title: Preparation of a Surface-functionalized Power-free PDMS Microchip for MicroRNA Detection Utilizing Electron Beam-induced Graft Polymerization.
abstract: We propose an easy microchannel surface functionalization method for a poly(dimethylsiloxane) (PDMS) microchip that utilizes electron beam-induced graft polymerization (EIGP) as a platform for microchip-based biomarker analysis. Unlike other grafting techniques, EIGP enables rapid surface modification of PDMS without initiator immobilization. The grafted microchip is preservable, and can be easily functionalized for versatile applications. In this study, the surface-functionalized power-free microchip (SF-PF microchip) was used for the detection of microRNA (miRNA), which is a biomarker for many serious diseases. The EIGP enables high-density three-dimensional probe DNA immobilization, resulting in rapid and sensitive miRNA detection on the portable SF-PF microchip. The limit of detection was 0.8 pM, the required sample volume was 0.5 μL, and the analysis time was 15 min. The SF-PF microchip will be a versatile platform for microchip-based point-of-care diagnosis.
authors.affiliation: Department of Materials Science and Technology, Tokyo University of Science.
authors.forename: Ryo
authors.initials: R
authors.lastname: Ishihara
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Uchino
authors.forename: Kazuo
authors.initials: K
authors.lastname: Hosokawa
authors.forename: Mizuo
authors.initials: M
authors.lastname: Maeda
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kikuchi
mesh_terms: D001483:Base Sequence; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004583:Electrons; D035683:MicroRNAs / Q000032:analysis* / Q000235:genetics; D046208:Microchip Analytical Procedures / Q000379:methods*; D058105:Polymerization; D013499:Surface Properties
chemical_list: D004129:Dimethylpolysiloxanes; D035683:MicroRNAs; C013830:baysilon