Surface plasmon resonance method: new applications to sorption kinetics analysis

Viktoras Vaičikauskas; Zigmas Balevičius; Ilja Ignatjev; Gintaras Valinčius

doi:10.1117/12.726478

25 January 2007 Surface plasmon resonance method: new applications to sorption kinetics analysis

Viktoras Vaičikauskas, Zigmas Balevičius, Ilja Ignatjev, Gintaras Valinčius

Proceedings Volume 6596, Advanced Optical Materials, Technologies, and Devices; 659610 (2007) https://doi.org/10.1117/12.726478
Event: Advanced Optical Materials, Technologies, and Devices, 2006, Vilnius, Lithuania

Abstract

In our previous work was showed that the SPR technique is very effective for in situ observation of the lipase interaction with MNFcP (9 merkaptononyl - 5' - ferrocenylpentanoate). However, the investigation was performed with only monochromatic 633nm light at the beginning and at the end of the reaction. In this work, the results of the investigation of the reaction kinetics using a tunable light source (&lgr;=600÷1400nm) are presented. Spectral measurements were accomplished with a commercial spectral ellipsometer GES-5 (SOPRA, France). It was demonstrated that this method is sufficiently sensitive for lipase interactions with a thin MNFcP layer (d=3.65nm). It was concluded that the experimental plasmon minimum shift is due to lipase sorption on the MNFcP and, as a result, causes an increase in the effective layer thickness. These results are important in understanding the interaction of these molecules and in determing their size and distribution on the surface.

Citation Download Citation

Viktoras Vaičikauskas, Zigmas Balevičius, Ilja Ignatjev, and Gintaras Valinčius "Surface plasmon resonance method: new applications to sorption kinetics analysis", Proc. SPIE 6596, Advanced Optical Materials, Technologies, and Devices, 659610 (25 January 2007); https://doi.org/10.1117/12.726478

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KEYWORDS

Surface plasmons

Gold

Refractive index

Interfaces

Metals

Dielectrics

Prisms

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