An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision

Abstract The stability of the molecular self-assembled monolayers (SAMs) is of vital importance to the performance of the molecular electronics and their integration to the future electronics devices. Here we study the effect of electron irradiation-induced cross-linking on the stability of self-ass...

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Autores principales:	Y. Tong, G. R. Berdiyorov, A. Sinopoli, M. E. Madjet, V. A. Esaulov, H. Hamoudi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f3bd0b603c954fa8bf795f91ed545bfa
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spelling	oai:doaj.org-article:f3bd0b603c954fa8bf795f91ed545bfa2021-12-02T17:40:49ZAn estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision10.1038/s41598-021-92077-32045-2322https://doaj.org/article/f3bd0b603c954fa8bf795f91ed545bfa2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92077-3https://doaj.org/toc/2045-2322Abstract The stability of the molecular self-assembled monolayers (SAMs) is of vital importance to the performance of the molecular electronics and their integration to the future electronics devices. Here we study the effect of electron irradiation-induced cross-linking on the stability of self-assembled monolayer of aromatic 5,5′-bis(mercaptomethyl)-2,2′-bipyridine [BPD; HS-CH2-(C5H3N)2-CH2-SH] on Au (111) single crystal surface. As a refence, we also study the properties of SAMs of electron saturated 1-dodecanethiol [C12; CH3-(CH2)11-SH] molecules. The stability of the considered SAMs before and after electron-irradiation is studied using low energy Ar+ cluster depth profiling monitored by recording the X-ray photoelectron spectroscopy (XPS) core level spectra and the UV-photoelectron spectroscopy (UPS) in the valance band range. The results indicate a stronger mechanical stability of BPD SAMs than the C12 SAMs. The stability of BPD SAMs enhances further after electron irradiation due to intermolecular cross-linking, whereas the electron irradiation results in deterioration of C12 molecules due to the saturated nature of the molecules. The depth profiling time of the cross-linked BPD SAM is more than 4 and 8 times longer than the profiling time obtained for pristine and BPD and C12 SAMs, respectively. The UPS results are supported by density functional theory calculations, which show qualitative agreement with the experiment and enable us to interpret the features in the XPS spectra during the etching process for structural characterization. The obtained results offer helpful options to estimate the structural stability of SAMs which is a key factor for the fabrication of molecular devices.Y. TongG. R. BerdiyorovA. SinopoliM. E. MadjetV. A. EsaulovH. HamoudiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Y. Tong G. R. Berdiyorov A. Sinopoli M. E. Madjet V. A. Esaulov H. Hamoudi An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision
description	Abstract The stability of the molecular self-assembled monolayers (SAMs) is of vital importance to the performance of the molecular electronics and their integration to the future electronics devices. Here we study the effect of electron irradiation-induced cross-linking on the stability of self-assembled monolayer of aromatic 5,5′-bis(mercaptomethyl)-2,2′-bipyridine [BPD; HS-CH2-(C5H3N)2-CH2-SH] on Au (111) single crystal surface. As a refence, we also study the properties of SAMs of electron saturated 1-dodecanethiol [C12; CH3-(CH2)11-SH] molecules. The stability of the considered SAMs before and after electron-irradiation is studied using low energy Ar+ cluster depth profiling monitored by recording the X-ray photoelectron spectroscopy (XPS) core level spectra and the UV-photoelectron spectroscopy (UPS) in the valance band range. The results indicate a stronger mechanical stability of BPD SAMs than the C12 SAMs. The stability of BPD SAMs enhances further after electron irradiation due to intermolecular cross-linking, whereas the electron irradiation results in deterioration of C12 molecules due to the saturated nature of the molecules. The depth profiling time of the cross-linked BPD SAM is more than 4 and 8 times longer than the profiling time obtained for pristine and BPD and C12 SAMs, respectively. The UPS results are supported by density functional theory calculations, which show qualitative agreement with the experiment and enable us to interpret the features in the XPS spectra during the etching process for structural characterization. The obtained results offer helpful options to estimate the structural stability of SAMs which is a key factor for the fabrication of molecular devices.
format	article
author	Y. Tong G. R. Berdiyorov A. Sinopoli M. E. Madjet V. A. Esaulov H. Hamoudi
author_facet	Y. Tong G. R. Berdiyorov A. Sinopoli M. E. Madjet V. A. Esaulov H. Hamoudi
author_sort	Y. Tong
title	An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision
title_short	An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision
title_full	An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision
title_fullStr	An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision
title_full_unstemmed	An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision
title_sort	estimation on the mechanical stabilities of sams by low energy ar+ cluster ion collision
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f3bd0b603c954fa8bf795f91ed545bfa
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An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision

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