title: A new surface plasmon resonance sensor for high-throughput screening applications.
abstract: We report a new high-throughput surface plasmon resonance (SPR) sensor based on combination of SPR imaging with polarization contrast and a spatially patterned multilayer SPR structure. We demonstrate that this approach offers numerous advantageous features including high-contrast SPR images suitable for automated computer analysis, minimum crosstalk between neighboring sensing channels and inherent compensation for light level fluctuations. Applications of a laboratory prototype of the high-throughput SPR sensor with 108 sensing channels for refractometry and biosensing are described. In refractometric experiments, the noise-limited refractive index resolution of the system has been established to be 3 x 10(-6) refractive index unit (RIU). Experimental data on detection of human choriogonadotropin (hCG) suggest that in conjunction with monoclonal antibodies against hCG, the reported SPR imaging sensor is capable of detecting hCG at concentrations lower than 500 ng/ml.
authors.affiliation: Institute of Radio Engineering and Electronics, Academy of Sciences of the Czech Republic, Chaberská 57, 18251 Prague, Czech Republic.
authors.forename: Marek
authors.initials: M
authors.lastname: Piliarik
authors.forename: Hana
authors.initials: H
authors.lastname: Vaisocherová
authors.forename: Jirí
authors.initials: J
authors.lastname: Homola
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D006063:Chorionic Gonadotropin / Q000032:analysis* / Q000276:immunology; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007118:Immunoassay / Q000295:instrumentation* / Q000379:methods; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation* / Q000379:methods; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods; D012371:Robotics / Q000295:instrumentation* / Q000379:methods; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods
chemical_list: D006063:Chorionic Gonadotropin