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Determination of the Thickness of Interfacial Water by Time-Resolved Sum-Frequency Generation Vibrational Spectroscopy

التفاصيل البيبلوغرافية
العنوان: Determination of the Thickness of Interfacial Water by Time-Resolved Sum-Frequency Generation Vibrational Spectroscopy
المؤلفون: Junjun Tan, Mengmeng Wang, Jiahui Zhang, Shuji Ye
سنة النشر: 2023
مصطلحات موضوعية: Biophysics, Biochemistry, Infectious Diseases, Computational Biology, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, β protein interfaces, scarce experimental methods, oh stretching mode, electrical double layer, dppg lipid bilayer, ∼ 3 å, ≤ 3 å, iw , 15 , 1 , ≥ 9 å, 9 å, ≥ 0, ≤ 0, >< sub, ssp polarizations, space (<, resolved sum, quantitatively describe, novel tool, like feature, like dynamics, interfacial topography
الوصف: The physics and chemistry of a charged interface are governed by the structure of the electrical double layer (EDL). Determination of the interfacial water thickness ( d iw ) of the charged interface is crucial to quantitatively describe the EDL structure, but it can be utilized with very scarce experimental methods. Here, we propose and verify that the vibrational relaxation time ( T 1 ) of the OH stretching mode at 3200 cm –1 , obtained by time-resolved sum frequency generation vibrational spectroscopy with ssp polarizations, provides an effective tool to determine d iw . By investigating the T 1 values at the SiO 2 /NaCl solution interface, we established a time-space ( T 1 – d iw ) relationship. We find that water has a T 1 lifetime of ≥0.5 ps for d iw ≤ 3 Å, while it displays bulk-like dynamics with T 1 ≤ 0.2 ps for d iw ≥ 9 Å. T 1 decreases as d iw increases from ∼3 Å to 9 Å. The hydration water at the DPPG lipid bilayer and LK 15 β protein interfaces has a thickness of ≥9 Å and shows a bulk-like feature. The time–space relationship will provide a novel tool to pattern the interfacial topography and heterogeneity in Ångstrom-depth resolution by imaging the T 1 values.
نوع الوثيقة: article in journal/newspaper
اللغة: unknown
Relation: https://figshare.com/articles/journal_contribution/Determination_of_the_Thickness_of_Interfacial_Water_by_Time-Resolved_Sum-Frequency_Generation_Vibrational_Spectroscopy/24747415
DOI: 10.1021/acs.langmuir.3c02906.s001
الاتاحة: https://doi.org/10.1021/acs.langmuir.3c02906.s001
https://figshare.com/articles/journal_contribution/Determination_of_the_Thickness_of_Interfacial_Water_by_Time-Resolved_Sum-Frequency_Generation_Vibrational_Spectroscopy/24747415
Rights: CC BY-NC 4.0
رقم الانضمام: edsbas.67A04627
قاعدة البيانات: BASE
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