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,...
محفوظ في:
| المؤلف الرئيسي: | |
|---|---|
| مؤلفون آخرون: | , , |
| منشور في: |
2025
|
| الموضوعات: | |
| الوسوم: |
إضافة وسم
لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!
|
| الملخص: | <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> |
|---|