |
| title_full_unstemmed | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs |
| title_short | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs |
| title_sort | Electron Irradiation-driven charge state modulation in metal-intercalated SAMs |
| topic | Engineering Materials engineering Nanotechnology Electronic irradiation Molecular self-assembled monolayer Metal intercalation Charge transfer Molecular diode |