Application of a functionalized parylene film as a linker layer of SPR biosensor

The surface plasmon resonance (SPR) biosensors have been used to detect various target analytes by using highly specific antigen–antibody interactions. In this work, a parylene film modified to have primary amine groups was applied as a linker layer of the SPR biosensor, and the primary amine groups...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2011-06, Vol.154 (2), p.89-95
Main Authors: Jeon, Byoung-Jin, Kim, Moo-Hwan, Pyun, Jae-Chul
Format: Article
Language:English
Subjects:
Covalent immobilization
Parylene
SPR biosensor
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Summary:The surface plasmon resonance (SPR) biosensors have been used to detect various target analytes by using highly specific antigen–antibody interactions. In this work, a parylene film modified to have primary amine groups was applied as a linker layer of the SPR biosensor, and the primary amine groups were used for the covalent immobilization of proteins to the SPR biosensor. The feasibility of the parylene film as a linker layer was presented by estimating the influence of the parylene film on the SPR measurement parameters, such as the sensitivity and the detection range. Then, a model protein called horseradish peroxidase (HRP) was used to demonstrate the improved immobilization efficiency as well as the sensitivity of the SPR biosensor with the parylene-A film. Additionally, a reconstruction method of the immunoaffinity layer was presented by using oxygen plasma.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2010.01.035