Surface plasmon resonance within ion implanted silver clusters |
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| Authors: | G. Steiner M. T. Pham Ch. Kuhne R. Salzer |
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| Affiliation: | (1) Technische Universit?t Dresden, Institut für Analytische Chemie, D-01062 Dresden, Germany, DE;(2) Forschungszentrum Rossendorf e.V., Institut für Ionenstrahlphysik und Materialforschung, D-01034 Dresden, Germany, DE |
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| Abstract: | Surface plasmon resonance (SPR) belongs to the most sensitive indicators for changes in analyte concentrations or other sample properties, which depend on the refractive index in the medium. Surface plasmons represent collective electron oscillations in metal cluster or metal layers of diameter or thickness in the nanometer range. Such layers or clusters are used in many optical sensors in order to enhance the interaction between electromagnetic radiation and analyte. Clusters are preferred to enhance Raman scattering and IR absorption, whereas layers are used for SPR in the visible range. We tested the applicability of ion implanted clusters in order to enhance the stability of the metal coatings of the SPR sensor elements. A model based on the effective media theory was developed in order to enhance the sensor capabilities. The potential of the SPR with ion implanted metal clusters consists in durable resonance layers for biochemical sensors. Received: 21 December 1997 / Revised: 6 March 1998 / Accepted: 12 March 1998 |
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