Coatings waveguide

Mittler S (2006) Gold coated waveguide sensors. In Grimes CA (ed) Encyclopedia of sensors, 4th edn. American Scientific, California, pp 239-259... 

Figure 3. Typical dynamic response of the vlologen-coated waveguide exposed alternately to distilled water/sodlum dlthlonlte solutions.

Figure 4. Colorimetric detection of the formate ion for the dual film coated waveguide.

An alternative approach to remote mid infra-red spectroscopy is presented which utilises gold-coated waveguides instead of fibre optics and which could be used for in-situ real-time process control in practically any environment. The principle objects of the paper are to describe a novel experimental set-up for remote mid infra-red spectroscopy recently assembled in laboratory, and to demonstrate the qualitative and quantitative analysis of the remote mid infra-red data using a multifunctional epoxy/amine formulation as an example. 18 refs. 

Sftniin AHsorptinn F Tgp<>riiin>iits. Nonspecific protein adsorpHon fixmi human serum was tested in a series of experiments on Nb20s-coated waveguides. Bioaffinity assays were carried out in HEPES-2 buffer, as described in sections 2.4.1 and... 

For comparison, serum adsorpHon was also tested on a clean Nb205-coated waveguide and on a NbsOs-coated wav uide that... 

Figure 3. In situ measurement of the adsorption of PLL(20)-g[4.1]-PEG(l) from solution on a Nb206-coated waveguide chip and subsequent exposure to human blood serum, monitored by OWLS. A10 mM HEPES buffer solution (pH 7.4) was used for both polymer adsorption and for the rinse between the different adsorption steps. (For simplification, the adsorption curve shown here does not include the additional rinse with a higher ionic strength solution, following pol3mier adsorption, as discussed in section 2.)...

Figure 1. Schematic view of the molecular assembly monolayer of the polycationic polymer PLL-g-PEG/PEG-NlA on a negatively charged Nb20s-coated waveguide chip. The GFPuv-6His is shown to be attached via the six adjacent histidine residues to three and two Ni-NTA comple s, with the NTA covalently bound to the end of the long PEC chains (molecular weight T4 kDaj. Thenon-Rinctionalized PEG chains have a molecular weight of 2 kDa. The magnified inset shows details of the NTA-Ni"/ 6x His-tag interaction.

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