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Facile preparation of polydiacetylene-based uniform porous fluorescent microspheres for potential immunoassay applications
作者:Wei Zhang, Yun Chen, Ya Shao and Li-Juan Fan*
關(guān)鍵字:polydiacetylene, fluorescent microspheres, polydiacetylene (PDA) vesicles
論文來源:期刊
具體來源:J. Mater. Chem. B, 2014, 2, 5249–5255
發(fā)表時間:2014年
Fluorescent microspheres are prepared by attaching self-assembled polydiacetylene (PDA) vesicles with carboxyl side groups onto the substrate amino-modified poly(glycidylmethacrylate) (APGMA) microspheres. The characterization by SEM, confocal microscopy and flow cytometry demonstrated that the final resulting microspheres are highly uniform both in size (with a diameter of 5 mm) and in fluorescence emission (coefficient of variance < 3%). The Brunauer–Emmett–Teller (BET) surface area of these spheres is 114 m2 .g-1. In addition, there are evenly distributed pores with an average size of 20.6nm on the spheres. These spheres are found to have good thermal stability and photostability, and do not suffer from fluorophore leaching. Fluorescein isothiocyanate (FITC) labelled bovine serum albumin (BSA) as a representative biomolecule can be easily attached onto the fluorescent microspheres. All these characteristics possessed by the APGMA–PDA spheres allow them to be directly used as carriers of biomolecules in lab-on-a-chip immunoassay systems.
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