Kostyukevych K. Multi-layer optical transducer based on the surface plasmon resonance effect in a thin gold film

Changes of structural and optical parameters of the biochemical transducer based on the surface plasmon resonance in a gold film as a result of thermal annealing and formation of both organic and non-organic layers. Shown is the necessity to anneal this film at 120°C, which result in smoothing a small-scale relief of the gold surface and obtaining optimal parameters of a resonance curve as well as in formation of defectless protective and stabilizing nano-dimensional layers. Studied is the mechanism of formation of gold thiolate and sulfide layers as well as a fibrinogen molecular film for protection of the gold surface. Suggested and realized is the method of controlling transducer selectivity connected with modification of gold surface with matrix consist of mercaptane molecules of various length and structure. The way of oriented fixation of a sensitive molecular layer using the cooper aminopentacyanoferrate layer is worked out.