title: A surface plasmon resonance sensor on a compact disk-type microfluidic device.
abstract: A surface plasmon resonance (SPR) sensor on a compact disk (CD)-type microfluidic device was developed to miniaturize the elements of a complete analytical system, pump and valves. The CD-type microfluidic device was fabricated by attaching a polydimethylsiloxane disk plate that contained microchannels and reservoirs to a flat polycarbonate disk plate that contained grating films with a thin layer of Au. The optical system of the SPR sensor and the theory for its operation are based on the principle of a grating coupled-type SPR. The sample and reagent solutions in the reservoirs on the CD-type microfluidic device were sequentially introduced into the detection chamber by centrifugal force generated by the rotation of the microfluidic device. The variation of resonance wavelength was dependent on the refractive index of the sample solution. This CD-type SPR sensor was successfully used in an immunoassay of immunoglobulin A (IgA). The anti-IgA, blocking reagent, sample and washing solution in the reservoirs were sequentially introduced into the detection chamber by changing the frequency of rotation of the microfluidic device. IgA in the sample solution was adsorbed to the anti-IgA immobilized on the Au thin layer in the detection chamber and was then detected by the SPR sensor.
authors.affiliation: Mebius Advanced Technology Ltd., Tokyo, Japan.
authors.forename: Akihide
authors.initials: A
authors.lastname: Hemmi
authors.forename: Takashi
authors.initials: T
authors.lastname: Usui
authors.forename: Akihiro
authors.initials: A
authors.lastname: Moto
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Tobita
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Soh
authors.forename: Koji
authors.initials: K
authors.lastname: Nakano
authors.forename: Hulie
authors.initials: H
authors.lastname: Zeng
authors.forename: Katsumi
authors.initials: K
authors.lastname: Uchiyama
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Imato
authors.forename: Hizuru
authors.initials: H
authors.lastname: Nakajima
mesh_terms: D000888:Antibodies, Anti-Idiotypic / Q000032:analysis*; D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D016250:Compact Disks; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis*; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000295:instrumentation / Q000379:methods*
chemical_list: D000888:Antibodies, Anti-Idiotypic; D007070:Immunoglobulin A; C049937:anti-IgA