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- W3048629991 abstract "We have developed a new three-dimensional (3D) surface for use in biosensors that is based on modified novel thorns-like polyelectrolytes (3D-PETx), which comprises of poly-L-lysine (PLL) appended with multitude oligo (ethylene glycol) (OEG) and biotin moieties. It tethered to the sensor surface by PLL, while the OEG-biotin chains are forced to stretch away from the surface for target detections. Due to its 3D structure, the number of the OEG-biotin per surface unit is markedly increased compared to conventional 2D polyelectrolytes (2D-PET) coating. Their antifouling property and sensing performance for human IgG and PSA were compared with the 2D-PET by BioLayer Interferometry (Blitz), Surface Plasmon Resonance (SPR), microfluidic devices and Enzyme-Linked ImmunoSorbent Assay (ELISA). Experimental results show that 3D-PETx presents higher sensitivity for biomarker detection both in buffer and in serum and provides an almost non-fouling surface even in undiluted serum. In addition, a sensitive PSA detection was achieved in undiluted serum with a LOD down to 0.6 ng/mL. The successful immunosensing in undiluted serum demonstrate the potential of the 3D-PETx coating for real clinical applications." @default.
- W3048629991 created "2020-08-18" @default.
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- W3048629991 date "2020-11-01" @default.
- W3048629991 modified "2023-10-14" @default.
- W3048629991 title "Three-dimensional biosensor surface based on novel thorns-like polyelectrolytes" @default.
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- W3048629991 doi "https://doi.org/10.1016/j.bios.2020.112504" @default.
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