Ellipsometry, imaging

Z.H. Wang and G. Jin, A label-free multisensing immunosensor based on imaging ellipsometry. Anal. Chem. 75, 6119-6123 (2003). 

Howland, M. C. Szmodis, A. W. Sanii, B. Parikh, A. N., Characterization of physical properties of supported phospholipid membranes using imaging ellipsometry at optical wave lengths, Biophys. J. 2007, 92, 1306 1317... 

Two similar techniques to probe hydrodynamic behaviour have been recently developed by Horn et al. [33] and Gee and co-workers [34-37]. The measurements by Horn et al. employ interferometry to measure the shape of a mercury drop at the end of a microcapillary as it approaches a flat interface. The capillaries are much larger than those used in an LSFA, where the drop profile is recorded under hydrodynamic forces. The work by Gee [34-37] is similar but uses hydrocarbon drops and determines the separation using imaging ellipsometry/reflectometry. This method is useful for systems... 

Li Y-J, Zhang Y, Zhou F (2008) Sequential monitoring of film thickness variations with surface plasmon resonance imaging and imaging ellipsometry constructed with a single optical system. Anal Chem 80 891-897... 

Ellipsometry Spectroscopic ellipsometry Imaging ellipsometry Adsorbed amounts/coverages phase transitions thickness and refractive indices. Identification of interfacial molecules. Domain formation eind shape (coexisting phases) internal structure of condensed phases resolution O (1 gm). For interpretation in terms of molecular structure model profiles across the Interface are needed. Problems mono-layer anisotropy, and different profiles may match the experimental data additional (independent) information required. 

Brewster angle microscopy (BAM) As imaging ellipsometry. Restricted to interfaces exhibiting a Brewster angle of incidence. Resolution is that of optical microscopy. 

One of the first papers dealing with microscopic imaging ellipsometry is by R. Reiter, H. Motschmann, H. Orendi, A. Nemetz and W. Knoll, Langmuir 8 (1992) 1784. A detailed discussion of the design features of the imaging ellipsometer is given by M. Harke, R. Teppner, O. Schulz, H. Orendi and H. Motschmann, Rev. Set Instr. 68 (1997) 8. 

Figure 10. Imaging ellipsometry of rib instability near the reservoir meniscus...

Schild HG, Muthukumar M, Tirrell DA (1991) Cononsolvency in mixed aqueous-solutions of poly (W-isopropyacrylamide). Macromolecules 24 948-952 Schmaljohann D, Nitschke M, Schulze R, Eing A, Werner C, Eichhom K-J (2005) In situ study of thermoresponsive behavior of micropattemed hydrogel films by imaging ellipsometry. Langmuir 21 2317-2322... 

Beyond the working principle described so far, ellipsometry can also provide laterally resolved information. This is possible in a scanning process but also directly by imaging ellipsometry. The latter approach is illustrated, for example, by the work of Schmaljohann et al. [50] who exemplified the advantages of this technique for a micropattemed thermoresponsive coating. 

In order to understand the behavior of surfaces after surface modification, it is essential to examine their surface composition and structure in detail. A large number of techniques are available, and it is often desirable to combine several of these methods. The techniques used to monitor surface properties include scanning electron microscopy (SEM), optical profilometry, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), infrared (IR) spectroscopy, imaging ellipsometry, and water contact angle measurements. 

Laterally resolved information on the micrometre scale can be obtained directly without a scanning process by imaging ellipsometry. This was illustrated by Schmaljohann et al. (2005) who demonstrated the advantages of this technique for a micropattemed NiPAAm-based copolymer coating. 

Schmaljohann, D., Nitschke, M., Schulze, R., Ring, A., Werner, C., Eichhorn, K. J. (2005). In situ study of the thermoresponsive behavior of micropattemed hydrogel films by imaging ellipsometry. Langmuir, 21, 2317-2322. 

Up to date, diverse of ellipsometry has been developed, such as imaging ellipsometry [38-40], infrared spectroscopic ellipsometry [41-50], Mueller matrix ellipsometry [51-63], etc. Here, we wiU not make a full introduction about the developments of ellipsometry. As an example, a rotating-polarizer-analyzer ellipsometer (RPAE) will be introduced as follows. 

G. Jin, R. Jansson, and H. Arwin, Imaging ellipsometry revisited Developments for... 

Yu Y, Jin G (2005) Influence of electrostatic interaction on fibrinogen adsorption on gold studied by imaging ellipsometry combined with electrochemical methods. J Colloid Interface Sci 283 477 81... 

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