Surface plasmon and guided optical wave microscopies

Aust, E.; Ito, Shinzaburo; Knoll, Wolfgang

doi:10.1002/sca.4950160312

Cited by 55 publications

(46 citation statements)

References 23 publications

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“…The measured reflectivity scans were compared with calculations for a model layer system by using the transfer matrix algorithm, based upon Fresnel's equations 1) . The variables in Fresnel's equations are the layer thickness and the dielectric constants of the materials.…”

Section: Resultsmentioning

confidence: 99%

“…Previously, it has been demonstrated that surface plasmon spectroscopy or waveguide spectroscopy are well suited to analyse thin 1,2) and thick 2,3) polymer films. Experiments have been reported with variable sample temperatures T in order to identify, e. g., the thickness dependence of the glass transition temperature T g of ultrathin PMMA layers 4) .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pressure dependence of thickness and refractive index of thin PMMA-films investigated by surface plasmon and optical waveguide spectroscopy

Kleideiter¹,

Lechner²,

Knoll³

1999

Macromol. Chem. Phys.

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SUMMARY: Total internal reflection (TIR) and attenuated total reflection (ATR) measurements in the Kretschmann configuration have been performed at 25 8C with poly(methyl methacrylate) (PMMA) films (of ca. 2.5 lm thickness) spincoated on top of a 50 nm thick gold layer, as a function of the applied hydrostatic pressure, ranging from p = 1 N 10 5 to 1 050 N 10 5 Pa. The analysis of guided optical modes allows for the separate determination of the refractive index n and the thickness d of the polymer films as a function of pressure. The pressure media in contact with the PMMA films were water, ethanol, and methanol. Thermodynamic theories for the density of solids and fluids in combination with the Lorentz-Lorenz equation for their optical properties fit the experimental data quite well.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressure dependence of thickness and refractive index of thin PMMA-films investigated by surface plasmon and optical waveguide spectroscopy

Kleideiter¹,

Lechner²,

Knoll³

1999

Macromol. Chem. Phys.

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“…The SPR setup was obtained from Resonant Probes (Goslar, Germany) (51). The sample cell is mounted on top of a -2 goniometer with the detector measuring the reflectivity changes as a function of the angle of incidence of the p-polarized incoming laser beam.…”

Section: Preparation Of the Metal Complex Of L With Cu(ii) And Ni(ii)mentioning

confidence: 99%

Intravesicular and intervesicular interaction by orthogonal multivalent host–guest and metal–ligand complexation

Lim

Crespo-Biel

Stuart

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

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Host vesicles composed of amphiphilic ␤-cyclodextrin CD1 recognize metal-coordination complexes of the adamantyl-functionalized ethylenediamine ligand L via hydrophobic inclusion in the ␤-cyclodextrin cavities at the vesicle surface. In the case of Cu(II) and L, the resulting coordination complex was exclusively CuL2, and the interaction with the host vesicles was intravesicular, unless the concentration of metal complex and vesicles was high (>0.1 mM). In the case of Ni(II) and L, a mixture was formed consisting of mainly NiL and NiL2, the interaction with the host vesicles was effectively intervesicular, and addition of the guest-metal complex resulted in aggregation of the vesicles into dense, multilamellar clusters even in dilute solution [1 M Ni(II)]. The metal-L complex could be eliminated by a strong chelator such as EDTA, and the intervesicular interaction could be suppressed by a competitor such as unmodified ␤-cyclodextrin. The result from this investigation is that the strongest metal-coordination complex [Cu(II) with L] binds exclusively intravesicularly, whereas the weakest metal-coordination complex [Ni(II) with L] binds predominantly intervesicularly and is the strongest interfacial binder. These experimental observations are confirmed by a thermodynamic model that describes multivalent orthogonal interactions at interfaces.self-assembly ͉ vesicles ͉ cyclodextrins M ultivalent, noncovalent interactions at the interface of cell membranes are involved in a variety of biological processes such as cell-cell signaling, pathogen identification, and inflammatory response (1). Multivalent binding events have collective properties that are qualitatively and quantitatively different from the contributing monovalent interactions. For example, multivalent interactions lead to higher binding affinities and can afford larger contact areas between surfaces (1-3). Multivalency can be conveniently described by an effective concentration (C eff ) term that represents a probability of interaction between two interlinked reactive or complementary entities and symbolizes the concentration of one of the reacting or interacting functionalities as experienced by its counterpart (4, 5). Versatile model systems to investigate multivalent noncovalent interactions at the dynamic interface between cell membranes and the surrounding aqueous solution include self-assembled monolayers (SAMs) (6-11), nanoparticles (12-14), solid-supported lipid bilayers (15, 16), and bilayer vesicles (17-19).Metal-ligand coordination has been exploited to generate complex molecular architectures with specific topology, high stability, and original properties in aqueous solution (16,20,21). The N-nitrilotriacetic acid-histidine interaction is particularly interesting in a biological context. N-nitrilotriacetic acidfunctionalized lipids (22, 23) and SAMs (24, 25) have been used to immobilize proteins through multivalent interactions. In a comparable approach, the multivalent binding of Cu(II) ions to a membrane-bound dansyl-ethylenediamine conjugat...

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“…Surface plasmon resonance has become an important technique in the area of biosensor research (17)(18)(19). In SPR measurements, a gold surface is needed as the substrate to allow the excitation of surface plasmons (17)(18)(19).…”

Section: Introductionmentioning

confidence: 99%

Phosphatidylserine/Cholesterol Bilayers Supported on a Polycation/Alkylthiol Layer Pair

Zhang¹,

Booth²,

Stroeve³

2000

Journal of Colloid and Interface Science

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Surface plasmon and guided optical wave microscopies

Cited by 55 publications

References 23 publications

Pressure dependence of thickness and refractive index of thin PMMA-films investigated by surface plasmon and optical waveguide spectroscopy

Pressure dependence of thickness and refractive index of thin PMMA-films investigated by surface plasmon and optical waveguide spectroscopy

Intravesicular and intervesicular interaction by orthogonal multivalent host–guest and metal–ligand complexation

Phosphatidylserine/Cholesterol Bilayers Supported on a Polycation/Alkylthiol Layer Pair

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