Ellipsometry and x-ray reflectometry characterization of self-assembly process of polystyrenesulfonate and polyallylamine

Tronin, Andrey; Lvov, Yuri; Nicolini, Claudio

doi:10.1007/bf00657788

Cited by 45 publications

(41 citation statements)

References 12 publications

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“…Due to their transparency, glass and quartz are most suitable for the use of Vis-and UV-spectroscopy, as well as optical microscopy. Silicon wafers are well suited for ellipsometric studies 131,227,274,312,382) , and may serve for IR-spectroscopic investigations 64,125,383,384) as they are transparent in a wide IR-range. Also, their smooth surface renders them well suited for X-ray reflectivity studies 131,312,381,382,385) and for near-field microscopy.…”

Section: Useful Substratesmentioning

confidence: 99%

“…Silicon wafers are well suited for ellipsometric studies 131,227,274,312,382) , and may serve for IR-spectroscopic investigations 64,125,383,384) as they are transparent in a wide IR-range. Also, their smooth surface renders them well suited for X-ray reflectivity studies 131,312,381,382,385) and for near-field microscopy. For these purposes, mica 75,103,104,201,252,253,281,316,323,348,386,387) and float glass 19,80,131,180,182,184,185,388,389) present alternatives.…”

Section: Useful Substratesmentioning

confidence: 99%

See 1 more Smart Citation

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Bertrand

Jonas

Laschewsky³

et al. 2000

Macromol. Rapid Commun.

1,168

1,184

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A bit of historyThe key role of surfaces for many material properties as well as for many biological processes has been recognized now. Therefore, new strategies aim at the tailoring of the material's surface only -or of a thin surface layer, respectively -, while preserving the bulk properties of the underlying support. Particular emphasis has been given to the surface modification by polymers, in an attempt to extend the known versatility of polymer bulk materials to ultrathin films and coatings, and to prepare bulk-surface composite materials. The self-organization of polymers has been increasingly explored for the preparation of well-defined surfaces and interfaces in recent years, extending the use of the established methods of low molar mass compounds (for comparative reviews, see ref. 1-3)). With such techniques, polymer films are formed spontaneously on substrates, due to balanced interactions between substrate, polymer (or its precursor) and medium. Typically, very thin, often monomolecular layers are produced. Repetitive deposition steps provide a precise control over the total thickness of the coatings, in the range from a few angstroms up to the micrometer range. Moreover, the step-by-step procedures allow for a fine structuring in the third dimension. In addition to the preparation of uniform and homogeneous coatings, gratings, gradients or steps of defined height in molecular dimensions can be easily constructed.The most recent of the self-organization techniques is the alternating physisorption of oppositely charged polyelectrolytes, the so-called "layer-by-layer" method or "electrostatic self-assembly" (ESA) [3][4][5][6][7][8][9][10] . Although some early, singular studies of self-assembly by alternating adsorption of oppositely charged polyions are reported [11][12][13] , a practical method for ESA was developed Feature Article: The article presents the state-of-the-art of alternating physisorption of oppositely charged polyelectrolytes, the so-called "layer-by-layer" method or "electrostatic self-assembly" (ESA), for the preparation of thin polymer coatings. In comparison to other, more established self-organization techniques, this recent method is distinguished by its simplicity, versatility, and speed. In particular, the tendency for self-healing is unique. Emphasis is given to the role of the molecular structure of the polyelectrolytes, and to the nature of the support. Also, various parameters for the preparation of multilayer films are highlighted, which are very important due to the kinetic control of the build-up process. The structure of the resulting coatings, their quality and stability, chemical reactions in the films, and potential applications are discussed.Macromol. Rapid Commun. 21, No. 7

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Section: Useful Substratesmentioning

confidence: 99%

Section: Useful Substratesmentioning

confidence: 99%

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Bertrand

Jonas

Laschewsky³

et al. 2000

Macromol. Rapid Commun.

1,168

1,184

View full text Add to dashboard Cite

show abstract

“…This approach is very well suited to set a minimum distance between the fluorescent layer and the gold nanoparticles (AuNPs), since the thickness of the multilayer film increases linearly with the number of deposited bilayers. 26,39,46,[56][57][58][59] This versatile method is simple, well-established, and can be carried out at room temperature and on a variety of substrates. 26,39,45,60,61 The charged PE-coated surface is suitable to incorporate charged species such as metal nanoparticles and to introduce a buffer layer or barrier between them.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence enhancement in large-scale self-assembled gold nanoparticle double arrays

Chekini

Filter

Bierwagen

et al. 2015

Journal of Applied Physics

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Localized surface plasmon resonances excited in metallic nanoparticles confine and enhance electromagnetic fields at the nanoscale. This is particularly pronounced in dimers made from two closely spaced nanoparticles. When quantum emitters, such as dyes, are placed in the gap of those dimers, their absorption and emission characteristics can be modified. Both processes have to be considered when aiming to enhance the fluorescence from the quantum emitters. This is particularly challenging for dimers, since the electromagnetic properties and the enhanced fluorescence sensitively depend on the distance between the nanoparticles. Here, we use a layer-by-layer method to precisely control the distances in such systems. We consider a dye layer deposited on top of an array of gold nanoparticles or integrated into a central position of a double array of gold nanoparticles. We study the effect of the spatial arrangement and the average distance on the plasmon-enhanced fluorescence. We found a maximum of a 99-fold increase in the fluorescence intensity of the dye layer sandwiched between two gold nanoparticle arrays. The interaction of the dye layer with the plasmonic system also causes a spectral shift in the emission wavelengths and a shortening of the fluorescence life times. Our work paves the way for large-scale, high throughput, and low-cost self-assembled functionalized plasmonic systems that can be used as efficient light sources. V C 2015 AIP Publishing LLC. [http://dx

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“…Formation of thin films formed by sequential deposition of oppositely charged polyelectrolyte and small molecules is reported [17][18][19][20]. In this work formation of nonpolymeric ionic nanolayers consisting of small molecules with four or six charged functional groups has been studied by X-ray reflectometry measurements [15,21] utilizing Savitzky-Golay algorithm for the obtained XRR curves [22].…”

Section: Introductionmentioning

confidence: 99%

X‐Ray Reflectometry Study of Self‐Assembled Ionic Nanolayers

Jasiecki

Serafińczuk

Gotszalk

et al. 2012

Journal of Nanomaterials

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The self-assembly technique has been applied for the fabrication of thin films including macrocyclic molecules. These multilayered structures, grown by sequential deposition of oppositely charged molecules, were characterised with X-ray reflectometry. The data obtained indicate regular thickness of ion pair layers formed regardless of the number of depositions made as well as the number of ion groups occurring in the molecule. Savitzky-Golay algorithm was used for the calculation of the layer thickness. Formation of self-assembled multilayers (SAMs) occurs not only for polymeric structures but also for small ionic compound systems and results from the electrostatic interaction of many strongly dissipated charges on the whole structure of the molecule.

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Ellipsometry and x-ray reflectometry characterization of self-assembly process of polystyrenesulfonate and polyallylamine

Cited by 45 publications

References 12 publications

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Fluorescence enhancement in large-scale self-assembled gold nanoparticle double arrays

X‐Ray Reflectometry Study of Self‐Assembled Ionic Nanolayers

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