Polyelectrolyte and molecular host ion self-assembly to multilayer thin films: An approach to thin film chemical sensors

Yang, Xiaoguang; Johnson, S.; Shi, Jie; Holesinger, T. A.; Swanson, Basil I.

doi:10.1016/s0925-4005(97)00274-8

Cited by 72 publications

(47 citation statements)

References 21 publications

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“…3. Some standard polyelectrolytes frequently used for coatings grown by ESA electrolytes and tri-to tetravalent organic ions seem to be limiting cases 11,59,61,[79][80][81][82][83][84][85][86][87][88][89][90][91] . In such systems, successful deposition requires very carefully chosen parameters for the deposition process (see section: Experimental conditions and parameters).…”

Section: Polymers Suited For Esamentioning

confidence: 99%

“…Whereas low molar mass compounds seem to be able to permeate deeply into the films, the reaction of large molecules such as proteins or DNA fragments seems to be limited to the surface 350,452) . Also, the formation of inclusion complexes of host molecules fixed in the ESA-films needs to be worked out 59,147,298,299,357) . An interesting option of reactive ESA-films is their use as initiators for "grafting from" polymerization reactions 263) .…”

Section: Chemical Reactions In Films Made By Esamentioning

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.

1,175

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: Polymers Suited For Esamentioning

confidence: 99%

Section: Chemical Reactions In Films Made By Esamentioning

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.

1,175

1,184

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show abstract

“…[8] A film of a sulfonated calix [6]arene, which bears six hydrophobic dodecyl chains, showed sensitivity towards certain organic vapors as surface acoustic wave (SAW) devices. [9] In addition, polyions carrying opposite charges have been investigated. Dreja et al [10] used a host-guest type complex consisting of cyclodextrin (host) and a charged dye (guest) to fabricate a multilayer film of oppositely charged polyelectrolytes.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of an ESA Multilayer Film from a Diazo Resin by Direct Surface Charge Reversal

Zhang

Cao

2001

Macromol. Rapid Commun.

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“…Details of the synthesis route used to prepare these monolayer reagents are detailed in Reference [ 11. We have also been successful in preparing multilayer films using a variety of techniques [2,3]. The most successful of these is to covalently attach the CD and CA reagents to a polymer backbone which is, in turn, attached to a reactive S A M bonded to the surface of the transducer [4].…”

Section: Species Selective Thin Filmsmentioning

confidence: 99%

“…For 20ppm we measure a phase shift of 1.3" for a waveguide 1.5 cm in length. Using Equation 3, this corresponds to an effective index difference between the two modes of 1. lx I@'. In Fig.…”

Section: Optical Sensitivity Constantsmentioning

confidence: 99%

<title>Real-time chemical detection using species-selective thin films and waveguide Zeeman interferometry</title>

Grace

Shrouf

Honkanen

et al. 1998

Electro-Optical Technology for Remote Chemical Detection and Identification III

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Polyelectrolyte and molecular host ion self-assembly to multilayer thin films: An approach to thin film chemical sensors

Cited by 72 publications

References 21 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

Fabrication of an ESA Multilayer Film from a Diazo Resin by Direct Surface Charge Reversal

<title>Real-time chemical detection using species-selective thin films and waveguide Zeeman interferometry</title>

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