SERS study of the conformational transition of the ordering of lipid molecules deposited on a silver electrode

Guo, F. C.; Chou, Y. C.; Huang, Wei-Ching; Wu, Wen‐guey

doi:10.1002/jrs.1250230802

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…The bands at ca. 1432 and 1452 cm −1 are assigned to CH 2 scissoring modes and bands of 1390 cm −1 corresponds to CH 2 wagging mode (w(CH 2 )) [13,[26][27][28]. The broad bands at 1590 cm −1 are assigned to graphitic carbon originating from a photochemical reaction between CO 2 present in air or water and the silver layer [29,30].…”

Section: Sers Of Oda Langmuir Monolayermentioning

confidence: 99%

Structural properties and Raman spectroscopy of lipid Langmuir monolayers at the air–water interface

Dai

Zhang

et al. 2005

Colloids and Surfaces B: Biointerfaces

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Spectra of octadecylamine (ODA) Langmuir monolayers and egg phosphatidylcholine (PC)/ODA-mixed monolayers at the air-water interface have been acquired. The organization of the monolayers has been characterized by surface pressure-area isotherms. Application of polarized optical microscopy provides further insight in the domain structures and interactions of the film components. Surface-enhanced Raman scattering (SERS) data indicate that enhancement in Raman spectra can be obtained by strong interaction between headgroups of the surfactants and silver particles in subphase. By mixing ODA with phospholipid molecules and spreading the mixture at the air-water interface, we acquired vibrational information of phospholipid molecules with surfactant-aided SERS effect.

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Section: Sers Of Oda Langmuir Monolayermentioning

confidence: 99%

Structural properties and Raman spectroscopy of lipid Langmuir monolayers at the air–water interface

Dai

Zhang

et al. 2005

Colloids and Surfaces B: Biointerfaces

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“…Studies of phospholipid films in dispersions, Langmuir layers, and Langmuir–Blodgett layers are well documented as biological membrane models 1. These assemblies have been studied by a wide range of techniques including NMR spectroscopy,2–14 X‐ray and electron diffraction,15–17 fluorescence spectroscopy,18–32 optical and spectroscopic microscopy,20, 22, 24, 33 scanning probe microscopies,34–37 and the vibrational spectroscopies FTIR,38–51 Raman,42, 52–63 and vibrational sum‐frequency generation 64–66. The vibrational spectroscopies provide much needed data about molecular structure and interactions between lipid molecules in such assemblies, particularly for the alkyl chain.…”

Section: Introductionmentioning

confidence: 99%

Raman spectroscopy of model membrane monolayers of dipalmitoylphosphatidic acid at the air-water interface using surface enhancement from buoyant thin silver films

Pemberton

Chamberlain

2000

Biopolymers

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A novel method for the acquisition of surface enhanced Raman (SER) spectra of model membranes of dipalmitoylphosphatidic acid (DPPA) in Langmuir layers at the air–water interface is reported. The approach is based on the electrochemical formation of a buoyant thin layer of coalesced silver colloids in the vicinity of the phosphatidic acid head groups at the interface. This Ag layer is an excellent platform for SER scattering, which shows the spectral features from all parts of the molecule and water between the Ag surface and the DPPA layer. The observation of the spectral response from the phosphatidic acid head groups is of particular significance, allowing insight into their chemical state and orientation at the air–water interface. © 2000 John Wiley & Sons, Inc. Biopolymers (Biospectroscopy) 57: 103–116, 2000

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“…Because SERS relates to the surface phenomenon and is more complicated process than normal Raman scattering, many factors set the SERS profile. For instance, the changes of adsorbate/analyte spectral features can be caused by any of the following reasons: molecule reorientation, conformational transitions, protonation of functional group, coadsorption of ions, and so forth . In a number of recent studies, it was found that an aggregation of metal nanoparticles also can induce the changes of SERS profile .…”

Section: Introductionmentioning

confidence: 99%

Surface‐enhanced Raman scattering of 4,4'‐diaminostilbene: Dependence of spectral features and resonant enhancement on surface coverage

Solovyeva

2019

J Raman Spectroscopy

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At any applications of surface‐enhanced Raman scattering (SERS) spectroscopy, from detection of small ions to recognition of large biological molecules, an understanding the spectral profiles and its transformation occurring under changes of local environment is an important stage essential for a reliable chemical analysis. In this work, we showed that the adsorption of 4,4'‐diaminostilbene on Ag nanoparticles is accompanied by a dramatic change in the SERS profile observed at transition from submonolayer to multilayer coverage. A profile deconvolution analysis allowed revealing the spectral signatures inherent for the surface species existing at submonolayer and multilayer adsorption corresponding to the hot spots and ordinary conditions, respectively. A resonance character of Raman enhancement was detected in the case of 4,4'‐diaminostilbene adsorbed in hot spots regions. A feasibility of ligand to metal charge transfer was proved on the basis of ultraviolet–visible data. The overtones and combination bands were observed in the SERS spectra at resonance conditions. The spectral signatures of the molecules inside and outside hot spots regions were assigned. A considerable activation of rings vibrations together with a suppression of ethylenic bridge vibrations was revealed in both cases. The most prominent features of 4,4'‐diaminostilbene linked with two Ag nanoparticles in the range 200–1,800 cm‐1 are the medium bands at 581 and 1249 cm‐1 corresponding to CCC bending and C–N stretching modes, respectively. The obtained results can serve as a basis for development of new powerful Raman techniques for evaluation of surface coverage and “hot spots mapping,” which are of great interest for surface science and plasmonics.

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SERS study of the conformational transition of the ordering of lipid molecules deposited on a silver electrode

Cited by 4 publications

References 18 publications

Structural properties and Raman spectroscopy of lipid Langmuir monolayers at the air–water interface

Structural properties and Raman spectroscopy of lipid Langmuir monolayers at the air–water interface

Raman spectroscopy of model membrane monolayers of dipalmitoylphosphatidic acid at the air-water interface using surface enhancement from buoyant thin silver films

Surface‐enhanced Raman scattering of 4,4'‐diaminostilbene: Dependence of spectral features and resonant enhancement on surface coverage

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