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Aminolated and Thiolated PEG‐Covered Gold Nanoparticles with High Stability and Antiaggregation for Lateral Flow Detection of Bisphenol A
Author(s) -
Lin LiKai,
Uzunoglu Aytekin,
Stanciu Lia A.
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201702828
Subject(s) - bisphenol a , detection limit , polyethylene glycol , colloidal gold , peg ratio , biosensor , chemistry , nanoparticle , nanotechnology , materials science , chromatography , organic chemistry , finance , epoxy , economics
The few lateral flow assays (LFAs) established for detecting the endocrine disrupting chemical bisphenol A (BPA) have employed citrate‐stabilized gold nanoparticles (GNPs), which have inevitable limitations and instability issues. To address these limitations, a more stable and more sensitive biosensor is developed by designing strategies for modifying the surfaces of GNPs with polyethylene glycol and then testing their effectiveness and sensitivity toward BPA in an LFA. Without the application of any enhancement strategy, this modified BPA LFA can achieve a naked‐eye limit of detection (LOD) of 0.8 ng mL −1 , which is 12.5 times better than the LOD of regular BPA LFAs, and a quantitative LOD of 0.472 ng mL −1 . This modified LFA has the potential to be applied to the detection of various antigens.